<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>A follow up question to all of this:</div><div><br></div><div>Does anyone know what parameters a BMS is using to determine SOC for lithium?</div><div><br></div><div>A project I installed uses the Orion BMS jr for lithium batteries. It uses a normal shunt, voltage and also measures internal cell resistance to determine SOC. </div><div><br></div><div>Jay</div><div>Peltz Power</div><div><br></div><div><br></div><div><br></div><div><br></div><div><br>On Aug 21, 2018, at 10:29 AM, Howie Michaelson <<a href="mailto:Howie.Michaelson@gmail.com">Howie.Michaelson@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>Allan, have you talked directly with Bogart?</div><div>Howie<br></div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Aug 21, 2018 at 12:56 PM Sindelar Solar <<a href="mailto:Allan@sindelarsolar.com" target="_blank">Allan@sindelarsolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Wrenches,<br>
I would like to broaden this topic a bit, please: we're currently
installing our first Blue Ion LFP set (48kWh). I work almost
exclusively with existing off grid systems, often older systems most
of which have TriMetric monitors, either the TM2020 or newer TM2030.
Has anyone successfully reprogrammed a TriMet to accurately register
SOC and other data with LFP batteries? If so can you provide some
guidance as to program settings?<br>
Thank you, <br>
Allan<br>
<br>
<div class="m_-8515681449123654391m_1525077187236035643moz-cite-prefix">On 8/20/2018 6:15 PM, Lou Russo wrote:<br>
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<div dir="ltr">Jay,
<div>The batteries are Blue Ion 2.0 from Blue Planet Energy, the
8kWh cabinet. The listed Maximum Continuous Charge and
Maximum Discharge Rate is 1C.</div>
<br>
<div>
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<div dir="ltr" class="m_-8515681449123654391m_1525077187236035643gmail_signature" data-smartmail="gmail_signature">
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<div>Aloha,
<div>Lou Russo</div>
<br>
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<div class="gmail_quote">
<div dir="ltr">On Sat, Aug 18, 2018 at 6:27 AM Jay <<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>>
wrote:<br>
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<div>Hi Lou,</div>
<div>Can you tell us which LFP batteries? </div>
<div>And what rates of discharge/charge?</div>
<div>Jay</div>
<div>Peltz power. </div>
<div><br>
On Aug 17, 2018, at 12:09 PM, Lou Russo <<a href="mailto:lou@spreesolarsystems.com" target="_blank">lou@spreesolarsystems.com</a>>
wrote:<br>
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<div dir="ltr"><span id="m_-8515681449123654391m_1525077187236035643m_700485566270581614gmail-docs-internal-guid-6934b5d4-7fff-c4d2-710d-73d94bc9268d">
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Hello All,</span></p>
<br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Does anybody have any insight in getting the SOC to report accurately on the Outback FNDC when using batteries that have a minimal voltage curve? I have several systems with LFP batteries that have both a eGauge (communicating directly with the battery BMU) and a FNDC and I get wildly different SOCs. In a typical 24 hour period (12am-12am) I get SOCs on the FNDC that vary 2% to 34% of what the battery BMUs are reporting. I am assuming that the BMUs are reporting accurately. I would think a 1%-5% difference would be acceptable.</span></p>
<br>
<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial;color:rgb(0,0,0);background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;vertical-align:baseline;white-space:pre-wrap">Any help or thoughts on this subject would be greatly appreciated.</span></p>
</span><br class="m_-8515681449123654391m_1525077187236035643m_700485566270581614gmail-Apple-interchange-newline">
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<div>Aloha,
<div>Lou Russo</div>
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<div class="m_-8515681449123654391m_1525077187236035643moz-signature">-- <br>
<div class="m_-8515681449123654391m_1525077187236035643WordSection1">
<p class="MsoNormal" style="line-height:normal"><b><span>Allan
Sindelar</span></b><span><br>
</span><a href="mailto:allan@sindelarsolar.com" target="_blank"><span>allan@sindelarsolar.com</span></a><span><br>
</span><span>NABCEP
Certified PV Installation
Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive
Energy, Inc<span class="m_-8515681449123654391m_1525077187236035643GramE">.</span></span><br>
<b>505 780-2738 cell</b></span><span><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
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