<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Ray<div><br></div><div>I think you are on to something. </div><div><br></div><div>I have multiple eVault MAX batteries on a Radian and I have had mysterious random shutdowns with high SOC before. </div><div><br></div><div>Could be they were off grid at the time or had a big load shut off causing a voltage bounce. </div><div><br></div><div>The batteries are comm\u2019d together but not to the Radian, of course. </div><div><br></div><div>If that is the case, I wonder if there is a newer battery firmware that can over come this or in fact why a LiFePO4 can\u2019t go over 55.2 when most have a 58.4V limit. </div><div><br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Thank you,<div><br></div><div>Maverick</div><div><div id="AppleMailSignature" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;"><div class="ApplePlainTextBody"><br></div><div class="ApplePlainTextBody">Maverick Brown<br>Off-Grid Solar Commander since 2006<br>Maverick Solar Enterprises, Inc.<br> \u2022 Solar Commander Remote Power<br> \u2022 SunFlow Systems Cathodic Protection <br>maverick@mavericksolar.com<br>512-460-9825</div><div><br></div></div></div><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On Aug 27, 2024, at 5:24\u202fPM, Ray Walters via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>Is it possible that a load shut off, and then the controllers
over shot the voltage long enough to shut the BMS off? If so,
what's the solution? Lower absorb voltages? I checked voltage
calibration between the various pieces of equipment.<br>
</p>
<p>Ray<br>
</p>
<div class="moz-cite-prefix">On 8/27/2024 4:14 PM, Jerry Shafer via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAMUFgmXha4VU_f979kKMk+Tf32DCB-5R+Q1k4UW1com5cWmJBg@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">
<p dir="ltr">High voltage disconnect would do this, is the site
monitored</p>
<p dir="ltr">Fun times</p>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Tue, Aug 27, 2024, 2:47\u202fPM
jay via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" rel="noreferrer" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word;line-break:after-white-space">I
have a buddy in tech support at Fortress.
<div><br>
</div>
<div>I asked him and he said that elevated absorb volts
above 55.2 could cause this situation. </div>
<div>And then the power cycle would reboot the BMS.</div>
<div><br>
</div>
<div>I am presuming its open loop, and the fact you
mentioned that there was more PV and then the shut down
sure might be connected. </div>
<div>You might check the charge voltages/time to make sure
they are correct and I can\u2019t remember if the classic has
battery sense wire connections. </div>
<div><br>
</div>
<div>jay</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
<div><br>
<blockquote type="cite">
<div>On Aug 27, 2024, at 2:51 PM, Ray Walters via
RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" rel="noreferrer noreferrer" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:</div>
<br>
<div>
<div>
<p>The SPD was on one of the PV inputs before it
came into the house. There were two Classics,
each fed with its own PV input and SPD. It
actually caused an underground splice to fail
(high resistance) which I replaced the splice
and restored full voltage, and both Classics
were working fine. Just seems unlikely ( but
not impossible) that the surge would make it
past the Classic without damage, but then damage
the Fortress BMS in an otherwise imperceptible
manner. That is our current best theory at the
moment though. I added an SPD on the 48 v
buss, before this latest total shutdown. <br>
</p>
<p>Ray Walters<br>
</p>
<div>On 8/27/2024 2:35 PM, Dave Angelini Offgrid
Solar via RE-wrenches wrote:<br>
</div>
<blockquote type="cite">
<div id="m_5761316424256984060m_289539169493499258signature">When I have had
someone lose an SPD (I assume it was on DC
buss) there is often latent damage (shows up
later) to many of the devices. In a Hi Rel
mode, it is recommended to replace it all.
Most offgrid is not that critical but try
telling that to someone with rotten food.</div>
<div> </div>
<div>The freezers and reefers are often full of
spoils that smells never go away. YUK !<br>
<pre> </pre>
<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noopener noreferrer noreferrer" target="_blank" moz-do-not-send="true"> </a><a style="color:blue;font-size:11px;font-family:'Lucida Grande',Verdana,Arial,Helvetica,sans-serif;font-weight:400;background-color:#ffffff" href="https://offgridsolar1.com/" rel="noopener noreferrer noreferrer noreferrer" target="_blank" moz-do-not-send="true"><span style="font-size:12pt">https://offgridsolar1.com/</span></a><a href="http://members.sti.net/offgridsolar/" rel="noopener noreferrer noreferrer" target="_blank" moz-do-not-send="true"> </a>
e-mail <a href="mailto:offgridsolar@sti.net" rel="noreferrer noreferrer" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<p><br>
</p>
<p id="m_5761316424256984060m_289539169493499258reply-intro">On 2024-08-27
1:02 pm, Ray Walters via RE-wrenches wrote:</p>
<blockquote type="cite" style="padding:0 0.4em;border-left:#1010ff 2px solid;margin:0">
<div style="margin:0;padding:0;font-family:monospace">Greetings All;<br>
<br>
I have Fortress Battery installation with a
pair of E Vault batteries set up in a
Master/ Slave arrangement. Its been working
fine for over a year, but the customer just
had a complete shutdown of the batteries
which left multiple freezers, and
refrigerator with rotting food. When he
rebooted the batteries by turning on/off the
main breaker on each, they both come up and
showed 100% SOC on the Master, and 98% on
the other. There were no fault codes. I
just recently installed a larger PV array,
and so the system has been reaching full
charge every morning.<br>
<br>
I have multiple calls in to Fortress, but
not hearing anything back from them at all.
We did have a lightning surge event a few
months ago, that damaged a Midnite SPD
(first ever for me), and took out the
control board on the generator. One VFX
inverter has an LED out, but we only use two
inverters of the Quad stack, so I just
switched to another inverter. All other
equipment appeared fine: Midnite
controllers, rest of the Outback VFX quad
stack, and never any issues seen with the
Fortress batteries.<br>
<br>
The other odd thing, is since he rebooted
the batteries, the system is working fine,
and recharging to 100% by 9:30 am as
before. Is it possible the Fortress BMS
were damaged and are now having an
intermittent shutdown issue? I did ask him
to temporarily disconnect the comms between
batteries, in case it is a bad BMS on one,
it will isolate it from the other.<br>
<br>
This is a tough one to figure out, since it
hasn't happened again, and there are no
fault codes. The Mate 3 shows a low
frequency AC code, but that's usually just
from the generator shutting down. Any
help, ideas, experiences, would be greatly
appreciated.<br>
<br>
Thanks,<br>
<br>
Ray Walters<br>
Remote Solar<br>
<br>
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