Re: [RE-wrenches] AFCI tripping on SB 4000US-12
Comment below - -- Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer™ Emeritus California Solar & Electrical Contractor License #00833782 C-46, C-10, C-7, C-61 - D-56, D-31 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Underwriters Laboratories (UL) Certified PV Systems Installer #17, OSHA 30 Certificate OSHA-Authorized Construction Safety Trainer #32-0106614 CompTIA® Certified Technical Classroom Trainer (CTT+™ Certified) #T3NSZCNBBKB4QTQG Solar & Electrical Construction Consultant - 2nd Party Evaluations International Code Council® (ICC) Certified Residential Electrical Inspector - E1 #8343181 International Association of Electrical Inspectors (IAEI) Member - #7035507 Electric Vehicle Infrastructure Training Program (EVITP™) Certification #4039206 Contract Solar (PV) Technical Inspector - 3rd Party Inspections Certificate - Stanford | Center for Professional Development - Energy Innovation and Emerging Technologies (EIET) On Mon, Jun 19, 2023, 11:33 AM August Goers via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hi William - Is this a TL-21 inverter > <https://files.sma.de/downloads/SB3-5TL-21-IS-xx-14.pdf?_ga=2.101814081.1325009506.1687199204-2010138759.1678983058> > line from maybe 8 or 10 years ago? If I recall correctly, that was around > the time period that SMA was first shipping with AFCI detection - we had a > few SMA inverters from that vintage producing false AFCI errors. I think > that long home runs can be part of the issue and the inverter circuitry was > a little too sensitive. You might try calling SMA to see if there is a > firmware update or a way to disable AFCI if you feel comfortable > with disabling that safety feature. > Simply, would this be 690.11 and not be a situation of comfort, but "not in or on buildings," "metal(lic) raceways" or other requirements to comply with the exception? Separately, we've had a few phantom type AFCI errors on older modules and > after tons of troubleshooting we think that it might have been internal to > the modules themselves. > > Good luck! > > Best, August > > > On Mon, Jun 19, 2023 at 11:11 AM William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Friends: >> >> >> >> We installed a bunch of Shell SQ-150-PC modules on a ground mount almost >> 20 years ago. The original SB2500 inverters died so we upgraded to >> SB4000US-21 inverters. We had some ground fault or AFCI issues a number of >> years ago so we replaced all homeruns with PV wire which resolved the >> problem. >> >> >> >> These panels have J-boxes which we interconnected with 1/2” NMLT. The >> home runs are with PV wire with absolutely no splices and the inter-panel >> jumpers are THWN. >> >> >> >> Recently we started getting AFCI disturbances on one inverter. We >> isolated the fault to one string. We opened every pull box and panel J-box >> and all of the wiring looks dry, clean and tightly connected. We inspected >> every panel front and back and see no hotspots or visible corrosion. >> >> >> >> I have a megger I have never used. The homerun is kind of long so maybe >> it has insulation problems. I could isolate the homerun and megger those >> leads. I am researching if I can megger PV modules. It looks like this is >> commonly done. That looks like my next step. >> >> >> >> Does anyone have any ideas on what I should do next? I suppose I could >> start swapping each of the 10 modules in the problem string with panels in >> the non-problem strings, but that seems like a lot of work. >> >> >> >> Thanks in advance. >> >> >> >> William Miller >> >> >> >> Miller Solar >> >> 17395 Oak Road, Atascadero, CA 93422 >> >> 805-438-5600 >> >> www.millersolar.com >> >> CA Lic. 773985 >> >> >> >> >> ___ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >&
Re: [RE-wrenches] Cable Tray Marking
1. In addition, there's a conflict of signal words for NEC 110.21(B) Field-Applied Hazard Markings."Where caution, warning, or danger signs or labels are required by this Code, the labels shall meet the following requirements ..." In other words, one signal word is DANGER and the other signal word is WARNING. Simply, DANGER *will* result in ... and WARNING *could* result in ... 2. Specifically, in NEC 2020 690.31(D)(2) the signal word of WARNING" was *removed* and does not now appear to conflict? In California, 2017 NEC/2019 CEC 690.31(G)(3) still has the WARNING signal word. By the way, NEC 392.18(H) refers to 110.21(B). BTW, more information ANSI Z535 is found here: https://webstore.ansi.org/standards/nema/ansiz5352011r2017-1668874 All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy - Since 2016 California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 - Since 2004 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Thu, Sep 3, 2020, 5:53 AM Rebekah Hren wrote: > This is interesting, since the definition of high voltage was changed to > >1000V a few code cycles ago and it is somewhat consistently applied > throughout the NEC at that voltage (except for workspace clearances...er). > It seems this 392.18 label requirement could cause confusion and should be > changed to apply to >1000V circuits. However, the definition of high > voltage only applies with Article 490 , Equipment >1000V so the Article 392 > Cable Tray folks can do what they want in terms of where they require high > voltage labeling. I haven't done any research on the history of this > labeling requirement. > > > Corey maybe you would be willing to make a public input to change where > the label is required to >1000V circuits, thus there would be no > conflict with 690 since PV DC circuits in or on buildings cannot be >1000V. > Due Sept 10! > > 490.2 Definition. > > The definition in this section shall apply only within this article. > High Voltage. > > A potential difference of more than 1000 volts, nominal. > > Thanks for bringing this up Corey! > > > On Thu, Sep 3, 2020 at 12:36 AM Ray wrote: > >> This is interesting, because we were considering cable trays, too. My >> guess is that both requirements would apply. Picky, but I don't see that >> 690 exempts the requirements of 392. One is for PV, one is for over 600 v. >> Some code iteration in the future might have combined language for PV over >> 600 v " Danger - High Voltage Photovoltaic Source - Keep Away" and of >> course that's so verbose that the average Joe is just going to stick his >> paws in there anyway. >> >> Ray Walters >> Remote Solar >> 303 505-8760 >> >> On 9/2/20 7:54 PM, Corey Shalanski wrote: >> >> Wrenches, >> >> I am curious about the marking requirements for cable trays containing PV >> source/output circuits rated over 600 volts, installed on a building: >> >> >> NEC 392.18(H) requires a permanent, legible warning notice carrying the >> wording “DANGER — HIGH VOLTAGE — KEEP AWAY” at least once every 10 ft. >> >> NEC 690.31(G)(3) requires a label or marking with the wording "WARNING: >> PHOTOVOLTAIC POWER SOURCE" at least once every 10 ft. >> >> Does the 690.31 label take precedence? Are there any situations where >> both labels would be required (or recommended)? >> >> -- >> Corey Shalanski >> Jah Light Solar >> Portland, Jamaica >> >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & >> settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette:www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios:www.member
Re: [RE-wrenches] IAEI Online Articles
FYI - I've been using the IAEI App found here: http://bit.ly/IAEIApp1 with access to past issues. All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 - Since 2004 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Thu, Aug 20, 2020, 2:41 PM Ryan Mayfield wrote: > Looks like they changed their URL (and access style), seems odd they don't > have the old one redirect you... > > > https://www.iaei.org/Online/Magazine/Online/IAEI_Magazine.aspx?hkey=859b0900-7ea8-490b-8915-0c5993d14a89 > > > > > On Thu, Aug 20, 2020 at 2:29 PM Jason Szumlanski < > ja...@floridasolardesigngroup.com> wrote: > >> I thought it was just me. It has been like that for a few weeks. >> >> >> >> >> On Thu, Aug 20, 2020 at 4:50 PM Corey Shalanski >> wrote: >> >>> Does anyone know what happened to the online IAEI magazine article >>> website: https://iaeimagazine.org/ >>> <https://mailtrack.io/trace/link/de698899b103412449d867c0be5398aadcc7b953?url=https%3A%2F%2Fiaeimagazine.org%2F&userId=1613865&signature=aea8e3c01a292e70> >>> >>> It no longer seems to be accessible? >>> >>> -- >>> Corey Shalanski >>> Jah Light Solar >>> Portland, Jamaica >>> ___ >>> List sponsored by Redwood Alliance >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> <https://mailtrack.io/trace/link/41e914c2085b3b5a62d4e5b1187860f35d19005c?url=http%3A%2F%2Flists.re-wrenches.org%2Foptions.cgi%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=dff11691c36e45ba> >>> >>> List-Archive: >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> <https://mailtrack.io/trace/link/f92a20adeaaf7eeb637ed7cc5da6d5b7b7badd43?url=http%3A%2F%2Flists.re-wrenches.org%2Fpipermail%2Fre-wrenches-re-wrenches.org&userId=1613865&signature=e7df488506df900e> >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> <https://mailtrack.io/trace/link/8cdc54c93a33e19f4770fb6b456cfbc00a88993f?url=http%3A%2F%2Fwww.re-wrenches.org%2Fetiquette.htm&userId=1613865&signature=3792e65fea94a2d1> >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >>> <https://mailtrack.io/trace/link/107b1d91b972afd352f51b2fde43966b8949ca1e?url=http%3A%2F%2Fwww.members.re-wrenches.org&userId=1613865&signature=6490b797bc3f7405> >>> >>> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > > -- > [image: photo] <https://www.mayfield.energy/> > *Ryan Mayfield* > *Founder & CEO* > > *(541) 231-9984 <(541)+231-9984>* | *ryan@mayfield.energy > * > > www.mayfield.energy > <https://www.linkedin.com/in/ryanmayfield/> > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] protecting wire below 8'
Simply, the '2.5 m' (8 ft) has been inferred from Article 110.27(A)(4). It's interesting now that the distance in the 2019 CEC/2017 NEC has increased based on voltage. In other words, if the voltage is greater than 301 volts the minimum would be 8 ft 6 in. :) All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Fri, Jul 17, 2020, 7:32 PM August Goers wrote: > Hi Kirk - We work in San Francisco where they have a local code amendment: > <https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_building/0-0-0-84935> > > 300.4(I) Add the following section: > (I) Subject to Physical Damage. Premises wiring systems installed less > than 2.44 m (8 feet) above a walking surface or finished floor are > considered subject to physical damage. > > As far as I'm aware otherwise, there is not a specific definition > specifying 8' for physical damage in the broader NEC - I think it's just up > to the AHJ. > > August > Luminalt > > > > > On Fri, Jul 17, 2020 at 8:38 AM Kirk Herander wrote: > >> All, >> Is there a reference to this so-called "8-foot rule" that someone could >> point me to in the NEC? Thanks. >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Rapid Shutdown Compliance
