[RE-wrenches] SolarEdge optimizers require amp deration?
Hi, Wrench List colleagues~ I have a minor dispute with a technician at one of the solar superstores. He says the amp rating on SolarEdge optimizers needs a 25% "safety factor". SolarEdge's spec sheet says "Maximum Output Current" for model S500 is 15 amps. I'm not sure if the technician would take 25% off the 15a or if he boosts the Isc amps (on the PV datasheet) by 25%. In one case, his allowable short circuit amps (from the datasheet) would be 11.25a and in the other case it's 12a. If he's right, this "500 watt optimizer" could only process 500 watts in an unusual combination of Vmp and Imp. I know the PV's open circuit voltage should be calculated higher based on the lowest possible cell temperature, but I can't find any SolarEdge reference materials that address the amperage. I checked the SolarEdge videos, installation documents, and I even spent time in voicemail perdition. Their design tool at designer.solaredge.com did suggest the S500 optimizer after I entered all the parameters for my preferred module. Nothing else from SolarEdge so far...so it's Wrenchie time. It would be especially helpful if someone has a white paper or other document to clear this up. I'm pretty sure the technician wrong on this point, but I'd like to offer more than just my opinion. BTW, the PV's that I'd like to use are 450 watt monocrystalline, two strings of 54 cells and 14.55 amps short circuit current. The relatively low cell count does translate into higher amps per rated watt compared to a module with more cells in series. Thanks as always; the Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] eGauge login info for Blue Planet owners
Hi, Mechanics~ Blue Planet gave us a whole three days notice before shutting down their customer facing web monitor. The handy BPE_eGauge Guide .pdf file to help with our transition failed to include the username & password that end users need in order to get their data direct from eGauge. If any of the Wrenchies need this for their installed customer base, contact me off list. The Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Redundant gensets: Must I switch the neutral in the manual transfer switch?
Hi, Mechanix~ My off grid project gig has redundant 120y208 generators that need a 200a "break before make" manual transfer switch so the clients can choose machine A or machine B. The switch has a lockable center-off but I think the generators aren't set up for "lock out tag out". The machines & the xfer switch will all be indoors and about 10 feet apart. The AC power wires from each generator will be hard-wired to the transfer switch & piped in EMT. I had planned for the transfer switch to have a "solid neutral" bus bar (& I had planned to bond Neutral to Ground in that box), but a consulting EE tells me the neutral must be switched along with the three hots. The project is too remote to have an AHJ, but the clients have requested a wet stamp from the EE. I think his rationale is related to the N-G bond point location. When I asked about his suggested location, the EE wrote: "The N-G bond will be at each generator, so the neutral will be generated at the generator providing power to the facilities." Mick resumes: The genset installation document says "The generator set is shipped from the factory with the neutral and equipment ground not bonded together." So...these gensets are not like those portables where it's difficult to isolate the neutral. I've attached an image that shows what the EE is advocating. The manual xfer switch that I wish to use isn't made in "four poles" without going to the 400 amp version and the 400a switch won't physically fit the available space. Can I make a credible case for the transfer switch being the "point of first disconnect" instead of each generator taking turns at being the POFD? If the transfer switch is also the bond point, can't the Neutral from each generator happily meet at the neutral bus bar? OR: might the EE have a concern about a loop (from the Neutral of one genset through the bus bar then showing up on the terminal strip for the other genset? Code citations would be appreciated along with your advice, Wrenchies. During service intervals, both engines will be running for a brief interval. Example: Gen A may be carrying the loads while the mechanic manually runs Gen B as he completes an oil change. If I wire it as the EE wishes, will both running machines play well safety-wise if each genset has a N-G bond (with the equipment ground as their only common connection)? How would the safety aspects change if both machines are running but I've wired things per my original concept? Thanks as always, Mechanix. "The Wrench List is the Bomb!" Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] State of Charge Meter for Sol-Ark
