Install stand-alone charge controllers. That is the only way to get redundancy.
Eric Smiley (he/him) - Design Manager 250.703.6004 e...@vecoop.ca 888.386.0116 3-4997 Polkey Rd, Duncan BC, V9L 6W3 viridiansolar.ca <https://www.google.com/url?q=https://viridiansolar.ca&source=gmail-html&ust=1702155901939000&usg=AOvVaw3SHpXB-WRSlzWmjpz4htqG> Viridian Solar honours the ancestral grounds on which we live and provide services, recognising that these lands are unceded Indigenous territory. We are steadfast in our commitment to reconciliation and acknowledge the rich history and traditions that characterise this land that we all consider home. On Thu, 10 Oct 2024 at 14:59, Lou Russo via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Aloha All, > > Thank you Jason. This is a huge and surprising issue. So much so that I > dropped what I was doing and called Sol-Ark to confirm. Mind you this was > level 1 support, but I was told this is what the Sol-Arks are supposed to > do and it is a feature not a bug. Their take is if there is any fault on > any one string, the Sol-Ark assumes the worst and shuts everything down. > > I wonder what solutions could be implemented on future installs to prevent > this from happening? > > Aloha, > > Lou Russo > Owner > l...@spreesolarsystems.com > Office - 808 345 6762 > Spree Solar Systems LLC > CT-34322 > > > > On Thu, Oct 10, 2024 at 11:45 AM Jason Szumlanski via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> I think it's more likely water in a J-box or possibly physical damage, >> but someone passed by the property and did not observe any physical damage >> to the array. >> >> Jason Szumlanski >> Principal Solar Designer | Florida Solar Design Group >> NABCEP Certified Solar Professional (PVIP) >> Florida State Certified Solar Contractor CVC56956 >> Florida Certified Electrical Contractor EC13013208 >> >> >> On Thu, Oct 10, 2024 at 5:41 PM Jay <jay.pe...@gmail.com> wrote: >> >>> Jason >>> What’s the possibllity it was a lighting strike? >>> >>> Jay >>> >>> On Oct 10, 2024, at 2:57 PM, Jason Szumlanski via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>> >>> We have been talking a lot recently about all-in-ones. I just had a >>> massive fail during Hurricane Milton with a quad Sol-Ark 15K off-grid >>> system that deserves some discussion about whether AIO is a good idea if it >>> can't build in some resilience to errors. I'm not sure if the new Midnite >>> unit is better in this respect, but this is what happened to the Sol-Ark >>> system... >>> >>> Four inverters, each with 4 strings of PV paralleled to 2 MPPT per >>> inverter. One of the slave units developed some sort of PV DC fault during >>> the storm. This caused the slave inverter to shut down and throw an error, >>> which in turn caused a parallel fault across all four inverters. Power >>> output ceases at that point. Apparently the system keeps resetting because >>> I have a cell modem that uploads data to Sol-Ark, but that cell modem is >>> powered by the inverter outputs, so it must be getting power at least >>> intermittently. The rest of the loads are basically flatlined according to >>> the Sol-Ark data. It's mostly air conditioners, so they probably can't turn >>> on fast enough before the PV fault causes another shutdown. >>> >>> So, in essence, one of 16 strings of PV develops a fault, and that >>> causes all four inverters to malfunction? What is the point of redundancy >>> if a fault of one results in a fault of all?! If there is a true PV input >>> fault, shouldn't that just shut down that MPPT, or perhaps all of the PV DC >>> input to that inverter? And why can't this inverter continue to invert >>> power from the batteries and charge from a generator when there is a DC >>> input fault that could be programmatically isolated and ignored? >>> >>> This is a bad design in my opinion, and something I hadn't considered. >>> If the faulted inverter can't function with a DC input fault, it should >>> just take itself out of the game. (This is 120/240 split phase, BTW). Is >>> this how all AIO inverters work? One inverter fault on the DC side kills >>> all paralleled units' AC output? Not good. >>> >>> This is a completely off-grid system on a remote island with no vehicle >>> access, so it's not exactly easy to do a "truck roll" on this one, >>> especially post-hurricane. To make matters worse, the generator was running >>> at the time of the fault, as it was being signaled to run because the >>> battery had reached the assigned charge voltage. The fault also killed the >>> 2-wire start signal from the master, so the system also stopped passing >>> through generator power to the loads. The house is dark. >>> >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> >>> _______________________________________________ >>> 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 > >
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