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<pre><span style="font-size: 12pt;">My comment would be in a closed loop battery power system the BMS is in charge and feeds back into faults and warnings about the battery, <br />Inverter/charger, and other devices. Open loop does not integrate all of the devices. Closed loop is all we should be using these days, in my opinion!<br /><br />Closed loop will also will do a sanity check and adjust charge/discharge settings based on Soc. Open loop systems can lose a setting from generator/grid <br />surges. This could be the case here. It could also just be a Radian that has died. <br /><br />I would look in the Radian for history clues of what happened.<br /><br /></span></pre>
<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
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text 209 813 0060</span></strong></pre>
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<p id="reply-intro">On 2022-12-27 3:34 pm, Peter Giroux via RE-wrenches wrote:</p>
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<p class="v1MsoNormal">Nick</p>
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<p class="v1MsoNormal"> Thank you for doing this. I have been able to learn more. I did the original install 5 + years ago. Ac coupled system, has run great since installed. Replaced customers wet cells 1.5 years ago with a fortress evault and had Outback help with all of the programing while on site. System has been flawless until two days ago when the customer smelled smoke at 2 am in the morning.</p>
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<p class="v1MsoNormal"> We thought the battery got hot and melted the container on top of the battery which in turn melted the conduit ( only one section, the other was fine ) running into the Radian. Pulled the lid off the battery and the insides were fine, including the BMS board I replaced last summer. No damage to the underside of the lid Re heat or ?? so I had the customer pull off the cover to the radian and the wires were intact and undamaged. Turns out one of the transformers/ power stages was burnt with lots of black soot all over it. So as of today it looks like the culprit is the radian. Headed up there next week to go over the whole system</p>
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<p class="v1MsoNormal"> Any thoughts or ideas are welcome, please and thank you.</p>
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<p class="v1MsoNormal">Peter</p>
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<p class="v1MsoNormal"><strong>From:</strong> Nick A Lucchese <lucchesesolar@me.com> <br /><strong>Sent:</strong> Tuesday, December 27, 2022 3:47 PM<br /><strong>To:</strong> RE-wrenches <re-wrenches@lists.re-wrenches.org><br /><strong>Cc:</strong> pgiroux@mindspring.com<br /><strong>Subject:</strong> Radian and Fortress incident</p>
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<p class="v1MsoNormal">Greetings Peter,</p>
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<p class="v1MsoNormal">I created a new subject line out William's previous "utility transformer" thread for your incident. Any more details surface about this installation? Eflex or Evault? Were all the settings programmed by yourself or someone else you trust? Installed to specifications provided by each manufacturer? Do you know if it was charging by PV controllers or the Radian at time of fire? One battery of an entire bank that failed? Physical connections appear to all be of full integrity? I've had a control board on a Radian completely melt and appear to have been on fire for a brief moment due to extended operation pushing current limits on the AC side but my experience with the Eflex has been great so far other than a minor firmware snag initially. Only reason I used it instead of Blue Ion was due to their lack of an exterior cabinet compared to the Eflex's IP65 rating. Hope you can provide more details once you have time to fully investigate. Highly likely I will be responsible for both of these products on future projects.</p>
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<p class="v1MsoNormal">Nick</p>
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<p class="v1MsoNormal">On Dec 26, 2022, at 6:40 AM, Peter Giroux via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer">re-wrenches@lists.re-wrenches.org</a>> wrote:</p>
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<p class="v1MsoNormal">Morning all. Just got a call from a customer with a radian and fortress battery that caught fire. Has anyone had any issues with either unit?? We have numerous systems with combos of both and no issues. System has been in place for well over a year, climate controlled garage and system has worked well. Did a BMS board replacement earlier this year.</p>
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<p class="v1MsoNormal"> Any and all help appreciated.</p>
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<p class="v1MsoNormal">Thank you</p>
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<p class="v1MsoNormal">Peter Giroux</p>
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