Drake, I concur with your approach on this item - 1. Either the shock hazard was reduced by NEC 690.12 with MLPE for the workers *too* or folks have been qualified persons in accordance with NEC 690.4(C) to recognize and avoid the shock hazard for string inverters. 2. Specifically, there's this incident on the list found here: https://www.osha.gov/pls/imis/accidentsearch.accident_detail?id=101927.015 In other words, would this incident have been minimized with the use of MLPE? On Wed, May 6, 2020, 5:41 PM wrote: > Interestingly enough, the data on the link > <https://www.osha.gov/pls/imis/AccidentSearch.search?p_logger=1&acc_description=&acc_Abstract=solar&acc_keyword=&sic=&naics=&Office=All&officetype=All&endmonth=05&endday=05&endyear=2002&startmonth=05&startday=05&startyear=2021&InspNr=> > provided > shows accidents from gas explosions, falls, health problems and industrial > injuries. None of these incidents could have been prevented by module level > power electronics. This is typical of the data that I've seen so far. > --- > > > > On 2020-05-06 17:22, Martin Herzfeld wrote: > > There could be an issue of encouraging MLPE for worker safety? > > 1. This is data involving incidents with workers in the OSHA Fatalities > and Catastrophe Investigation Summaries found here: > > https://www.osha.gov/pls/imis/AccidentSearch.search?p_logger=1&acc_description=&acc_Abstract=solar&acc_keyword=&sic=&naics=&Office=All&officetype=All&endmonth=05&endday=05&endyear=2002&startmonth=05&startday=05&startyear=2021&InspNr= > > 2. In the past I've observed an arc fault at the module level with > traditional string systems without a listed arc-fault circuit interrupter > NEC/CEC 690.11. The function in NEC/CEC 690.12 would be - to *reduce the > shock hazard *- for *emergency responders* or *firefighters? (NEC 2020).* > However, I've observed thermal events in the panelboard with plans and > workmanship issues. > > On the other hand, falls are the #1 reason for incidents in the > construction industry. > > All the best, > > Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified > Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC > 10037 > Contract Training Provider (CTP) > Adjunct Professor, Energy > > California Solar & Electrical Contractor License #00833782 C46, C10, > D56, D31, C-7 - Since 2004 > Solar, Electrical, Trenching, Pole Installation & Maintenance, > Instrumentation > > Contract Solar (PV) Technical Inspector - 3rd Party Inspections > Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 > OSHA-Authorized Construction Trainer #32-0105338 > CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG > > * Professional Member, International Association of Electrical Inspectors > #7035507 - Since 2006 > * Accredited and Registered North American Board of Certified Energy > Practitioners (NABCEP) Continuing Education (CE) Training Provider > > > On Thu, Apr 30, 2020, 8:29 AM > wrote: > > > I would like to see real data on the fire risk of string inverters. > Anecdotal problems are not data. > > The industry is definitely heading toward MLPE due to the rapid shutdown > requirements. In many cases MLPE makes sense, in other cases it doesn't. > > Systems that are more cost effective and reliable can often be built by > using string inverters. > --- > > > > > On 2020-04-29 22:05, Jason Szumlanski wrote: > > "Rapid Shutdown does not prevent fires." > > Not true. If the effect of RS is to steer the market to MLPE, I believe it > has a significant impact on reducing fire risk. As one who has watched a DC > conductor fire smolder out of control, I am sold on an AC module or > microinverter architecture. While RS on a DC array doesn't necessarily > reduce fire risk within the array, it still has the potential to reduce > severity and spread. Nothing is going to prevent all fires. I get that. > We're talking about risk mitigation when it comes to RS. > > As for "dependable string inverters," the one dependable feature is > failure at least once in the module lifetime, accompanied by a shocking > repair bill. > > I'm not a shiny object following kind of guy, but the writing is on the > wall. MLPE is the future. Modular, serviceable, disposable if you will. > Like it or not, Edison is going to lose this battle to Tesla (Tom vs > Nikola). And I live less than 5 minutes away from Tommy E's winter home in > Fort Myers, FL. And I "grew up" in the industry living off-grid in DC > power.
Re: [RE-wrenches] Rapid Shutdown Compliance
There could be an issue of encouraging MLPE for worker safety? 1. This is data involving incidents with workers in the OSHA Fatalities and Catastrophe Investigation Summaries found here: https://www.osha.gov/pls/imis/AccidentSearch.search?p_logger=1&acc_description=&acc_Abstract=solar&acc_keyword=&sic=&naics=&Office=All&officetype=All&endmonth=05&endday=05&endyear=2002&startmonth=05&startday=05&startyear=2021&InspNr= 2. In the past I've observed an arc fault at the module level with traditional string systems without a listed arc-fault circuit interrupter NEC/CEC 690.11. The function in NEC/CEC 690.12 would be - to *reduce the shock hazard *- for *emergency responders* or *firefighters? (NEC 2020).* However, I've observed thermal events in the panelboard with plans and workmanship issues. On the other hand, falls are the #1 reason for incidents in the construction industry. All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 - Since 2004 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Thu, Apr 30, 2020, 8:29 AM wrote: > > I would like to see real data on the fire risk of string inverters. > Anecdotal problems are not data. > > The industry is definitely heading toward MLPE due to the rapid shutdown > requirements. In many cases MLPE makes sense, in other cases it doesn't. > > Systems that are more cost effective and reliable can often be built by > using string inverters. > --- > > > > > On 2020-04-29 22:05, Jason Szumlanski wrote: > > "Rapid Shutdown does not prevent fires." > > Not true. If the effect of RS is to steer the market to MLPE, I believe it > has a significant impact on reducing fire risk. As one who has watched a DC > conductor fire smolder out of control, I am sold on an AC module or > microinverter architecture. While RS on a DC array doesn't necessarily > reduce fire risk within the array, it still has the potential to reduce > severity and spread. Nothing is going to prevent all fires. I get that. > We're talking about risk mitigation when it comes to RS. > > As for "dependable string inverters," the one dependable feature is > failure at least once in the module lifetime, accompanied by a shocking > repair bill. > > I'm not a shiny object following kind of guy, but the writing is on the > wall. MLPE is the future. Modular, serviceable, disposable if you will. > Like it or not, Edison is going to lose this battle to Tesla (Tom vs > Nikola). And I live less than 5 minutes away from Tommy E's winter home in > Fort Myers, FL. And I "grew up" in the industry living off-grid in DC > power. But AC distribution wins for safety at various scales. > > > > > > > On Wed, Apr 29, 2020, 9:42 PM > wrote: > > Rapid Shutdown does not prevent fires; it was originally drafted to allow > firefighters to vent a roof without being hindered by energized PV arrays. > This rule was expanded to include other DC wiring from PV sources. > > As for PV safety, I'd like to see some significant, statistical evidence > that shows there is a major fire danger from PV relative to other sources. > A fire from a solar array gets a lot more press than one from a gas leak, > bad wiring or an ash tray emptied into a wastepaper basket. > > Large public buildings should have all the protection that is available. > Does one size fit all? > > Would it be reasonable to allow residential installations under 12 kW, > with 1/4 of the roof adjacent to the array available for venting, to be > excepted from 690.12? What about sparsely occupied commercial buildings > with ample roof area open for ventilation? > > Many of us have chosen to work with renewable energy technology to lessen > the harms caused by fossil fuel extraction and combustion. The need for > non-carbon based energy sources has become extremely clear. > > The old string inverters still chug along year after year, with little or > no maintenance. Someone must pay f
Re: [RE-wrenches] Rapid Shutdown Compliance
1. I use a MLPE residential ground-mounted solution - rapid shutdown or not. w/Accessible MLPE. 2. There is a maximum physical string length for me to keep in mind, for instance, found here: "In the context of this document, string length refers to the number of optimizers and modules in the string. When designing the installation make sure to maintain the maximum physical string length as well: The total cable length of the string (excluding power optimizers’ conductors) should not exceed 1000ft./300m from DC+ to DC- of the inverter (2,300ft./700m when using the SE14.4KUS, SE30KUS,SE33.3KUS, SE43.2KUS, SE66.6KUS and SE100KUS inverters)" https://www.solaredge.com/sites/default/files/string_sizing_na.pdf All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors (IAEI) #7035507 - Since 2006 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Wed, Apr 29, 2020, 8:17 AM Jay wrote: > Hi Drake > > I will disagree, there have been many roof top fires. > > But regardless we have to do these new regulations and I for one welcome > the safety. > > The main issue is accessing the faulty/suspect component under the module > possibly requiring removing multiple modules, a slow and expensive process. > > My technique is to install the MLPE at the edges of the array, using wire > extensions. That way at most I have to remove a single module. And Im > working on a drop bracket which would allow better cooling and easier > access without module removal to the MLPE, greatly reducing time to swap. > > Jay > > Peltz Power. > > > > > > On Apr 29, 2020, at 7:59 AM, drake.chamber...