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<p>To add to Jeff's suggestion of targeting 95%, many Li+ batteries
have a spike in voltage as they reach 100%. We just don't have to
worry anymore about sulfate damage from under charging. <br>
</p>
<p>Ray Walters<br>
Remote Solar<br>
</p>
<div class="moz-cite-prefix">On 11/19/2022 7:14 AM, Jeff Clearwater
via RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
cite="mid:EA24583F-0DE8-474A-B9E2-1069A95A9DD0@villagepowerdesign.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
Hi Kris
<div><br>
</div>
<div>What voltage do you have your charge settings at? </div>
<div><br>
</div>
<div>I recommend that bulk or absorb voltage for lithium iron
phosphate not be set above 56 V - there is no reason for it
even though many manufactures suggest higher settings. In
cases where total storage is sized generously enough I often
use 55.6 or even 55.4 in order to target 95% as full instead of
100% in order to extend cycle life. and for float there’s no
reason to ever go over 54 V and better maybe even to be in the
mid-53s. </div>
<div><br>
</div>
<div>See if that helps assuming you had it higher. </div>
<div><br>
</div>
<div>The other thought is you have one bms that is perhaps not
protecting overcharge and allowing a temporary spike when the
others do limit. </div>
<div><br>
</div>
<div>Hope that helps! </div>
<div><br>
</div>
<div>Best Jeff C. </div>
<div>Village Power Design</div>
<div><br>
</div>
<div><br>
<br>
<div dir="ltr">Sent from my iPhone</div>
<div dir="ltr"><br>
<blockquote type="cite">On Nov 19, 2022, at 6:32 AM,
Kristopher Schmid via RE-wrenches
<a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a> wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<div dir="auto">Greetings all,
<div dir="auto"><br>
</div>
<div dir="auto">I have seen an issue on two different
systems that I am hoping someone can shed some light on
for me. One was a 48 volt pack of 12 volt Battle Bornes
and the other was a 24 volt pack of SOKs. What happens
is when reaching the end of the bulk charging stage, the
battery voltage spikes and sends the inverter into an
overvoltage error. Can anyone explain what is happening
and a solution?</div>
<div dir="auto"><br>
</div>
<div dir="auto">Thanks,</div>
<div dir="auto">Kris<br>
<br>
<div data-smartmail="gmail_signature" dir="auto">Shine
On!<br>
<br>
Kris Schmid<br>
Legacy Solar, LLC<br>
137 West 1st Avenue<br>
Luck, WI 54853<br>
<a href="http://www.legacysolar.com"
moz-do-not-send="true">www.legacysolar.com</a><br>
715-653-4295<br>
NABCEP Certified PV Installation Professional<br>
Licensed Wisconsin Master Electrician<br>
BSEE</div>
</div>
</div>
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