<div dir="ltr">I once had a Fortress eVault misbehaving. I found that one of the little tiny crimps in the Molex-like connectors was not made correctly. When I would tug at certain angles it would trip the relay. I was able to do a field repair.<br><br><div>Another thing that maybe the manufacturer can help with is downloading history from the BMS. Given the history of the installation, the BMS may be doing its job. If there is no indication that it sent the signal to trip out (maybe you have certain dates that you can zoom in on), then I'd look for component/control wiring failures.</div><div><br></div><div>Good luck and let us know!</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Apr 8, 2025 at 7:30 AM Jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></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"><div dir="ltr"></div><div dir="ltr">If I understand it correctly, the K3 relay is being powered into the off mode indicating it’s a BMS issue as it’s getting power to do that. </div><div dir="ltr">And since it appears to happen either while charging or under load, which should eliminate high volt issues, again it seems like a BMS problem. </div><div dir="ltr">How to deal with it if the company is telling you to pound sand? </div><div dir="ltr">The options are to modify it, or replace it with another brand Bms or replace the whole battery. </div><div dir="ltr"><br></div><div dir="ltr">When you factor in your time/money and need for reliability vs how inexpensive these batteries, I think it’ll point to the solution. </div><div dir="ltr"><br></div><div dir="ltr">Jay </div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Apr 8, 2025, at 6:49 AM, Dana Orzel via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
I once was at an installation by others doing a T/S with a single OB Radian & 2 - FM 100s that worked & then did not work. In removing the front door the FM 100 s Woke up briefly & then off as I was tracing wires it happened again. I tapped/ knocked on the
GS box & the FMs briefly woke up agin & turned off. At the same time I heard a slight “dizzith” crackle or a short arc sound. The sound was so quiet if anything had been running ie: fans etc I wouldn’t have heard it.
<div>Started to do a wire tug test carefully & discovered that both of the negative wire terminals had not been tightened down for the battery negative conductors at the shunt terminals. Good case for having taped the shaft on your long screw driver to get
to the back of the GS box with the AC - DC breaker bar held to the left while Working hot.</div>
<div><br id="m_8083565625069176260lineBreakAtBeginningOfSignature">
<div dir="ltr">Dana Orzel - <a href="mailto:dana@solarwork.com" target="_blank">dana@solarwork.com</a> - 208.721.7003</div>
<div dir="ltr"><br>
<blockquote type="cite">On Apr 7, 2025, at 9:27 PM, Mac Lewis via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
<br>
</blockquote>
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<blockquote type="cite">
<div dir="ltr">
<div dir="auto">
<div>I'd look for weak/loose internal control circuitry, especially connected to the K3 contractor or it's drive coil. Grab, pull, twist all connectors and see if the relay responds. </div>
<div dir="auto"><br>
</div>
<div dir="auto">Good luck 🤞 <br>
<br>
<div class="gmail_quote" dir="auto">
<div dir="ltr" class="gmail_attr">On Mon, Apr 7, 2025, 4:54 PM Maverick Brown via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
</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"><span style="color:rgb(0,0,0)">What voltages are you using with it for ABS? Are you running open loop? Does the battery pretend to be Pylontech or some other protocol? </span>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">Maybe the BMS is tripping from high volts, even for a brief period. </div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">The spec does say maximum of 56V. </div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">Most all other 16S LiFePO4 can go much higher, in theory to:</div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">3.65 max cell voltage = 58.4</div>
<div style="color:rgb(0,0,0)">3.5 vpc is 56V</div>
<div style="color:rgb(0,0,0)">3.45 vpc = 55.2V, my favorite sweet spot</div>
<div style="color:rgb(0,0,0)">3.4 vpc = 54.4 is preferred by a few vendors.</div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">Is the Sol-Ark on the internet so you can look at voltage charts? If so, I can look at it if you want/can share it. </div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)">Absorb time is another story. </div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div style="color:rgb(0,0,0)"><br>
</div>
<div dir="ltr">Thank you,
<div><br>
</div>
<div>Maverick</div>
<div>
<div id="m_8083565625069176260m_-7221261733018929735m_-306683983880994278AppleMailSignature" style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px">
<div><br>
</div>
<div>Maverick Brown<br>
Off-Grid Solar Commander since 2006<br>
Maverick Solar Enterprises, Inc.<br>
• Solar Commander Remote Power<br>
• SunFlow Systems Cathodic Protection <br>
<a href="mailto:maverick@mavericksolar.com" rel="noreferrer noreferrer" target="_blank">maverick@mavericksolar.com</a><br>
512-460-9825</div>
<div><br>
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<div><br>
</div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Apr 7, 2025, at 5:00 PM, Kevin Pegg via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">Hello Wrenches, <u>
</u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">Has anyone seen this before? I’m dealing with a battery bank that keeps tripping out, opening the K3 contactor, randomly. I can’t find any pattern nor cause. Voltage is ok, load ok, temperature
ok. It could be during the day under PV charge, or in the evening. The battery bank is paired with a SolArk 15k. Same behavior if it’s closed loop or open loop voltage-based control. SolArk tech support said it was not supported in closed loop. GSL tech support
has not been useful and refuses to address the issue at hand. <u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">This is close but not exact model.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><a href="https://www.gslenergybattery.com/20kwh-wheel-design-solar-energy-storage-battery--2048kwh-lifepo4--modular--scalable--10-year-warranty--ul-certified" rel="noreferrer noreferrer" target="_blank">https://www.gslenergybattery.com/20kwh-wheel-design-solar-energy-storage-battery--2048kwh-lifepo4--modular--scalable--10-year-warranty--ul-certified</a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">I wrote about this same project Dec 2024 was able to recover a frozen and 18 months abandoned deeply discharged battery bank. Capacity wise, they are fine. This site is not continually occupied;
I just don’t know how to get it to the point where the system is reliable. Tempting to bypass the K3 contactor, as it still would have a secondary one for safety.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">Kevin Pegg<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">EA Energy Alternatives Ltd.
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt"><a href="https://www.google.com/maps/search/37471+Hwy+16?entry=gmail&source=g" rel="noreferrer" target="_blank">37471 Hwy 16</a> E
<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11pt">Telkwa, BC V0J 2X2<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:"Times New Roman";font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>