And it works as Howie described with Fortress inverters, at least in my only grid-tie Fortress. Only all pv inputs shut down, not the inverter.
On Thu, Oct 10, 2024 at 7:48 PM Howie Michaelson via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Hi all, > The response from Midnite: > * On a PV insulation fault, only the pv shuts down. On other pv faults > (I'm not sure what they would be) they say that it is required to shut off > the AC. > * In stacked systems, if one inverter errors off that does not bring down > the other AIOs. > > Howie > > > On Thu, Oct 10, 2024, 7:19 PM jay via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > >> Seems like this is a firmware setting and should be adjustable. If lo >> >> On Oct 10, 2024, at 3:59 PM, 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. 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