Re: [RE-wrenches] Relay Driver
Just run it from a 12 volt power supply. Or use it to switch a relay and that relay's contacts can switch the 12V. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Mon, Jun 24, 2024 at 9:49 AM Drake Chamberlin via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hello, > > Does anyone know of a relay driver that would be work like the Morningstar > Relay Driver, except that it would output a 12V DC signal, rather than > battery voltage? > > Actually, it could put out 12V - 24 V AC, or 120 or 240 V AC. 12 V DC > would be optimal. > > Thank you, > > Drake > > > *Drake Chamberlin* > > *Athens Electric LLC* > > *Ohio Electrical Contractor’s License 44810* > > *NABCEP Certified PV Installation Professional* > > > -- > > ___ > 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 > > ___ 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] Generator Charging Two Systems
> 3. Are there twist-lock 100A cords available off the shelf for this type of application? I don't know exactly what type of outlets or permanent wiring will be required for the generator output at this time. IEC pin and sleeve. 100A in whatever voltage. Hundreds of dollars per set. Various wall mount options. https://www.google.com/search?sca_esv=dbfe99b76a0ba531_upv=1=1C1CHBF_enUS1039US1039=iec+pin+and+sleeve+100a Or Appleton's PowerTite connectors are common on telecom and utility buildings that have needs for temporary generators: https://www.appleton.emerson.com/catalog/en-us/shop/appleton/appleton-powertite-pr But cam locks will probably be the most flexible. https://www.wireandcableyourway.com/female-cam-lok-connector-for-sizes-2-2-0 Portable commercial and rental generators are typically cam lock equipped. Then you put an inlet box on the building: https://satellitesale.net/products/intersect-icgc-1p-cam-lok-generator-connector-panel-nema-3r-120-240-200-amp best, -James Jarvis APRS World, LLC ___ 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] Magnum problem
Are you referring to the MagWeb when you speak of the "remote monitor"? If so, then no, it isn't interfering. It is a completely passive device on the Magnum network and listens only. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Tue, Oct 31, 2023 at 11:39 AM Ron Young via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hello Wrenches, > > I am completely stumped. I built a Magnum 4448 panel for a client and it > was installed by an electrician. It was thoroughly tested before going out > the door on all functions and pre-programmed for the off-grid site. > Electrician just had to hang it on the wall and make 4 connections, AC IN, > AC OUT, BATTERY, PV. Somehow the system wouldn’t go into charge mode. The > site is a 3 hour trip each way. The electrician was baffled, he had > experience installing solar but very limited so I went to the site to see > what the problem was. After spending a day checking out the inverter with > two different generators, checking all the connections, AC at the inputs at > the inverter and at the outputs on the breakers, and even removed the cover > from the inverter to make sure some connections had not shaken loose inside > the box on the long bumpy road into the property. Everything checked out. > So assuming the AC board in the inverter was faulty I ordered a new unit to > replace and that has now been done. SAME PROBLEM! I’m wondering now if it’s > possible that the Magnum remote monitor could be the problem. It functions > properly on every setting but is it possible there is an internal fault? > Could it prevent the automatic charge cycle from initiating? Seems unlikely > to me because the inverter can go into charge mode even without the > monitor. I also tried replacing the connection cable between the monitor > and inverter but no luck. > > The generators are both small, one a Honda 2kW and the other a Champion > 3.8kW. Neither is ideal but I have had no issues with these types of > generators in the past and the client has ordered a larger 10kW unit but we > don’t have it yet to test. Generators have been run with Eco Mode off. > Output to the house on bypass is consistent and without problem. > > Any suggestions - this is just confounding. > > Ron > > > earthRight Products - Solareagle.com > > ___ > 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 > > ___ 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] Well pump with Sol-Ark
On Wed, Oct 11, 2023 at 1:14 PM Dave Angelini Offgrid Solar via RE-wrenches wrote: > Even the SQ pump without the controller will soft start and should work with > any inverter built for offgrid. > > The SQ pumps work great off grid. Easily run on 24 volt Magnum inverters without even flickering the lights. Super reliable. I would avoid residential size VFD driven constant pressure pumps. I ended up with one at my current house. The VFDs go pretty regularly. My well service company can swap out a VFD in about 20 minutes and they always have a whole bunch of them on their shelves. They apparently do it quite a bit. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ > ___ 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] Module level electronics mounting