@redwoodalliance.org wrote: > > > > Clearly, rapid shutdown increases cost and reduces reliability. Given the > excellent safety record of PV, prior to rapid shutdown being required, it > is unnecessary. The few anecdotal incidents of PV fires were not enough to > justify the requirement, especially on smaller systems. > > According to a friend who worked for a local installation company that > went under, a big part of the reason for their failure was the chronic > replacement of microinverters and optimizers. > > What steps can be taken to create some balance in the rapid shutdown > requirements that are in the NEC? > > > --- > > > > On 2020-04-29 07:27, Sky Sims wrote: > > So far rapid shutdown has been a nightmare. It's added a lot of cost for > no measurable benefit. > Using always off devices like midnight solar and Tigo makes it impossible > to test open circuit voltages. Which opens the door to tons of problems > when commissioning systems. > Also we've been trying out midnight Solar's product and have had an absurd > failure rate. Which means lots of truck rolls and troubleshooting and > system downtime. They send replacement product but they aren't paying for > the lost weeks of productivity. > We have Tigo product in hand and are deciding which project to try it on. > But our big concern about using it is not only the inability to confirm > open circuit voltage of the strings but also the way panels bypass if the > device doesn't allow the panel to connect properly. Both of these features > are a recipe for problems and potential troubleshooting nightmares. The > warranty from Tigo doesn't cover our expense if the product fails. And > that's really what our reservations about the product boil down to right > now. If we're on a job with 50 units and one fails, the contractor or the > homeowner will be the ones eating the expense of finding it and replacing > it. There has to be a better option. > > Sky Sims > Https://EcologicalSystems.biz > > On Apr 28, 2020, at 7:46 PM, Corey Shalanski wrote: > > Now that 690.12 of the *NEC* 2017 has been in effect for several years, I > am curious how designers and installers are meeting the associated > requirements with string inverter-based systems (*not* considering > microinverters or DC optimizers). I am generally a fan of the KISS > principle, and as best I can determine the *
Re: [RE-wrenches] Industry Publications
I'd suggest IAEI magazine found here: https://iaeimagazine.org/magazine/ All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7, Since 2004 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member Since 2006, International Association of Electrical Inspectors * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Training Provider On Thu, Apr 16, 2020, 9:28 PM Corey Shalanski wrote: > Wrenches, > > Like myself, I imagine many folks on this list were avid readers of "Home > Power" and "SolarPro" magazines. I know some of you were even active > contributors to these two wonderful publications. > > Is anyone aware of any similar resources - geared toward system > designers/installers/technicians (or just general enthusiasts)? Besides > this list, where are Wrenches turning to nowadays for relevant discussion > of current industry topics? > > -- > Corey Shalanski > Jah Light Solar > Portland, Jamaica > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Ground mount fire code clarifications
Dan, I think there should more discussions on ground-mounted arrays as an option in addition to rooftop systems - to get out ahead of any issues. In addition, any renderings for ground-mounted arrays and ground-mounted stuff as ESSs. 1. By definition, a brush could mean a "slight and fleeting touch" - which we do not want to do at these times :) or "undergrowth, small trees and shrubs." 2. The challenge also in one and and two family dwellings when there is a setback of only (3) three feet as an accessory structure and the (10) foot rule. 3. I think mounts can be categorized in general as SPMs (Side of Pole Mounts), TPMs (Top of Pole Mounts), MPM's (Multiple Pole Mounts) or an Open Structure with the ability to walk underneath or a Closed structure where you can not walk underneath. 4. BTW, you may wish to look at versions of ISEP and the IRC too? "A. RS402.4 (R324.6) Ground-mounted photovoltaic systems. Ground-mounted photovoltaic systems shall be designed and installed in accordance with Section (R301). B. RS402.4.1 (R324.6.1) Fire separation distances. Ground-mounted photovoltaic systems shall be subject to the fire separation distance requirements determined by the local jurisdiction." 5. Gravel and the various types is also my goto soil amendment. In California, I'd also suggest working with a C27 Landscaping Contractor on what type of blue flowers would be okay. What do you think? All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Contract Training Provider (CTP) Adjunct Professor, Energy California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider Telephone & Text: 510.243.0190 On Fri, Mar 20, 2020, 4:06 PM Dan Fink wrote: > Hello esteemed Wrenches; I am trying to clear this up for a client and his > AHJ, which is also puzzled at how to interpret IFC 2018, Section 1204.4, > which states: > > Setback requirements shall not apply to ground-mounted, free-standing >> photovoltaic arrays. A clear, brush-free area of 10 feet (3048 mm) shall be >> required for ground-mounted photovoltaic arrays. > > > I found one lone informational note in a white paper stating this was to > prevent a burning PV array from igniting surrounding vegetation and the > fire spreading. > > So, has anyone dealt with an AHJ on this before? Our questions are: > >- What exactly is a "free-standing photovoltaic array" that is exempt? >A pole mount? Couldn't burning debris from that ignite vegetation >underneath? >- What exactly does "A clear, brush-free area of 10 feet (3048 mm)" >mean? "10 feet" is a linear measurement, not an area, that would be in >square feet. >- What is "brush"? Does grass count as brush? > > I would interpret this on the safe side as meaning that all vegetation > under the PV array and out to a 10 foot perimeter should be cleared, except > for pole-mount arrays (that exception makes no sense to me). > > I always recommend to clients that the area *under* the ground mount > array should be pea gravel bordered by railroad ties, but out to 10 feet > from the array edge seems excessive. > > Any input greatly appreciated! > > Dan Fink > Executive Director, Buckville Energy Consulting > NABCEP PV Associate > NABCEP Certified PV System Inspector > IREC Certified Instructor™ for: > ~ PV Installation Professional > ~ Small Wind Installer > NABCEP Registered Continuing Education Providers > d anbo...@gmail.com > 970-672-4342 > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance
Re: [RE-wrenches] Solar set backs
Simply, an emphasis is now also on the location of ESSs in non-habitable and habitable spaces and the size in kWh. BTW, I attended a day of of a two day free IAFF Conference in California announced through the IAEI, with UL found here: https://connect.ul.com/meeting-challenges-of-built-environment-sacramento.html#meetingagenda All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9d7c90630bb9/public_url Adjunct Professor, Energy, American River College Contract Training Provider (CTP) California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider On Tue, Jul 10, 2018, 2:38 PM Wayne Irwin wrote: > Calfire code seems to be the standard being somewhat enforced as the > standard nationwide. > > Wayne Irwin, > President > License #CVC56695 > State Licensed Solar Contractor > Pure Energy Solar International Inc. > wa...@pureenergysolar.com > http://PureEnergySolar.com > http://SolarChargingStation.net > 352 377-6527 Office > 352 336-3299 Fax > > > The Sun Is Always Shining! > > The content of this message is Pure Energy Solar Confidential. If you are > not the intended recipient and have received this message in error, any use > or distribution is prohibited. Please notify me immediately by reply e-mail > and delete this message from your computer system. Thank you. > -- > *From:* RE-wrenches on behalf > of Daniel Young > *Sent:* Tuesday, July 10, 2018 5:25:01 PM > *To:* 'RE-wrenches' > *Subject:* Re: [RE-wrenches] Solar set backs > > > Hey Gary, > > > > Ohio Fire Code does cover this. It’s a matter of if the Fire marshal in > you project area wants to waive or alter the requirements. > > > > http://codes.ohio.gov/oac/1301:7-7-06v1 > > > > Specifically 605.11.1.2 is for residential buildings. There is some > conflict in terms of Hip roofs in the code there. 605.11.1.2.2 states a > single 3ft path on one edge or another for a hip roof, but 605.11.1.2.4 > states that an 18 space is allowed when modules are mounted on two adjacent > roof planes with a hip roof. > > > > With Regards, > > > > Daniel Young, > > NABCEP Certified PV Installation ProfessionalTM: Cert #031508-90 > > > > *From:* RE-wrenches *On > Behalf Of *gary easton > *Sent:* Monday, July 09, 2018 3:39 PM > *To:* RE-wrenches > *Subject:* [RE-wrenches] Solar set backs > > > > Hello Wrenches, > > What are you all seeing required as setbacks post 2017? I am having > inspectors vary between wanting a 3' lane at the bottom and sides to > allowing the array down to the gutter, and from requiring between 18" and > 3' at the ridge. > > > > -- > > Gary Easton > Appalachian Renewable Power > > Stewart, Ohio 45778 > NABCEP Certified Solar PV > > T: 740-277-8498 > > www.arp-solar.com > > > “First they ignore you. Then they laugh at you. Then they fight you. Then > you win.” > > ~Ghandi > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] NEC in PDF format not availaible for 2020
FYI Only - In California, the Codes are found here: https://www.dgs.ca.gov/BSC/Codes#@ViewBag.JumpTo All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 Adjunct Professor, Energy, American River College Contract Training Provider (CTP) California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider On Sun, Jan 12, 2020, 6:11 AM Christopher Warfel < cwar...@entech-engineering.com> wrote: > I think that once a building code is adopted it must be made available at > no charge. You bring up a good point. The NEC is incorporated into many > state's and the International Code. Why can they charge for all access? > Chris > On 1/8/2020 6:36 PM, William Miller wrote: > > Friends: > > > > I find the PDF version best for my uses. A portable, searchable, > bookmark-able and cut and paste-able resource is essential for my work flow. > > > > I don’t think the NFPA is considering the needs of the field engineer when > eliminating the PDF version. Maybe there are some members of this forum > that have the ear of the NFPA and can put in a word to restore the portable > version. > > > > As an aside, I find it troubling that one has to pay to read any law of > the land. If a society makes rules, they should be freely available for > all to review, free of charge. That is just my altruistic bias. > > > > William Miller > > Miller Solar > > > > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out or update participant bios:www.members.re-wrenches.org > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] NEC 2020 not available as a portable PDF?
