<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Seems like this is a firmware setting and should be adjustable. If lo<div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Oct 10, 2024, at 3:59 PM, Lou Russo via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Aloha All,<div class=""><br class=""></div><div class="">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. </div><div class=""><br class=""></div><div class="">I wonder what solutions could be implemented on future installs to prevent this from happening? </div><div class=""><br clear="all" class=""><div class=""><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr" class=""><div dir="ltr" class="">Aloha,<div class=""><br class=""></div><div class="">Lou Russo </div><div class="">Owner</div><div class=""><a href="mailto:lou@spreesolarsystems.com" target="_blank" class="">lou@spreesolarsystems.com</a></div><div class="">Office - 808 345 6762</div><div class="">Spree Solar Systems LLC </div><div class="">CT-34322</div><div class=""><br class=""></div></div></div></div></div><br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Oct 10, 2024 at 11:45 AM Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">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.</div><div class=""><div dir="ltr" class="gmail_signature"><div dir="ltr" class=""><br class="">Jason Szumlanski<div class=""><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px" class="">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px" class=""><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px" class="">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px" class=""><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px" class="">Florida State Certified Solar Contractor CVC56956</span></div><div class=""><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif" class="">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br class=""></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Oct 10, 2024 at 5:41 PM Jay <<a href="mailto:jay.peltz@gmail.com" target="_blank" class="">jay.peltz@gmail.com</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto" class=""><div dir="ltr" class=""></div><div dir="ltr" class="">Jason </div><div dir="ltr" class="">What’s the possibllity it was a lighting strike?</div><div dir="ltr" class=""><br class=""></div><div dir="ltr" class="">Jay</div><div dir="ltr" class=""><br class=""><blockquote type="cite" class="">On Oct 10, 2024, at 2:57 PM, Jason Szumlanski via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" class="">re-wrenches@lists.re-wrenches.org</a>> wrote:<br class=""><br class=""></blockquote></div><blockquote type="cite" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div style="font-family:arial,helvetica,sans-serif" class="">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...</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class="">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.</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class="">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?</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class="">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.</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class="">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.</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div style="font-family:arial,helvetica,sans-serif" class="">Jason Szumlanski</div><div style="font-family:arial,helvetica,sans-serif" class="">Florida Solar Design Group</div><div style="font-family:arial,helvetica,sans-serif" class=""><br class=""></div><div class=""><div dir="ltr" class="gmail_signature"><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><b class=""></b></div></div></div></div></div></div></div></div></div>
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