Will meet all the bologna rapid shut down unswitched conductor distances with current national electric code? I quit installing building mounted solar arrays a code cycle ago because it became impossible in my view not to have module level electronics. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 (Sent from my phone. My apologies for spelling errors and brevity.) On Thu, Sep 28, 2023, 11:52 AM Kirk Herander via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > All, > Has anyone ever mounted MLEs (optimizers, microinverters, RSDs) on the > perimeter of the array or elsewhere instead of underneath the PV module? > > I never was a fan of climbing up on a pitched roof and removing modules to > replace the electronics. And with a recent knee replacement, I won't be > providing this service again. > > In post-surgery downtime this simple idea surfaced. My next job if it's > practical is to create jumper module cables to extend down to the > electronics, mounted just outside the array on their own rail. Then create > a good-looking TBD cover to shield the MLEs from direct sunlight, snow, etc. > -- > > *Kirk Herander / **kirkh@vermont.solar * > > *Owner|Principal, VT Solar, LLC* > > *Celebrating our 32st Anniversary 1991-2023!!* > > dba Vermont Solar Engineering > > 802.863.1202 > ___ > 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 > > ___ 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] Off Grid Battery Charging
Bicycle charging her L16 battery bank would be fine waste of effort. In good shape she might be able to make 200 watts for some part of an hour before being tired. Even Lance Armstrong in his peak probably wouldn't be producing multiple kWh per day. My $0.02 worth, -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Thu, Mar 16, 2023 at 4:59 PM Larry Brown via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > > Wrenches > > I have a client that we did an off grid system for about 4 years ago > The system is performing well > The client would like to keep charged her batteries in the winter with her > stationary bicycle operating a small generator > Right now she uses a grid connection that was available and she turns on a > breaker if needed to charge the batteries in the winter through the inverter > When the batteries are fully charged she turns the breaker back off > No need for any back up other times of year > That is the only use of the grid > > Her request was to be off grid > This set up eliminated the need for her to have a generator for winter low > light conditions > So far all is working as designed > But there is talk of adding a gas generator so that if the grid is down, > there is a back up available > > The system has 16- AGM Concorde SunXtener Batteries configured in 2 > strings of 8 batteries per string > They are PVX 3050T 6 volt batteries operating at 48VDC > They are charged from the PV Array by 2- Schneider Conext MPPT 80 600 > Charge Controllers > The system has a Schneider Conext XW+ 5548 Single Inverter > > Any thoughts or ideas of what equipment can be matched with a stationary > bicycle that might give a trickle charge to the battery bank > Anyone ever played with setting this up? > She wants to try this out and see what is possible > Get some winter exercise and perhaps keep the batteries as close to full > without using the grid or a back up gas generator > > All suggestions welcome > > Thanks > Larry > > Larry Brown > Sun Mountain > > > > > > ___ > 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 > > ___ 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] DC Disconnect for first responders
Did they ever explain why they were requiring it on a nominal 48 volt system? NEC 480.7(B) (from memory, I think that is the right article) says it is for nominal voltage of 60 volts or higher. IE your 48 volt system is exempt. Jay pointed this out on February 3rd. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Mon, Feb 20, 2023 at 12:36 PM William Miller via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Friends: > > > > Here is how this resolved for my upcoming project: I submitted a request > to the building department to waive the requirement for a DC disconnect. I > based the justification on the need to keep a pressure pump for the fire > sprinklers and a fire alarm operational. I will supply an external AC > disconnect to de-energize all premise wiring except those circuits > mentioned above. The request was granted. > > > > William > > > > 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 > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > ___ 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] Remote battery disconnects