FYI - 1. As a member of the IAEI, "after three consecutive renewals you are eligible to receive a free National Electrical Code (NEC) book" as found here: https://www.iaei.org/Online/Benefits.aspx 2. I've been a member of IAEI for years and I've have received free NEC Code books. I've enjoyed the portable NFPA NEC portable "phone app" which did not required an internet connection found here: https://www.nfpa.org/Codes-and-Standards/All-Codes-and-Standards/NFPA-digital-products - also now not available. 3. In other words, since I'm forced to use only the portable "paper copy," I'd rather receive it for free with other IAEI member benefits. All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9d7c90630bb9/public_url Adjunct Professor, Energy, American River College Contract Training Provider (CTP) California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG https://www.youracclaim.com/badges/f23ae19b-0370-4ca1-99d1-418403a8faea/linked_in_profile Contract Solar (PV) Technical Inspector - 3rd Party Inspections * Professional Member, International Association of Electrical Inspectors (IAEI) * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider On Wed, Jan 8, 2020, 4:34 PM Bradley Bassett wrote: > The best price I've found for the handbook is at Barnes & Noble. If you go > into the store you have to ask for the internet price. Also at least at my > store they had it behind the counter in case you go looking for it. > > Brad > > On Wed, Jan 8, 2020 at 3:26 PM Jason Szumlanski < > ja...@floridasolardesigngroup.com> wrote: > >> We are going backwards in this world. Thanks for making us less >> productive, NFPA. #Greedy. >> >> On Wed, Jan 8, 2020 at 5:26 PM gary easton wrote: >> >>> It’s a subscription. The digital you pay for access each year. >>> >>> On Wed, Jan 8, 2020 at 5:20 PM Glenn Burt wrote: >>> >>>> It is true, I have both 2017 and 2014 in PDF format. >>>> >>>> They must be concerned about piracy. >>>> >>>> -Glenn >>>> Sent from my 'smart'phone, so please excuse typos and spelling errors. >>>> >>>> -- Original message-- >>>> *From: *August Goers >>>> *Date: *Wed, Jan 8, 2020 3:48 PM >>>> *To: *RE-wrenches; >>>> *Cc: * >>>> *Subject:*Re: [RE-wrenches] NEC 2020 not available as a portable PDF? >>>> >>>> I've heard from multiple sources and confirmed myself that you can't >>>> get the portable pdf of the NEC starting with the 2020 edition. The link >>>> that Lorenzo shared seems to indicate that older versions including 2017 >>>> edition are available in a digital format. >>>> >>>> [image: image.png] >>>> >>>> August >>>> Luminalt >>>> >>>> >>>> On Wed, Jan 8, 2020 at 12:35 PM Christopher Warfel < >>>> cwar...@entech-engineering.com> wrote: >>>> >>>>> Wrenches, >>>>> >>>>> I was told that the NEC 2020 will not be available as a file. You can >>>>> only access on line, or via the book. Has anyone confirmed this? It >>>>> seems pretty certain. How many times is one out in the field and >>>>> needs >>>>> to reference the NEC? Now to do so, you will need the book or a >>>>> connection to the Internet. I am having a hard time believing that >>>>> NFPA >>>>> would be this short-sighted. Chris >>>>> >>>>> ___ >>>>> List sponsored by Redwood Alliance >>>>> >>>>> List Address: RE-wrenches@lists.re-wrenches.org >>>>> >>>>> Change listserver email address & settings: >>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>>> >>>>> List-Archive: >>>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>>>> >>>>&g
Re: [RE-wrenches] Good Tablets for the Solar Installer
Kelly. Simply, I use my phone for almost everything which is about the size of a small piece of toast these days with Samsung DeX for with bluetooth full size keyboard, mouse and HDMI display on my desk. I am able with DeX to edit a annotate pdfs, presentations, Word, Excel, micro and dc converter equipment configuration, FLIR attachment for third party inspections, irradiance, quick augmented reality survey, online meeting, email and other things. I have a Suface as secondary, I do most everything needed and a lot less as well. All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 California Solar & Electrical Contractor License #00833782 C46, C10, D56, D31, C-7 Solar, Electrical, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG * Professional Member, International Association of Electrical Inspectors #7035507 * Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider On Tue, Sep 17, 2019, 1:08 PM Jerry Shafer wrote: > Kelly > By the time you buy all the extras vs a basic laptop fewer items to carry > and loose. > I do programming in Hawaii and California and my Dell still can do e > everything needed and a lot less money but that's just me "KISS" > > On Tue, Sep 17, 2019, 1:02 PM James Rudolph > wrote: > >> We are transitioning from Dell laptops to Surface Pro's with cell >> service. >> The flexibility of these units in the field seems to be unrivaled. >> >> >> >> *James B. Rudolph* >> >> *Hawai'i Unified* >> >> *Director of Energy* >> >> *ES Electrician # 10816* >> >> *NABCEP Certified PV Installer # 091209-155* >> >> *808.594.9969* >> >> >> >> >> >> >> >> On Tue, Sep 17, 2019 at 9:14 AM Kelly Larson >> wrote: >> >>> Esteemed wrenches, >>> >>> I am looking to buy a PC tablet/laptop for testing in the field. I will >>> be using a Solmetric PVA, Seaward 210 and Survey, excel spreadsheet, >>> internet, and email. >>> >>> I also would like to be able to read and annotate pdfs. >>> >>> Suggestions? What do you use? What are the advantages and shortcomings >>> of your device? >>> >>> Thank you for your response in advance! >>> >>> Kelly >>> >>> >>> ~~~ >>> Kelly Larson >>> Electrical Engineer >>> NABCEP Certified PV Installation Professional™ >>> NABCEP Certified PV Installer Specialist™ >>> NABCEP Certified PV Commissioning & Maintenance Specialist™ >>> IREC Certified Master Trainer™/ PV >>> CA Electrical Contractor# 868189 >>> SolarKelly.com >>> >>> >>> ___ >>> List sponsored by Redwood Alliance >>> >>> List Address: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >>> >>> List rules & etiquette: >>> www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> www.members.re-wrenches.org >>> >>> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SolarEdge reliability declining...???
