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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