Brian and William, With all due respect, I think your geographical location of California may be limiting in your understanding of the implications of local power security. Where I am in Minnesota and where I work in Alaska, loss of power and backup power can have very expensive consequences. When it is -30F outside and howling wind, buildings only have a matter of hours before their interiors will drop below freezing. A few hours after that pipes start to freeze and break. Pressurized water then starts to spray everywhere and then things can very quickly run into six-figure dollars amounts of damage. So one way of reducing this risk is by installing an ESS. Around here, prior to the latest NEC, we didn't have exterior disconnects available for anyone to shut off power. We still don't for businesses. My point is that NEC is mandating that there be zero security of a buildings electrical systems by requiring publicly accessible disconnects on backup systems. And if NEC wasn't so prescriptive, there could be slightly more secure alternatives such as a KNOXBOX or access controlled disconnects. William: I also disagree with your premise that you'll test the battery disconnect system after dark. That's not a test; that's just cheating. You had a knowledge person tell you that the MPPT controllers can and do blow up when they lose their voltage reference (battery) under load. And removing the battery from the circuit does allow the charge controllers to island with the inverter and DC loads and do other damage. I know of a telecom customer that had hundreds of thousands of dollars of damage when their battery became disconnected. If you are unwilling to test it at full load, I'd guess you know that the whole concept is a dumb idea. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Sat, Jan 28, 2023 at 7:35 PM Brian Mehalic wrote: > Every single house I’ve looked at in my town has a breaker panel with a > main service disconnect on the outside of the house already. So in many > cases we are well beyond worrying about someone “flicking your switch!” > > In fact, in addition to the emergency disconnect requirement for > stationary standby batteries [480.7(B)] and ESS [706.15(B)] in one- and > two-family dwellings, also added in 2020 was the requirement for an > emergency disconnect for services on those same one- and two-family > dwellings [230.85]. > > Brian Mehalic > > On Jan 28, 2023, at 5:58 PM, James Jarvis via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > > It would be nice if the decision was up to the owner / occupant of the > property. I, for one, do not want any random person to be able to turn off > my house or business with the flick of a switch. I feel strongly that there > is far too much fear mongering in NEC with relation to renewable energy. > > -James Jefferson Jarvis > APRS World, LLC > +1-507-454-2727 > http://www.aprsworld.com/ > > > On Sat, Jan 28, 2023 at 6:22 PM William Miller via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Esteemed wrenches: >> >> Well if my house is on fire and the entry of fire responders is delayed >> for lack of a disconnect, I choose having the disconnect. I can worry about >> the charge controllers later. >> >> Others may prioritize their charge controller over their homes… >> >> Put a cable-tie lock in the closed position to discourage kids from >> messing with it. Test it only after dark. >> >> William >> >> On Sat, Jan 28, 2023 at 2:32 PM William Bryce < >> wlbr...@pineridgeproducts.com> wrote: >> >>> All >>> >>> One thing that no one is talking about is what happens to the MPPT >>> charge controllers when the Battery Disconnect trips when the charge >>> controllers are under full load. >>> Many will blow up. Try turning off the battery breaker on a SolaArk >>> when the charge controllers are maxed, and see if you get lucky. >>> >>> On Sat, Jan 28, 2023 at 3:27 PM William Miller via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>>> Jeremy: >>>> >>>> >>>> >>>> Thanks for posting the code references for those that had never looked >>>> them up. >>>> >>>> >>>> >>>> Chris: >>>> >>>> >>>> >>>> What do you mean by “a disconnect for AC wiring, not specific to which >>>> or both panel types”? >>>> >>>> >>>> >>>> All: >>>> >>>> >>>> >>>> Code references are handy when receiving edicts from build
Re: [RE-wrenches] Remote battery disconnects