Me again, Mechanics, with some corrections to my recent post. Solar Assistant may not be a US based provider. They publish pricing in US dollars but I was unable to log in or create an account. Watts247.com claims to be the only authorized US distributor. https://watts247.com/product/solar-assistant-remote-monitoring-mpp-solar-growatt-deye-sol-ark-sunsynk-and-many-bmss/ but their pricing pushes the system cost well above the cost for a TriMetric. I apologize for uploading wrong/incomplete information before, thanks. Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] State of Charge Meter for Sol-Ark
~ This is yet another worthwhile topic with the Mechanics ~ Chris Mason wrote: "If you know someone who can set up a little raspberry pi with a display, you try this script. It's called solark-modbus." I did a google for Solark "raspberry pi" & the first link took me to this: https://solar-assistant.io/explore/solark For an amateur like me, getting the hardware and software from Solar Assistant has a lot of appeal, even if it costs more than a home brew setup. How 'bout that "single source accountability"? Original poster Jason Szumlanski may appreciate the video that I've linked below. The video creator connected a touch screen display directly to his Solar Assistant box: https://www.youtube.com/watch?v=wXOVVMOGfNM I may try the S-A bundle with an EG4 battery for some off gridders in crisis. Their old Outback system doesn't even have a TriMetric monitor, but for about the same price as a TM-2020, we could get the SOC data, etc. directly from the BMS. I'd use the client's computer instead of a touch screen to keep the cost down. Acknowledged (to William Miller's point) the data would be no better than what the BMS can deliver. "Any port in a storm," however, and my new friends off the grid are in a terrible storm. As always, "The Wrench List is the Bomb!" Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Dab Esybox Mini 3 pump
Hi, Dave Angelini & All~ Dave posted his usual thoughtful remarks, reminding us that "Murphy" of the infamous law is...everywhere... My reply is below his remarks, thanks. "No experience but I am interested. I see your pump but it has not been out there long. I can't find it a Home Depot which I depend on for really remote clients. Can you get one fixed in the US or parts? Will it be affected by well water? The Scala2 has had failures and seems to last 3 years if the input water has sediment. Grundfos is a pain but they are there and will help for 2 years. Home Depot will give your money back if you use their CC for a year. All ears on this one!" Mick replies: I think the "home office" is in Italy & the earliest youtube video on the Esybox Mini was in 2015...so it does have some track time. They call it Mini3 now because they've changed to three vanes in the pump. Here's the contacts page for DAB USA for the intrepid seekers among us: https://dabpumps.us/en/CONTACTS A home sized pressurizing pump with updateable firmware--is that a good thing? But I digress. I gotta hold back on this until/unless there's more feedback from success stories in the field. I'm too old to continue my "earlier adopter" ways. "Do you know how to tell who the pioneers are? They're the ones with arrows in their back." Thanks, Dave, for your always helpful participation. The Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Dab Esybox Mini 3 pump
Hi, Mechanics~ Any experiences with the pump in my subject line? It's variable speed (constant pressure) in a similar category as Grundfos Scala2. I see the Scala2 has garnered some bad reviews for leakage problems, etc. The Esybox Mini seems to mostly have 5 stars. I'd be using it with an unpressurized holding tank, & prolly I can arrange for flooded suction. Thanks in advance. The Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Fronius USA available 2023 & 2024 ?
Hi, Team and >>gosh<< I must apologize to connell.christop...@fronius.com and to Fronius. I'm sorry that I inadvertently fueled an untrue rumor about Fronius USA. Chris, I should have tracked you down for the correct answer before putting my question on the List. I will also correct this with my Greentech branch manager on Monday, Heaven permitting. I freaked out when my Greentech rep told me Fronius had left the building but I'm glad I don't have to re-shop the string inverter component after all. I did an AC coupled off grid project using Fronius Symo in 2019: No Drama, No Trauma. For those Wrenches who've wondered, "Why, Mick, why..." about off grid AC coupling: most of the rooftops that need PV for my 2023 opportunity will be inconvenient for running DC wires to the battery location. These same rooftops, however, will have AC sub-panels close by, so I had an "A-ha, negative loads!" moment. At least some of the PV will run through a charge controller in any case. I think the wattage from any AC coupled string inverters won't show up on Schneider Insight, so that's another reason for me to heed those Wrenches who suggest DC coupling for all of the PV. Thanks to all who've contributed to this thread. I think the thread should now extinguish & moderator Michael may wish to delete it from the archives. I appreciate accessing the "hive mind" on various 2023 PV inverters and again, Chris, I'm sorry to have caused a temporary smudge on Fronius USA. The Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Fronius USA available 2023 & 2024 ?