Good to know. 1. I just installed the latest SetApp inverters (the ones without displays) for a ground-mounted array with the inverter in the dwelling. 2. The ground-mounted system had to comply with CEC 2016/NEC 2014 690.12 in California because the system was "in the building." Would the inverter in an indoor or outdoor location be a factor in the failures? All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9d7c90630bb9/public_url Adjunct Professor, Energy, American River College Contract Training Provider (CTP) Since 2004. California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation Contract Solar (PV) Technical Inspector - 3rd Party Inspections Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG https://www.youracclaim.com/badges/f23ae19b-0370-4ca1-99d1-418403a8faea/linked_in_profile * Professional Member, International Association of Electrical Inspectors * Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider https://coursecatalog.nabcep.org/providers/martin-herzfeld On Wed, Jul 24, 2019, 7:37 AM Howard Arey wrote: > Have any of you seen significant declines in SolarEdge inverter > reliability? > > We are having more inverter failures that at any time in the past five > years of installing SolarEdge. Lots of Code 181 hardware failures mostly in > the latest SetApp inverters (the ones without displays.) > > To compound matters, the RMA process is getting way too long and we are > waiting appx 3 weeks on average to receive a replacement. Customers > definitely not happy… > > What are you all seeing? > > > > *Howard “Scot” Arey* > > Owner, Solar CenTex > > NABCEP Certified PV Installation Professional > > 254-300-1228 > > scot.a...@solarcentex.com > > > > www.solarcentex.com > > https://www.facebook.com/SolarCentex > > [image: Solar Centex Logo - No Back] > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] High altitude off-grid systems
1. In addition, manufactures provides guidance and altitude considerations tables for those applications that require operation at high altitudes - e.g. "altitudes in excess of 6,562 feet (2000 m)" of electromechanical equipment (contactors and starters) and PV modules 2. For instance, one module manufacture "The installation place should be less than 1,000m (3280ft) above sea level." And higher altitude installations are allowed only if wind pressure is a factor. BTW, manufactures may not specifically follow NEC 90.9(B) and the dual system of units :) All the best, Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9d7c90630bb9/public_url Adjunct Professor, Energy California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation Contract Technical Inspector Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG https://www.youracclaim.com/badges/f23ae19b-0370-4ca1-99d1-418403a8faea/linked_in_profile * Member, California Solar & Storage Association * Professional Member, International Association of Electrical Inspectors #7035507 * Accredited and Registered North American Board of Certified Energy Practitioners (NABCEP) Continuing Education (CE) Provider On Tue, Apr 16, 2019, 5:12 PM Jay wrote: > For the Radian > Page 59 of the operators manual ( it’s a different set of environmental > specifications than the install manual or data sheets) > 2000m max altitude. > > Jay > Peltz power. > > On Apr 16, 2019, at 12:11 PM, ch...@oasismontana.com> wrote: > > Let’s see it in writing, in the manuals included with the components and > in the online, downloadable manuals. Clarity is of the essence! > > > > Chris Daum > > Oasis Montana Inc. > > 406-777-4309 or 4321 > > 406-777-4309 fax > > www.oasismontana.com > > > > > > > > *From:* RE-wrenches *On > Behalf Of *Lones Tuss > *Sent:* Friday, April 12, 2019 1:14 PM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] High altitude off-grid systems > > > > Hello All > > Outback’s Product Warranty is not based or negated by the altitude of the > installation. Altitude ratings ensure full spec operation of the equipment > up to the stated elevation . As noted in several posts due to thinner air > cooling of equipment can be affected. Additional cooling may be required > and or additional products to achieve the necessary load requirements. > > > > > > > > *From:* RE-wrenches *On > Behalf Of *jerrysgarage01 > *Sent:* Friday, April 12, 2019 11:26 AM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] High altitude off-grid systems > > > > Wrenches > > Here is the math, well the answer at sea level your body has 14.70 PSI > exerted on it, at 10,000 feet you only have 10.163 PSI, reduced air > pressure, reduced cooling or heating ability adjusted for standard sea > level temp or just over 69%. > > I have done work in Hawaii on the big island up at the summit, it can be > warm and very thin air, without air to cool no inverter will perform very > well. I have some SMA, FX and Raidians in warm high altitude locations and > added extra cooling to compensate for the lack of air. You will hear the > cooling fans spinning faster, moving less air at higher altitudes. > > SMA sunny island does have a 9k plus operating altitude but de-rates at > less the 7k. > > Jerry > > PV inspector > > > > > > > > Sent from my Verizon, Samsung Galaxy smartphone > > > > Original message > > From: Jay Pozner > > Date: 4/12/19 10:06 AM (GMT-08:00) > > To: RE-wrenches > > Subject: Re: [RE-wrenches] High altitude off-grid systems > > > > > > > > We do a fair amount of systems at "altitude". Recently we had an issue > with a Radian system at about 10,000'. An 8048 inverter screaming (fans > running hard) with just 2000 watts of load. I hounded tech support for two > years, and even after switching power modules, etc in the end the techs > claim a fairly substantial deration (that I can't quote right now) of > inverter performance because of cooling issues. We ultimately added > another inverter to the system at the end of last summer. I hope this > season we will see a better result. It makes sense, given the difference > in air density, but I do scratch my head and wonder why we haven't seen > such issues wit
Re: [RE-wrenches] Ibew is working to exclude C-46 contractor’s from installing Batteries.
1. "... license gives one the ability to do anything, " but maybe not as well as a solar energy systems *specialty* contractor in California. :) 2. Experience requirements for both and all may be found here: http://www.cslb.ca.gov/Contractors/Applicants/Contractors_License/Exam_Application/Experience_For_Exam.aspx 3. For example, I also have a C-7 (Instrumentation - Monitoring), D31(Pole Mounts) and D56 (Trenching - Ground-Mounts) In other words, bump cap, hard hat (helmet), or feather? Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9d7c90630bb9/public_url Adjunct Professor, Energy, American River College California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation email: m...@herzfeld.org Contract PV Systems Inspector Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Registered North American Board of Certified Energy Practioners (NABCEP) Continuing Education (CE) Provider On Mon, Mar 26, 2018, 5:01 PM James Rudolph wrote: > Aloha All, > Does anybody know the requirements for the C-46? I would assume if you > could qualify for that ( C-46) you could also qualify for a C-10 (C-13 > Hawaii). > The full license gives one the ability to do anything, and this seems like > the way to go for versatility. "If you can't beat'em...join them." > > *C-10 - Electrical Contractor* > > An electrical contractor places, installs, erects or connects any > electrical wires, fixtures, appliances, apparatus, raceways, conduits, > solar photovoltaic cells or any part thereof, which generate, transmit, > transform or utilize electrical energy in any form or for any purpose. > > > > > *C-46 - Solar Contractor* > > A solar contractor installs, modifies, maintains, and repairs thermal and > photovoltaic solar energy systems. A licensee classified in this section > shall not undertake or perform building or construction trades, crafts, or > skills, except when required to install a thermal or photovoltaic solar > energy system. > What is needed to qualify: http://www.cslb.ca.gov/Contractors/Applicants/Contractors_License/Exam_Application/Experience_For_Exam.aspx > > > *James B. Rudolph* > > *Hawaii Unifed* > > *Director of Energy* > > *ES Electrician # 10816* > > *NABCEP Certified PV Installer # 091209-1* > > > > > > > On Fri, Mar 23, 2018 at 3:02 PM, Jason Andrade < > ja...@westcoastsustainables.com> wrote: > >> Hi at this point I believe this is a California only issue, but I was >> contacted by CalSeia today and was asked to be involved in a discussion >> regarding a move where only a C-10 contractor can install a battery based >> system >> This was news to me but they sent me a pdf outlining the issue and I will >> read it over this weekend has anyone else heard about this? >> My instant response is what special training does the c10 have that the >> c46 doesn’t ? >> Jason Andrade >> West Coast Sustainables >> >> Sent from my iPhone >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Covering modules
1. NEC 690.18 was removed from the Code in 2017 and an "opaque covering" for Installation and Service of an Array. 2. Light to the underside of the array is still an issue too for a ground-mount - albedo. Try this in sunlight on a windy day? :) I'd also suggest "treating everything as if it were hot." Martin Herzfeld, Interstate Renewable Energy Council (IREC) Certified Master Trainer ™ for Photovoltaics (PV) Installation Professional #IREC 10037 https://www.youracclaim.com/badges/a54a49a9-31cb-4f52-b35f-9 d7c90630bb9/public_url Adjunct Professor California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation Underwriters Laboratories (UL) Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #32-0105338 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Registered North American Board of Certified Energy Practioners (NABCEP) Continuing Education (CE) Provider On Dec 23, 2017 11:52 AM, wrote: I always thought this was a waste of time, waste of materials, and gives a false sense of security. I have had the crap shocked out of me while trying to hurry and finish up string connections in a combiner box when it was almost dark and could barely see so now I never assume near darkness means it’s safe on higher voltage strings. Was trying to avoid having to make another trip to finish. These days we make sure positive leg of each string is blocked off at combiner before starting the module mounting and connecting as we go. This way we always know to treat everything as if it’s hot. Sent from my iPad Jeff Yago DTI Solar. Inc. 804-457-9566 jry...@dtisolar.com > On Dec 23, 2017, at 11:04 AM, Jay wrote: > > Hi All, happy holidays. > > I’m looking for any studies or data about the dangers of “covering modules” and assuming they are safe to work on. > > I have a group that I think is going to need some harder data than me telling them it’s not safe. > > Thanks > > Jay > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.or g/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.or g/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Aquion Batteries
