Derek is great and entertaining and has been on the UL3741 mission for a while now. Mayfield Renewables has a great video (1 hour long), though not as entertaining, that really digs into UL3741
https://youtu.be/FIPZibVbrus?si=LyI6TpLEMiV_8-GO On a side note, Mayfield Renewable is a great outfit to work with for your larger (greater the 100kW) installs. Aloha, Lou Russo Owner l...@spreesolarsystems.com Office - 808 345 6762 Spree Solar Systems LLC CT-34322 On Tue, Oct 8, 2024 at 5:55 PM david quattro <da...@quattrosolar.com> wrote: > This is an excellent explanation of many aspects of 3741. > https://youtu.be/mgD0O9WfKVU?si=-SRdLuTd4XGDToKp > At the NABCEP conference in Raleigh earlier this year, there were > popular presentations about 3741. > I think it can be a great solution for some small commercial, but not > for residential. > > > > On Tue, Oct 8, 2024 at 12:41 PM Dave Tedeyan via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Hi Lou, >> >> It looks like Ironridge with the Midnite's MNSSR-600S-SS and some Solis >> Inverters (or Tesla) are compatible. But that is all I know of off the top >> of my head. >> >> https://www.ironridge.com/2024/02/27/flush-mount-systems-listed-to-ul-3741/ >> >> I have not actually pursued this yet, but would be curious to hear if >> others have and whether they like it. >> >> Cheers, >> Dave >> >> On Tue, Oct 8, 2024 at 3:01 PM Lou Russo via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> Hello Wrenches, >>> >>> We are researching UL3741 and NEC2020s Photovoltaic Hazard Control >>> System. Whether it is safe or not is a discussion for another time. >>> >>> After digging around a bunch it does not seem to be really geared toward >>> us residential (grid-tied and off-grid) and small commercial installers. >>> But I wanted to connect with folks who know the landscape better than us >>> before we disregard it for the foreseeable future. >>> >>> UL3741 listed racking systems and solar panels are not the limiting >>> factor, as there are enough manufacturers listed that we use regularly and >>> can get easily. It appears that Midnite's MNSSR-600S-SS may be a good path >>> for us as it has been tested with the Sol-Ark15k but from what I can tell >>> not to UL3741 standards. >>> >>> It seems the short list of compliant inverters with a compliant racking >>> system using Midnite's MNSSR-600S-SS is what would hold us back. As we >>> don't actively use any of the listed inverters. >>> >>> Has anyone heard from inverter manufacturers that are actively working >>> with a racking company on getting UL3741 or if they EVEN want to pursue it >>> (besides Tesla, Solis, SMA, GrowWatt)?Specifically battery based hybrid >>> inverters or charge controllers. I can't seem to find any. >>> >>> Thank you for your input. >>> >>> Aloha, >>> >>> Lou Russo >>> Owner >>> l...@spreesolarsystems.com >>> Office - 808 345 6762 >>> Spree Solar Systems LLC >>> CT-34322 >>> >>> _______________________________________________ >>> 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 >> >>
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