It would be nice if the decision was up to the owner / occupant of the property. I, for one, do not want any random person to be able to turn off my house or business with the flick of a switch. I feel strongly that there is far too much fear mongering in NEC with relation to renewable energy. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Sat, Jan 28, 2023 at 6:22 PM William Miller via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Esteemed wrenches: > > Well if my house is on fire and the entry of fire responders is delayed > for lack of a disconnect, I choose having the disconnect. I can worry about > the charge controllers later. > > Others may prioritize their charge controller over their homes… > > Put a cable-tie lock in the closed position to discourage kids from > messing with it. Test it only after dark. > > William > > On Sat, Jan 28, 2023 at 2:32 PM William Bryce < > wlbr...@pineridgeproducts.com> wrote: > >> All >> >> One thing that no one is talking about is what happens to the MPPT charge >> controllers when the Battery Disconnect trips when the charge controllers >> are under full load. >> Many will blow up. Try turning off the battery breaker on a SolaArk when >> the charge controllers are maxed, and see if you get lucky. >> >> On Sat, Jan 28, 2023 at 3:27 PM William Miller via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> Jeremy: >>> >>> >>> >>> Thanks for posting the code references for those that had never looked >>> them up. >>> >>> >>> >>> Chris: >>> >>> >>> >>> What do you mean by “a disconnect for AC wiring, not specific to which >>> or both panel types”? >>> >>> >>> >>> All: >>> >>> >>> >>> Code references are handy when receiving edicts from building officials, >>> but not required, IMHO, for two reasons: The contractor should already be >>> versed in the codes and, building departments can mandate their own >>> requirements above and beyond the code. >>> >>> >>> >>> It may seem redundant to require an AC disconnect for premise wiring as >>> well as a DC battery disconnect. In most cases if you disconnect the >>> inverter from the batteries the AC power goes off. However if the >>> generator is running at the time, some battery inverters can operate when >>> disconnected from batteries. So to completely de-energize all components >>> of an off-grid home you need to disconnect the generator and the battery >>> leads. >>> >>> >>> >>> In this case the home is required to have fire sprinklers. There is >>> pressure pump to provide flow to these fire sprinklers-- said pump being >>> powered by the inverter/battery system. I am going to apply for a waiver >>> to remove the DC disconnect requirement on the grounds that the pressure >>> pump is essential fire suppression equipment. Instead I will propose to >>> supply an AC disconnect (meeting all requirements for accessibility and >>> marking) that will disconnect all premise wiring except the pressure pump. >>> >>> >>> >>> By the way, I will of course be trying to apply the logic that the >>> voltage specification is for nominal battery voltage and this project >>> having a nominal 48 volt bank does not require the battery disconnect. >>> >>> >>> >>> I will let the group know what response I receive. Regardless of how >>> this works in this jurisdiction, I think these are both valid arguments >>> worth trying in any jurisdiction requiring the battery disconnect. Some >>> officials are amenable to dialog and negotiation and some are less so. >>> >>> >>> >>> >>> >>> William Miller >>> >>> >>> >>> Miller Solar >>> >>> 17395 Oak Road, Atascadero, CA 93422 >>> >>> 805-438-5600 >>> >>> www.millersolar.com >>> >>> CA Lic. 773985 >>> >>> >>> >>> >>> >>> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On >>> Behalf Of *Jeremy Rodriguez via RE-wrenches >>> *Sent:* Saturday, January 28, 2023 10:12 AM >>> *To:* cwar...@entech-engineering.com; RE-wrenches >>> *Cc:* Jeremy Rodriguez >>> *Subject:* Re: [RE-wrenches] Remote battery disconnects >>> >>> >>> >>> >>> >>> *2020 Code Language:* >>> >>> *480.7 DC Disconnect Methods.* >>> >>> *(A) Disconnecting Means.* *A disconnecting means shall be provided for >>> all ungrounded conductors derived from a stationary battery system with a >>> voltage over 60 volts dc. A disconnecting means shall be readily accessible >>> and located within sight of the battery system.* >>> >>> *N* *(B) Emergency Disconnect.* *For one-family and two-family >>> dwellings, a disconnecting means or its remote control for a stationary >>> battery system shall be located at a readily accessible location outside >>> the building for emergency use. The disconnect shall be labeled “EMERGENCY >>> DISCONNECT”.* >>> >>> *N **(C) Disconnection of Series Battery Circuits.* *Battery circuits >>> exceeding 240 volts dc nominal between conductors or to ground and subject >>> to field servicing shall have provisions to disconnect the
Re: [RE-wrenches] AC coupled grid tie only inverter