Hi, Mechanix~ I asked a Greentech location about quantity four Fronius string inverter PRIMO 6.0-1. (6kW AC output, single phase 240 volt 60 hz) This p/n is in the Greentech portal but my particular branch hasn't done much with Fronius. Today the branch manager told me "Fronius no longer exists." Can any of you confirm or correct this report? I have an off-grid opportunity for which I wish to AC couple some of the PV. If Fronius USA has indeed "left the building", are there other string inverters that can be selected for country code "off grid 60 hz"? I'd like for the PV inverters to only curtail their output wattage if there's a frequency shift from the grid forming inverter (frequency/watt). Schneider XW Pro units would be forming the grid. Schneider has a white paper # 990-6421 on AC coupling but this document is almost three years old & no help at all in finding compatible PV inverters. Rapid shutdown is not mandated for this gig & each array would be evenly illuminated. IIRC, the List hasn't been highly enamored with SolarEdge in recent years; is that still the consensus? Thanks as always; the Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] 200a manual xfer switch w/ small aux contact : who makes it?
Hi, Mechanix~ My off grid project needs dual 40kW diesel generators with easy manual selection between "A" or "B". The output from the manual switch would feed AC into a set of XW Pro inverter/chargers. I seek a 200a manual xfer switch that can also changeover the 12v+ generator automation wire with the same handle. Schneider DTU324N is 3 phase (solid neutral) so that does get me a third blade but since the trigger wire is only a few amps this p/n seems like overkill on size/weight and on cost. The manual switch unit doesn't need to make or break live power because folks always tend to shut down any nearby noisy engine before they do any switching. We also don't need 100k short circuit current rating because the machines can't fault as big as grid power can. Non-fusible seems best b/c each genset will have a 200a main breaker. I'd prefer to buy the switch inside a NEMA1 enclosure rather than getting a bare switch that would require me to mount it into a housing. The project won't be code inspected, so thanks in advance for any suggestions. The Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Outback Mate3SL = no web monitor due to a chip shortage
Hi, Mechanix~ Is the Mate3S in short supply for mid to late 2023? I see there's a "Lite" version with no internet capability--but are enough projects buying the Lite so those who want the full version can still get it from inventory? Thanks in advance; the Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Web based system monitoring via 4GLTE uplink?
