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<p>I've gotten word back from Fortress on this issue. Here's what
they said:</p>
<p><i>The problems you were describing align with an issue in the
earlier eVault Max batteries that we call "ghosting." Batteries
with this issue would turn off like you described when being
idle or taking very little current, for an extended amount of
time. A firmware update should resolve this issue.</i></p>
<p>Thought you all should know. I'll keep you updated on how the
firmware update goes.</p>
<p>Thanks,</p>
<p>Ray Walters<br>
Remote Solar<br>
</p>
<div class="moz-cite-prefix">On 8/27/2024 4:20 PM, Ray Walters via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:424fd157-7f1b-4b9f-b166-bee47e929980@solarray.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p>I have both controllers set to the Fortress recommended absorb
settings of 54.4 vdc for 2 hrs. Its always possible that there
was voltage over swing or something. I did check that the
voltage on the controllers was within a0.1 vdc of the battery
voltage at the Fortresses. I'm now using a pair of Midnite
Hampton Bay Controllers. They're rated to 90 amps, but I set
them down to 85 A output, just to provide some head room. I
don't mind the very occasional clipping. The array is two
strings of Jinko 425s, 10 per series string, so 4250 w per
controller. <br>
</p>
<p>I wonder if the voltage that causes trouble for Fortress might
have changed due to the possible lightning surge?<br>
</p>
<p>Ray<br>
</p>
<div class="moz-cite-prefix">On 8/27/2024 3:46 PM, jay wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8874459D-456F-4B57-AD14-281425B0530E@gmail.com">
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8">
I have a buddy in tech support at Fortress.
<div class=""><br class="">
</div>
<div class="">I asked him and he said that elevated absorb volts
above 55.2 could cause this situation. </div>
<div class="">And then the power cycle would reboot the BMS.</div>
<div class=""><br class="">
</div>
<div class="">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 class="">You might check the charge voltages/time to make
sure they are correct and I can’t remember if the classic has
battery sense wire connections. </div>
<div class=""><br class="">
</div>
<div class="">jay</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
</div>
<div class=""><br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Aug 27, 2024, at 2:51 PM, Ray Walters via
RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
class="moz-txt-link-freetext" moz-do-not-send="true">re-wrenches@lists.re-wrenches.org</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<div class="">
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" class="">
<div class="">
<p class="">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
class="">
</p>
<p class="">Ray Walters<br class="">
</p>
<div class="moz-cite-prefix">On 8/27/2024 2:35 PM,
Dave Angelini Offgrid Solar via RE-wrenches wrote:<br
class="">
</div>
<blockquote type="cite"
cite="mid:73b67fe1b3d521cc295be424ab132127@sti.net"
class="">
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" class="">
<div id="signature" class="">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 class=""> </div>
<div class="">The freezers and reefers are often
full of spoils that smells never go away. YUK !<br
class="">
<pre class=""> </pre>
<pre class=""><strong class=""><span
style="font-size: small;" class="">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" rel="noopener"
moz-do-not-send="true" class=""> </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" moz-do-not-send="true"
class=""><span style="font-size: 12pt;" class="">https://offgridsolar1.com/</span></a><a
href="http://members.sti.net/offgridsolar/"
rel="noopener" moz-do-not-send="true" class=""> </a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true"
class="moz-txt-link-freetext">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<p class=""><br class="">
</p>
<p id="reply-intro" class="">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"
class="">
<div class="pre"
style="margin: 0; padding: 0; font-family: monospace">Greetings All;<br
class="">
<br class="">
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 class="">
<br class="">
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
class="">
<br class="">
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
class="">
<br class="">
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 class="">
<br class="">
Thanks,<br class="">
<br class="">
Ray Walters<br class="">
Remote Solar<br class="">
<br class="">
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