Why was ACLD discontinued? -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 (Sent from my phone. My apologies for spelling errors and brevity.) On Sat, Oct 8, 2022, 12:35 PM Bradley Bassett via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > The ACLD was long ago discontinued. The Morningstar relay driver would > work fine. I think Magnum limited the size of the grid tie inverter to 90% > of the Magnum inverter max power. So 3960W for a MS4448PAE. > > Brad > > > > > On Sat, Oct 8, 2022 at 8:47 AM Jay via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Hi Drake >> >> I remembered that they make this product or they did. >> >> >> https://www.magnum-dimensions.com/sites/default/files/MagDocs/64-00062%20Rev%20A%20%28ACLD-40%29_web.pdf >> >> ___ >> 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 >> >> ___ > 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 > > ___ 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] Discover AES Wall Mount Considerations
Buckling of the wall studs is most likely going to be the failure mode. You can use WebStructural to look at different designs. You'll find that accurately defining the constraints on the structural members is the most troublesome. https://webstructural.com/ Personally, I don't think that supporting a couple of thousand pounds of dead load hanging off the sides of $2 studs fastened with unknown fasteners into unknown top and bottom plates is a super great idea. I would do it on a poured concrete wall, but this sounds like it is asking for trouble. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Tue, Sep 6, 2022 at 9:30 AM Jason Szumlanski via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > 2x4 studs have compressive force to hold up over 1,000 pounds each when > constructing a load bearing wall, so I don't think that is a limiting > factor. But I am not a structural engineer, so consulting one would not be > a bad idea. > > > Jason > > > On Tue, Sep 6, 2022, 10:21 AM Chris Sparadeo > wrote: > >> Thanks Jason, >> >> I’m still wondering if there is an IBC reference for weight. The Discover >> manual only states: >> >> “ For structural and seismic stability, the AES Battery must be mounted >> onto a vertical supporting surface strong enough to support a minimum of >> 227 kg (500 lbs) per battery. Failure to follow these instructions can >> result in death or serious injury.” >> >> Other than asking a structural engineer, how can I be sure that the wall >> is rated to 4,500 lbs? >> >> On Tue, Sep 6, 2022 at 9:20 AM Jason Szumlanski via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> That won't be a problem as long as they are spread across several studs. >>> Even 2x4 studs would be fine. Check the installation manual for details. >>> The shear and pull out strength of the fasteners will be the limiting >>> factor, not the wall itself unless very poorly constructed. >>> >>> >>> https://assets.discoverbattery.com/documents/03_aes/805_product_manual/gui-aes-wall-mount-bracket-installation-guide.pdf >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> >>> >>> >>> On Tue, Sep 6, 2022, 8:59 AM Chris Sparadeo via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> Hi all, I have a project where I am contemplating hanging 9 Discover AES batteries on a wall. Each battery is around 200 lbs, and although the stud wall is a bulky 2”x6” with 16” OC…I have apprehensions that hanging almost a ton of battery on the wall is a good idea. I’ve seen it done in other install photos, however I can’t seem to find and good building code that would inform my decision. Does anyone out there have a building code reference or experience that might help? Thanks! -Chris -- Chris Sparadeo C_802-369-4458 H_802-728-3059 >>> ___ 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 ___ >>> 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 >>> >>> -- >> Chris Sparadeo >> >> >> C_802-369-4458 >> H_802-728-3059 >> > ___ > 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/ >
Re: [RE-wrenches] Best peal and stick zip tie anchor
We have been using VHB zip tie bases for at least 10 years. They are marginally better than the foam zip tie bases. Some material they fall right off of and some material they do quite well on. In all cases they do better than the foam tape bases. But that may not be good enough. We consider adhesive zip tie bases a temporary fastening. -James Jefferson Jarvis APRS World, LLC +1-507-454-2727 http://www.aprsworld.com/ On Wed, Jun 8, 2022 at 4:07 PM Jay via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > I’m wondering if anyone has ever used a high quality VHB zip tie > attachment base on the center “ junction” box of a mid junction box panel. > > I’m just looking for options to anchor the wire on that perfect location, > which has no attachment. > > And if you have what are the best parts to get. > > Wiring for MLPE on Unirac RM10 > > Thx > > Jay > > > > > > > ___ > 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 > > ___ 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