Has anyone worked with them with a Sunny Island? Space is not an issue for this client. Martin Herzfeld, IREC Certified Master Trainer ™ for PV Installation Professional #IREC 10037 California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation UL Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #C0068034 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Registered NABCEP Continuing Education (CE) Provider On Jul 20, 2016 2:00 PM, "Jerry Shafer" wrote: We had a customer request them but once we found out how many it would take, he decided on the deka unigee instead. l dont like running my OB's at such a low voltage as they seem to get hotter due to the higher current. Some of our other product lines don't even reccomend aquions due to that low voltage, suggest asking your inverter manufacture too. On Jul 20, 2016 10:52 AM, "Drake" wrote: > Hello Wrenches, > > I have a client who is going to take the plunge and buy a set of Aquion > Batteries. They look pretty good on paper, but I'm not sure how well an > inverter would function at the 40 V minimum. Does anyone have experience to > recommend them or warn against using them? > > Thanks, > > Drake > > Drake Chamberlin > > > > > > *Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified > Solar PV 740-448-7328 <740-448-7328> *http://athens-electric.com/ > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. > org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches. org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SMA 40 series DC disconnect
2014 NEC 690.18 is now removed in NEC 2017? Martin Herzfeld, IREC Certified Master Trainer ™ for PV Installation Professional #IREC 10037 Contract Training Provider (CTP) California Solar Contractor License #00833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation Contract PV Technical Inspector Roof & Ground Mounted Solar PV Systems Licensed Contractor & Consultant - Since 2004 BBB Accredited Business Email: m...@herzfeld.org UL Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #C0068034 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Martin Herzfeld is a registed NABCEP Continuing Education (CE) Provider On Dec 15, 2016 1:09 PM, wrote: William, I was also surprised to see SMA go down this road (ala Fronius IG). I can’t speak to why they did this. I’m installing my first 40 series right now. I have never supported covering the array as a viable method of removing voltage. It is far safer to unplug the strings on the roof if you want to remove voltage. Not sure why they did not suggest unplugging instead of tarping. Either way, many jurisdictions will require an external dc disconnect with this new configuration—what a waste. If SMA were smart, they would put connectors in their dc connection box to be compliant with the 2017 NEC which would solve their problem. It means a design change. They must be expecting this product to be connected to a rapid shutdown switch box—that’s the only thing that makes sense. Bill. *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *William Miller *Sent:* Wednesday, December 14, 2016 10:45 AM *To:* RE-wrenches *Subject:* Re: [RE-wrenches] SMA 40 series DC disconnect Bill: That is exactly my point. Carports and ground-mounts do not need RS, but any system requires safe means to disconnect DC. So how do you accomplish this with the 40 series? Sure, using the DC connector is one way to disconnect the DC input to the 40 series electronics. However, the service manual cautions against this. Below is the verbatim text from the manual. >From SMA Document SB30-77-1SP-US-40-AT-PU-SG-xx-11 Service Manual: • If an external DC disconnecting switch is available, open the external DC disconnecting switch. • If there is no external DC disconnecting switch, cover the PV modules with opaque material (e.g. foil). • Ensure that there is no voltage on the DC conductors of the PV array. • Wait five minutes before working on the inverter. • Leave the *DC-in *connecting terminal plate plugged into the Connection Unit and only touch it on the black enclosure. I was told that the term ‘foil’ is a poor translation from German, and likely means a tarp. In any event, this verbiage is quite unfortunate as it precludes using the connector as a disconnect. I wonder if there is some criteria on what kind of connectors can be used as a disconnecting means and which cannot. I am sure it has something to do with ‘touch-safe’ requirements. The DC connector in the 40 series may not meet this criteria. The external leads could possibly come free of the connector body as they are just insert-connected. I would be very reticent to send out a technician to work on one of these without some serious consideration of the implications. SMA seems like they are interested in this conundrum and I am withholding judgement pending receiving a response from them. I just thought it very curious that they moved the location of the disconnect in the DC power flow scheme. Seems to me like a fundamental change that flew under the radar. See below for a rendering of the change in DC power flow: Formerly: PV--àIntegrated Disconnectàchassis separation 40 Series: PV àchassis separation--àIntegrated Disconnect William PS: I remember wasting an entire afternoon in a conference room in San Diego arguing with Fronius about the same concept. They too insisted that to service the IG series inverter one had to just tarp the modules. Let us please put that myth to rest once and for all: Tarping modules is not viable. Wm [image: Gradient Cap_mini] Lic 773985 millersolar.com <http://www.millersolar.com/> 805-438-5600 <(805)%20438-5600> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *billbroo...@sbcglobal.net *Sent:* Wednesday, December 14, 2016 7:40 AM *To:* 'RE-wrenches' *Subject:* Re: [RE-wrenches] SMA $0 series DC disconnect William, I’m not sure you meant to imply this, but carports and ground mounts do not need any RS equipment unless you were to bring the dc conductors into a building, which would not be smart. The 2017 NEC allows connectors to be used as isolation devices for equipment as long as the circuit current is below 30 amps, which it always is on individual strings. I realize California will not be on t
Re: [RE-wrenches] traveling with digital meters
I typically travel in the US and I carry on my meters by placing them in a separate bag all together in a separate bin. 1. "When in doubt, leave it out" as found here: http://www.tsa.gov/data/guide/PackSmart.html 2. By the way, on my most recent trip, a passenger sat next to me knitted with knitting needles. All the best, Martin Herzfeld, IREC Certified Master Trainer ™ for PV Installation Professional #IREC 10037 California Solar Contractor License #833782 C46, D56, D31, C-7 Solar, Trenching, Pole Installation & Maintenance, Instrumentation Roof & Ground Mounted Solar PV Systems Licensed Contractor & Consultant - Since 2004 Contract PV Technical Inspector BBB Accredited Business UL Certified PV Installer #17, OSHA 30 OSHA-Authorized Construction Trainer #C0068034 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG NABCEP Advanced Continuing Education (CE) Training Provider for Certification and Recertification Classes in Solar (PV) Technology On Nov 9, 2015 4:40 PM, "Dan Fink" wrote: > Hi Jay - I was busted for the probes in Canada. Too sharp. Fortunately it > was a tiny airport and my checked bags were right outside on the tarmac, so > the nice Air Canada lady went out and put the probes in. > So now I check the probes, and carry on the meter. > > Dan Fink > Adjunct Professor, Ecotech Institute > IREC Certified Instructor™ for: > ~ PV Installation Professional > ~ Small Wind Installer > Executive Director, Buckville Energy > NABCEP Accredited Continuing Education Providers™ > 970.672.4342 > > > > On Mon, Nov 9, 2015 at 4:49 PM, jay wrote: > >> Hi All, >> >> I believe this was talked about in the past, but I can’t find it. >> >> I’m going to be traveling out of the country with a clamp on w/probes >> >> And curious if I should/can check this or carry it on? >> >> thanks >> >> jay >> >> >> ___ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] UL 1703 coming to California
FYI - Also additional information is here too ... : http://productspec.ul.com/ <http://productspec.ul.com/index.php> Martin Herzfeld California Solar Contractor License #833782 C46, C-7, D31, D56 Trenching Contractor, Pole Installation & Maintenance, Instrumentation UL Certified PV Installer #17, OSHA 30 Principal Contract Solar Technical Inspector OSHA-Authorized Construction Trainer #C 0068034 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Project Contractor & Consultant Telephone & Text: 510.243.0190 August, Here's some additional info: http://solarprofessional.com/articles/design-installation/fire-classification-for-roof-mounted-pv-systems?v=disable_pagination Best regards, David Brearley Senior Technical Editor, *SolarPro* magazine NABCEP Certified PV Installation Professional david.brear...@solarprofessional.com Direct: 541.261.6545 Check out this AMAZING music video tribute to SolarPro: http://bit.ly/1qfMCCh On Dec 9, 2014, at 7:50 AM, re-wrenches-requ...@lists.re-wrenches.org wrote: > > > > > > > > > > > > > Send RE-wrenches mailing list submissions to > > > > re-wrenches@lists.re-wrenches.org > > > > > > > > To subscribe or unsubscribe via the World Wide Web, visit > > > > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org <http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org> > > > > or, via email, send a message with subject or body 'help' to > > > > re-wrenches-requ...@lists.re-wrenches.org > > > > > > > > You can reach the person managing the list at > > > > re-wrenches-ow...