Hi, Mechanix~ Web portals such as Optics-RE make for easy well-baby visits for off gridders. The prospective customers that I met yesterday aren't here full time so they may not want to commit $1200/year on satellite internet service, but the Verizon 4G signal is strong at the homesite. Which web-enabled battery based inverter platforms have a dongle for 4G LTE? I know we'd need a data type SIM card & I'd need to live with a slow refresh rate so the SIM wouldn't need data replenishment too often. This wouldn't be as good as if the site had real broadband, but maybe still better than nothing. So far, I've only found this type of accy with the Victron platform: their model GX LTE. Among the other platforms & hybrid inverters I've found next to nothing, but "the Wrench List is the Bomb" at knowing things that I don't. Any suggestions would be welcomed. Thanks in advance, Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
[RE-wrenches] Lithium upgrade when Magnasine goes to float too soon
Hi, Mechanix~ I have several local clients with various different versions of Magnum pure sine inverters & all of the inverters seem to transition to the float stage soon after the charge cycle begins. I've observed this even when the inverters & batteries were brand new. I'm aware of the menus about adjusting the bulk time duration but even adjusting that to the longest setting never helped. Since these clients are all off grid with no generator automation, I just tweaked the float voltage to match the bulk voltage then instructed the clients to turn off their generator when the target voltage appears on their display. The batteries were always lead acid floodies. Now that some of these clients need better batteries (& I hope they can afford transitioning to lithium), are there any mfr's for drop in replacement lithium which don't care if the gen-powered charger can't shift downward for the float voltage? The customers' PV chargers all have a float function that does work right. I know that Blue Planet suggests 55.2v DC for all charge stages, but my Magnum systems are all either 12v nominal or 24v nominal, so I'll need to find a different brand that builds the lower voltage batteries. The clients can still shut down the generator when the target voltage is reached, but what if they fail to shut down soon after the setpoint is reached? I wouldn't want to put anybody's battery warranty at risk due to this strange charging quirk. Also, I'd like to know if any other Wrenchies have noticed this peculiarity with the Magnum inverters. Thanks in advance; the Wrench List is The Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Underground fault finder
Hi, Wrenchies~ Drake Chamberlain asked about renting a gadget to locate the point where an underground wire is broken. In my local region, the fellow who does "call before you dig" wire location services for the local power company is allowed to freelance in his off hours, using the instruments in his work vehicle. I think his particular setup is able to pinpoint the location of a wire break. Drake, it might be worth calling to see if this is an option for your project. The Wrench List is The Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] cable trays and battery cable
Hi, Mechanix~ Kirk Herander asked about cable trays & basing the wire calculations as if the wires are in "free air". The 2023 Article 100 definition of Free Air is unchanged from the 2020 NEC: 2023: "Open or ventilated environment that allows for heat dissipation and air flow around an installed conductor." However at the 2020 sessions for CMP6 Code Making Panel 6, the original draft language was: 2020 first draft: "Open or ventilated environment that allows for air flow around an installed conductor with no other conductors closer than one cable diameter and no insulation or building materials in contact with the conductor insulation for more than 75 mm (3 in.) for every 3 m (10 ft) of conductor." This is not the letter of the law since it was changed in the second draft but it does show the thinking process. I specified some cable tray recently which was "solid" on the sides & bottom (unlike some other types that are perforated or ladder style). This tray was for AC wires & the electricians did support the wires so there's ~ one cable diameter of air space around each insulated conductor. There's no forced air ventilation on this project; only natural convection via the open top of the trays. The wires were sized for "free air" conditions & there was no pushback from the AHJ. As with so many cases, this goes to the individual AHJ's interpretation, but the air-gaps seem more appropriate (compared to laying the wires in a heap) if one wants the installation to be interpreted as "free air", especially when the tray sides & bottom surface are solid as in this example. I hope this will be helpful; the Wrench List is the Bomb! Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Ideas and racking systems for "stowing" ground mount PV array during snowy winter?
Hello, Blake Gleason & All the Mechanix~ Travis Jordan astutely suggested "David Katz's single row system on 4" posts, it would tilt to vertical and only be one mod high in portrait." Mick here: If the site would accommodate something as wide & low as what Travis described, you might ask Array Technologies if they can still furnish their DuraRack AT "adjustable tilt" mounts. These resemble their single axis Duratrack trackers, but without the automation electronics. Each one can mount 12 to 16 modules laid out like playing cards side by side. Seasonal tilt adjustment is handled by a geared down linear actuator which in turn is driven by a cordless drill. Maximum tilt is 60 degrees from horizontal; maybe that's steep enough or maybe not in Blake's extreme jobsite. I never had a suitable customer to match up with this solution, so I have no direct experience with it. It might be worth a phone call to Albuquerque 505.881.7567. As always, "The Wrench List is the Bomb!" Mick Abraham, Proprietor www.abrahamsolar.com Landline: 970-731-4675 Cell phone or for text messaging: 970-946-6584 ᐧ ___ 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 List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
