<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="">Kienan,<div class=""><br class=""></div><div class="">Sounds like your diagnosis of a blown capacitor is definite proof of a serious repair. However, in my years of playing with the Islands I have fairly recently observed similar behavior with the screens not powering up while there is sufficient DC voltage at it\u2019s terminals. Four times now one of the DC Power trailer systems I am responsible for did the same thing but after a full 45 minutes with the DC breakers completely powered down it then came back on once the breakers were closed again. After the first incident I came back with a Radian to loan them because I thought it was either a complete failure or due to a closed loop communications glitch between the SI\u2019s and the Blue Ion\u2019s Namaka however this still happened even if I tried to fool it by just programming the SI\u2019s with a VRLA charging profile. After some behind the scenes tweaking by Blue Planet\u2019s supportive techs (Jody is the best) the site experienced trouble free closed loop operations for about 8 months until a few weeks ago when we started getting similar shutdowns. I say similar because I was only able to support the customer remotely without being on site but he was describing the same exact thing with the screens being blank while the Classic controllers were indicating above 51 vdc. I was able to verify through the Stellar interface that upon each incident site conditions appeared to be normal with very small load and no less than 31% SOC at the least. This happened three days in a row at about the same time of day and once again after letting Blue Planet know they were able to update some firmware on their end which so far has rewarded the site with trouble-free power once again though we\u2019re only about 12 days beyond the incidents at this point.</div><div class=""><br class=""></div><div class="">The other time I observed this was twice on a Multicluster job I installed about 16 months ago. Same thing, no lights on the inverters while the batteries still had reasonable capacity left to give. I don\u2019t recall if it was just the one master cluster or all of them but it appeared to be really bad at first thinking I needed to come up with some extra Islands in a hurry but then after an extended period with the Island's DC breakers open they eventually powered up as if nothing ever happened.</div><div class=""><br class=""></div><div class="">The point is there are definitely some deep settings in those inverters not mentioned in the manual where the screens go blank for undetermined reasons. See if an extended off duration works to your advantage before resorting to more burdensome efforts. Then as Chris said call Solar Cowboyz and see if you can speak with Louis.</div><div class=""><br class=""></div><div class="">Dang ole Islands man. Good luck, Nick</div><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 5, 2022, at 3:11 PM, Kienan Maxfield <<a href="mailto:maxfieldsolar@hotmail.com" class="">maxfieldsolar@hotmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Hello all,</div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">I'm troubleshooting an interesting case. It's a DC coupled SMA Sunni Island system with two of the 6048 SI's. I think that the both of the SI's are fried, and I think I know why, but there's a strange twist so I thought I'd ask if anyone here has any insight...</div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">So this is a DC Power system, and whoever was building these at DC power made a mistake on the Main wire that connects to the battery, so the connection came loose. When I looked at it for my client, I saw that there is an internal capacitor in one of the SI's that is blown. I assumed that the loose connection cause voltage spikes from the charge controller to damage the inverter. But then I repaired the wiring, and everything powered up fine, and the SI system was putting out perfect power. Then, two days later, I looked at it again because the customer was going to come pick it up, and the inverters were apparently dead. I tried resetting them, but it seems like there's just nothing. The screen won't come on, it won't make any noise, etc. There is good voltage on the DC in terminals. So my question is why they both came on, and why they both fried after the problem was fixed. I mean, it makes sense that they were damaged from the voltage spikes from loose wiring, but I don't understand why they would come on and then finish frying with no load...</div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Other question, I know that with outback inverters, you can normally repair the inverter by replacing a board that is a fraction of the cost of the inverter. Is this so with SMA SI's? And does anyone have a recommendation on how to troubleshoot at a board level, or where to source the boards? I did already tell the customer that I think his inverters will need to be replaced, but just hoping to make sure I don't overlook something first...</div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Thanks,</div><div style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class="">Kienan</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div style="font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;" class=""><br class=""></div><div id="Signature" class=""><div class=""><div id="divtagdefaultwrapper" style="font-size: 12pt; font-family: Calibri, Arial, Helvetica, sans-serif;" class=""><br class=""><div class=""><strong style="font-family: "Comic Sans MS";" class=""><font face="Calibri" size="4" class="">Maxfield Solar</font></strong><div class=""><font face="Comic Sans MS" size="4" class=""><a href="mailto:maxfieldsolar@hotmail.com" class=""><strong class=""><font face="Calibri" class="">maxfieldsolar@hotmail.com</font></strong></a></font></div><div class=""><font face="Comic Sans MS" size="4" class=""><strong class=""><font face="Calibri" class=""><div style="font-family: Calibri, Arial, Helvetica, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", NotoColorEmoji, "Segoe UI Symbol", "Android Emoji", EmojiSymbols; 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