@lists.re-wrenches.org > > > > > > > > When replying, please edit your Subject line so it is more specific > > > > than "Re: Contents of RE-wrenches digest..." > > > > When responding to posts within the Digest, be sure to restore the Subject: line to the original, and please edit out any extraneous lines from the quoted message. > > > > Today's Topics: > > > > > > > > 1. UL 1703 coming to California - anyone ready? (August Goers) > > > > 2. Re: UL 1703 coming to California - anyone ready? (August Goers) > > > > 3. Re: UL 1703 coming to California - anyone ready? (Glenn Burt) > > > > 4. Re: Magnum Back Plates (Baxter, Gary) > > > > *> > > > From:* August Goers *> > > > Subject:** [RE-wrenches] UL 1703 coming to California - anyone ready?* *> > > > Date:* December 8, 2014 5:07:54 PM CST *> > > > To:* RE-wrenches *> > > > Reply-To:* RE-wrenches > > > > > > > > > > > > Hi All California Wrenches, > > > > > > > > > > > > > > > > As far as I understand, UL 1703 goes into law in California on Jan 1, 2015 and will require new fire rating classifications for many projects. Is anyone else currently planning what racking and modules they will be using to meet these requirements? I’ve been trying to get my head around this for a while now and I’m having a hard time finding substantial information from both racking and module manufacturers. > > > > > > > > > > > > > > > > A little info: > > > > > > > > > > > > <http://osfm.fire.ca.gov/informationbulletin/pdf/2014/IB14002PVFireClassification.pdf> > > > > http://osfm.fire.ca.gov/informationbulletin/pdf/2014/IB14002PVFireClassification.pdf <http://osfm.fire.ca.gov/informationbulletin/pdf/2014/IB14002PVFireClassification.pdf> > > > > > > > > > > > > > > > > Best, > > > > > > > > > > > > > > > > August > > > > > > > > > > > > > > > > Luminalt > > > > > > > > > > > > > > > > *> > > > From:* August Goers *> > > > Subject:** Re: [RE-wrenches] UL 1703 coming to California - anyone ready?* *> > > > Date:* December 8, 2014 6:48:34 PM CST *> > > > To:* RE-wrenches *> > > > Reply-To:* RE-wrenches > > > > > > > > > > > > All – > > > > > > > > > > > > > > > > Bill Brooks wrote back to me and shared a draft NREL whitepaper on fire performance of PV systems he wrote. If you are interested, please contact me off list and I will share it with you (he said it was okay to share). > > > > > > > > > > > > > > > > Best, > > > > > > > >
Re: [RE-wrenches] PV panel backing
I concur with Dan. Unless a controlled environment, a patch job on a module with a customer is wrong on so many levels. Martin Herzfeld California Solar Contractor License #833782 Trenching Contractor, Pole Installation & Maintenance, Instrumentation UL Certified PV Installer #17, OSHA 30 Principal Contract Solar Technical Inspector OSHA-Authorized Construction Trainer CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG Project Contractor & Consultant Telephone & Text: 510-243-0190 Ron, It's been my experience the only adhesives that work reliably on PV backsheets are those designed for the purpose, such as Dow 804 et. al.. Substances such as silicone sealant, tool polymerics, and others will appear to be suitable when first applied, but they eventually peel loose over a period of 1-5 years. Issue #2: Heat of sufficient temperature to melt the backsheet may also have been hot enough to affect solder joints on and among the cells. Crystallized solder connections will conduct current, but are more resistive, and eventually will degrade due to heating and cooling, leading to overheating and eventual failure. Then too there's a possibility of micro-fractures created in the cells due to the heat, which take time to become apparent, but will also cause a PV module to quit working .. or at least quit working at its rated specifications. Issue #3: When PV are manufactured, the layers at a minimum are manufactured from tempered glass, EVA, cells and buss, EVA, then the backsheet (tedlar, kevlar, etc.), in that order. The module is assembled under conditions of heat and vacuum. With the backsheet melted, the environmental integrity of the laminate has been compromised, allowing ambient humidity into the PV. While it may be functional now, long-term prospects for continued proper operation are questionable at best. Unless there's a pressing reason to try to salvage the module, it's better to replace it. Dan Lepinski On Sun, 8/31/14, Ron Young wrote: Subject: [RE-wrenches] PV panel backing To: "RE-wrenches" Date: Sunday, August 31, 2014, 6:32 AM Hello Wrenches, I have an installation of 165w PV on a pole mount that was exposed to a fire from the rear when the customers shop burned. 6 of the 10 panels survived with only replacement of the MC4 plugs required but one of the panels that is still functioning had the rear coating melted off. The cells and electrical grid still function. Can anyone recommend a replacement coating that may salvage this panel for a few more years. I know if left exposed it will soon deteriorate but am wondering if some kind of commonly available non conductive rubberized or latex type of coating might do the job? Ron Young ___ List sponsored by Redwood Alliance List Address:RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Rapid shutdown for pole mounts
In other words, for ground-mounts, in accordance with 2014 NEC 690.12(1), would it be okay to run the DC conductors not inside, but on the side of the building "5" feet directly to the inverter? Martin Herzfeld California Solar Contractors License #833782 Trenching Contractor, Pole Installation and Maintenance, Instrumentation UL Certified PV Installer #17, OSHA 30 CompTIA Certified Technical Classroom Trainer (CTT+) #T3NSZCNBBKB4QTQG OSHA-Authorized Construction Trainer Telephone & Text: 510-243-0190 Martin Herzfeld is an Accredited Business of the BBB since 2008. Aaron, An exterior utility service panel with an underground service lateral is not considered in or on the building. Keep the dc conductors off of the building and you will be fine with a ground-mounted PV system. Don't bring them inside the building, and don't run them along the exterior of the building. The whole requirement is to deenergize conductors that a firefighter might come in contact with while fighting a fire. The most important conductors are those inside the building. A PV array on top of a buiding is also required to deenergize the conductors within 10 feet of the array (PV Output Circuit Conductors). The array is allowed to remain at full voltage. Bill. -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Aaron Mandelkorn Sent: Friday, April 18, 2014 1:35 PM To: RE-wrenches Subject: [RE-wrenches] Rapid shutdown for pole mounts The rapid shutdown language is so confusing. When looking at the rapid shutdown language, does PV systems "on" a building refer to only situations where the array is on a building; or does it include DC conductors as well. For example, if the DC conductors from a pole mounted array run up the side of a building before punching in to the inverter, does this require rapid shutdown? Is this PV system considered "on" a building? Aaron Aaron Mandelkorn Owner/Solar Specialist Renewable Energy Outfitters 719-221-5249 970-596-3744 www.reosolar.com reoso...@gmail.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] CA Fire code
1. In addition to the thoughts shared, for instance, for one AHJ: (A) I think "Photovoltaic Installations west of Interstate 280 require PV modules to have a minimum Class A fire rating" - requirements and 'additional information' since 2009 were revised and updated here ...? http://www.cityofpaloalto.org/gov/depts/utl/residents/resources/pcm/pv_permitting_and_interconnection.asp (B) Also ground-mount options - not only just rooftops - CSFM Guidelines Section 5.0, ... http://www.cityofpaloalto.org/civicax/filebank/documents/34052 http://osfm.fire.ca.gov/informationbulletin/pdf/2012/IB_12-004_FireApparatusAccessRoadsPhotovoltaicFacilities.pdf http://osfm.fire.ca.gov/training/pdf/Photovoltaics/Fire%20Ops%20PV%20lo%20resl.pdf You may first check with the specific jurisdiction for more information ... 2. In addition, you may want to join or attend the IAEI meetings in California, there's good information on this and other topics at the monthly meetings and CEUs. http://www.iaei.org 3. By the way, I attended at the very last stakeholder meeting in SF and the publications here for new changes and updates ... http://www.solarabcs.org/about/publications/reports/flammability-testing/index.html 4. Wildland Hazard/Building Codes http://www.fire.ca.gov/fire_prevention/fire_prevention_wildland_zones.php We'll check it out on an install, if in the area ... Martin Herzfeld California Contractor License #833782 UL Certified PV Installer #17, OSHA 30 Certified Technical Classroom Trainer (CTT+) OSHA-Authorized Construction Trainer Wrenches, If you are in a wild land fire zone in CA, it looks like we are all in for a rude awakening. Our local AHJ is requiring not only set backs for ventilation of roofs, but also THAT ALL PANELS ON THE ROOF CARY A CLASS A FIRE RATING! It doesn't take allot of research to realize that this pretty much eliminates roof-top solar as an option, as if you can eve find a class A panel, they are cost prohibitive. I'm wondering a couple things. One, has anyone had luck using the local political process to postpone the enforcement of the class A requirement? and two, has anyone found readily available Class A modules? This issue seems to have caught the industry with it's pants down, as industry lobby doesn't even seem to be aware that the the local AHJ's would have this interpretation. Is this the end of roof top solar in 60% of California? What are y'all doing to deal with this issue? -- Lars Ortegren President California Solar Electric Company .PO Box 480 149 E.Main St Grass Valley, CA 95945 Phone : (530)274-3671 Fax: (530)274-7518 California C-10 Electical Contractor #779624 Certified NABCEP Continuing Education Provider Certified NAPCEP Technical Sales and Installation Profesional ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Advanced PV Training Recommendations
By the way, I think there was also input to the UL PV Installer Certification announced here: http://lms.ulknowledgeservices.com/common/ncsresponse.aspx?rendertext=pvinstaller_pressrelease On Apr 23, 2013 8:34 AM, "Andrew Truitt" wrote: > > Eric - Check out IREC's Solar Instructor Training Network > (SITN)<http://www.sitnusa.org/>. > They also have an associated free on-line companion course geared towards > code officials called the Photovoltaic Online Training Course > (PVOT)<https://www.nterlearning.org/web/guest/course-details?cid=402>. > The PVOT course was developed by IREC with input from Brooks Engineering. > > > For a brighter energy future, > > > Andrew Truitt > NABCEP Certified PV Installation Professional™ (ID# 032407-66) > > Principal > Truitt Renewable Energy Consulting, LLC > > (202) 486-7507 > > LinkedIn Profile <http://www.linkedin.com/pub/andrew-truitt/8/622/713> > > Company Website <http://truittreconsulting.weebly.com/> > <%28202%29%20486-7507> > > > > > "Don't get me wrong: I love nuclear energy! It's just that I prefer fusion > to fission. And it just so happens that there's an enormous fusion reactor > safely banked a few million miles from us. It delivers more than we could > ever use in just about 8 minutes. And it's wireless!" > > ~William McDonough > > > > > > > > On Mon, Apr 22, 2013 at 3:10 PM, Martin Herzfeld > wrote: > >> "But, as you all know, there are always more details to master, code >> issues to be clarified, and new technologies coming down the pike." >> >> 1. Specifically, not only practical safeguarding code issues, but also >> the I codes and standards, - CEC, CBC, ... there are courses with the ICC >> 2013 TriChapter IAEI Events which included advanced fire-stopping, >> PV plan-check and permitting workshops and updates, CalGreen code,Energy >> ... >> >> 2. There are other options with certification - or 'feathers' in the ANSI >> Z89 hardhat. In California, you are required to have a contractors license >> in accordance to B&P code - if not this happens - >> >> 3. In other words, the license is the hat and certification is the >> 'feather.' The license itself is also certification. >> >> 4. With an OSHA 30 certificate, I'd suggest also adding some new feathers >> for OSHA safety health and environmental specifically applicable to our >> trade: http://osha4you.com/courses/osha-courses-by-industry "Hands-on >> and hands-off" construction courses at Sacramento at the safety center. The >> trainers have more than 25+ years of experience. >> >> 5. There's also the UL PV Installer Certification with the International >> Brotherhood of Electrical Workers (IBEW), offering UL's Photovoltaic (PV) >> Installer Certification to IBEW members and the National Electrical >> Contractors Association (NECA) - may be difficult to qualify and complete - >> I think there are now more than 30 + >> >> 6. Some differences in the certification models as discussed here: >> http://nti.njatc.org/Portals/3/C%20Group/2012%20NTI%20UL%20PV%20Certification.pdf >> >> 7. By the way, if you are looking for an Advanced Photovoltaics Course in >> Sacramento 3 days for free ~$0.00? I'd suggest consider >> https://usage.smud.org/etcstudent/ClassDescription.aspx?Id=814 this year >> with Bill Brooks of Brooks Engineering? >> >> 8. I agree - there's more to a license and certification than submitting >> a writing sample. >> >> > >> The MREA (Midwest renewable energy association) offers classes, some >> on-line now. Really good Instructors. >> >> www.midwestrenew.org >> >> Jesse >> >> Sent from my iPhone >> >> On Apr 12, 2013, at 8:03 PM, jay peltz wrote: >> >> > HI Eric, >> > >> > I'm going to advise you to look at SEI >> > Solar energy international. >> > >> > http://www.solarenergy.org/ >> > >> > Full disclosure, I teach part time from them. >> > >> > Cheers, >> > >> > jay >> > >> > peltz power >> > >> > On Apr 12, 2013, at 12:46 PM, SunHarvest wrote: >> > >> >> Wrenchers - >> >> >> >> I am in need of hands-on advanced training for my own continuing >> education. I have a California C46 solar contractor's license and plenty of >> experience designing and installing systems. But, as you all know, >
Re: [RE-wrenches] Advanced PV Training Recommendations
"But, as you all know, there are always more details to master, code issues to be clarified, and new technologies coming down the pike." 1. Specifically, not only practical safeguarding code issues, but also the I codes and standards, - CEC, CBC, ... there are courses with the ICC 2013 TriChapter IAEI Events which included advanced fire-stopping, PV plan-check and permitting workshops and updates, CalGreen code,Energy ... 2. There are other options with certification - or 'feathers' in the ANSI Z89 hardhat. In California, you are required to have a contractors license in accordance to B&P code - if not this happens - 3. In other words, the license is the hat and certification is the 'feather.' The license itself is also certification. 4. With an OSHA 30 certificate, I'd suggest also adding some new feathers for OSHA safety health and environmental specifically applicable to our trade: http://osha4you.com/courses/osha-courses-by-industry "Hands-on and hands-off" construction courses at Sacramento at the safety center. The trainers have more than 25+ years of experience. 5. There's also the UL PV Installer Certification with the International Brotherhood of Electrical Workers (IBEW), offering UL's Photovoltaic (PV) Installer Certification to IBEW members and the National Electrical Contractors Association (NECA) - may be difficult to qualify and complete - I think there are now more than 30 + 6. Some differences in the certification models as discussed here: http://nti.njatc.org/Portals/3/C%20Group/2012%20NTI%20UL%20PV%20Certification.pdf 7. By the way, if you are looking for an Advanced Photovoltaics Course in Sacramento 3 days for free ~$0.00? I'd suggest consider https://usage.smud.org/etcstudent/ClassDescription.aspx?Id=814 this year with Bill Brooks of Brooks Engineering? 8. I agree - there's more to a license and certification than submitting a writing sample. > The MREA (Midwest renewable energy association) offers classes, some on-line now. Really good Instructors. www.midwestrenew.org Jesse Sent from my iPhone On Apr 12, 2013, at 8:03 PM, jay peltz wrote: > HI Eric, > > I'm going to advise you to look at SEI > Solar energy international. > > http://www.solarenergy.org/ > > Full disclosure, I teach part time from them. > > Cheers, > > jay > > peltz power > > On Apr 12, 2013, at 12:46 PM, SunHarvest wrote: > >> Wrenchers - >> >> I am in need of hands-on advanced training for my own continuing education. I have a California C46 solar contractor's license and plenty of experience designing and installing systems. But, as you all know, there are always more details to master, code issues to be clarified, and new technologies coming down the pike. I'd like to focus on off-grid and on-grid w/BB systems over straight grid-tie. >> >> I'm looking at Solar Living Institute as that's here in NorCal, where I live. >> >> Are there any training schools/programs that you guys would recommend? >> >> My main requirements are that the instructor has 20+ years of hands-on experience and that the training is hands-on and fully comprehensive. I am interested in getting NABCEP certified but I'm more concerned with getting professional, in-depth training than with qualifying for NABCEP exam requirements. >> >> Thanks! >> >> Eric >> SunHarvest >> >> >> - Original Message - >>> >>> From: John Berdner >>> To: RE-wrenches >>> Sent: Thursday, April 04, 2013 11:44 AM >>> Subject: Re: [RE-wrenches] Combining conductors >>> >>> Larry: >>> >>> Yes, you can parallel conductors (there is an NEC limit on minimum size allowed to parallel). >>> You just add the ampacity of the two conductors. >>> To convince yourself you can also check Table 8 Conductor Properties and sum the cross sectional areas of all the parallel conductors to see the equivalency to a single larger conductor. >>> >>> Best Regards, >>> >>> John Berdner >>> General Manager, North America >>> >>> SolarEdge Technologies, Inc. >>> 3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.) >>> T: 510.498.3200, X 747 >>> M: 530.277.4894 >>> >>> From: re-wrenches-boun...@lists.re-wrenches.org [mailto: re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry Crutcher, Starlight Solar Power Systems >>> Sent: Thursday, April 04, 2013 9:51 AM >>> To: RE-wrenches >>> Subject: [RE-wrenches] Combining conductors >>> >>> Wrenches, >>> >>> Here's a tough one for me to understand. I am installing 2 volt AGM batteries. There are two terminals for each battery polarity. I have some height limits so I need to use the minimum wire size. Here's my question: If I combine two identical conductors, what is the equivalent single conductor size? >>> >>> I found one "rule of thumb" that says doubling like conductors creates a AWG decrease of 3. Example: two #2 will be equivalent to 2/0. Is this true? >>> >>> Thank you, >>> >>> Larry Crutcher >>> Starlight Solar Power Systems >>> >>> >>> >>> >>> >>> >>> CONFIDENTIALITY NOTICE: This e-mail and
Re: [RE-wrenches] AHJ's & NABCEP
They are different. 1. The license distinguishes the qualified from the unqualified and the license qualifier is allowed to practice in the jurisdiction. A qualified person is also defined in NEC Article 100. The definition of AHJ may not be as many think as defined in NEC Article 100. 2. As an employee is different from an independent contractor, the certification resources may become one set of resources to study to qualify for a license. 3. Some states are different than others. http://www.nascla.org/licensing_information 4. However, other certifications provide further distinction as the qualifier. There's another certification targeted to contractors, ... martinHerzfeld California Licensed Solar Contractor #833782 UL Certified PV Installer #17 CTT+ Certified Trainer On Feb 2, 2013 5:23 PM, "Maverick Brown" wrote: > > I would go by state law. > > I'll be frank. NABCEP and licensed electrical work are almost incongruous, > but are certainly separate. > > I am closer to being an electrician and will be glad when my electrical > engineering degree and NABCEP cert will be useful. ;-) > > I hope the future will have NABCEP working with states to better integrate > the knowledge of solar with electrical work. > > > Thank you, > > Maverick > > > Maverick Brown > BSEET, NABCEP Certified Solar PV Installer ® > President & CEO > Maverick Solar Enterprises, Inc. > Office: 512-919-4493 > Cell:512-460-9825 > > Sent from an iPhone. > > On Feb 2, 2013, at 6:15 PM, Ian Eastman wrote: > >> Hi Re-wrenchers, >> Does anyone know where to find some good information on talking to your >> local AHJ concerning using the NABCEP cert. for a Solar Contracting License? >> Arguments, facts...? >> Thanks, >> Ian >> >> -- >> Ian Eastman | Installation/Project Management >> GO SOLAR! >> Cell: 307.413.6789 • i...@cesolar.com >> Creative Energies >> Victor, ID office 208.354.3001 >> Lander, WY office 307.332.3410 >> Salt Lake City, UT office 801.487.6489 >> www.CreativeEnergies.biz >> >> ___ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > > ___ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
