<p>The BMS in each system will balance under charge and protect hi discharge currents in multiple battery systems. This is typical in multiple Li batteries. I would expect them to do this BP. I have seen this with 20 of the AES Li batts. No problems with circulating currents. I would expect you to have had this with the AGM banks. Ouch too many strings.</p>
<p>The cost is missing some data for me at a glance. LFP has always been a minimum of 2 times more when I look. The costing also depends on them lasting the full warranty and someone with deep pockets to back it up. Hope this helps.</p>
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<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p>On Mon, 10 Aug 2020 22:09:00 -0700, William Miller <william@millersolar.com> wrote:</p>
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<p class="MsoNormal"><span>Friends:</span></p>
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<p class="MsoNormal"><span>I am hoping y'all can tell me I am doing something wrong with my arithmetic. I have registered to purchase Blue Planet batteries and priced the product. I come up with math that indicates that comparing usable amp/hours to usable amp/hours, that the Blue Planet is 5 times the cost of a flooded L-16 battery array on a cost per kilowatt/hour. Can this be true?</span></p>
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<p class="MsoNormal"><span>I am using these parameters:</span></p>
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<p class="MsoListParagraph" style="margin-left: .75in;"><span><span style="mso-list: Ignore;">1.<span style="font: 7.0pt;"> </span></span></span><span>DOD for flooded L16s: 50%</span></p>
<p class="MsoListParagraph" style="margin-left: .75in;"><span><span style="mso-list: Ignore;">2.<span style="font: 7.0pt;"> </span></span></span><span>DOD for Blue Planet: 100%</span></p>
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<p class="MsoNormal"><span>I hope I am wrong.</span></p>
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<p class="MsoNormal"><span>Also, we often install battery arrays that are upwards of 4,000 AH. For example, we installed 5,668 of East Penn flooded batteries on a couple of projects. To acquire the same capacity in Blue Planet would require 9 cabinets (again 50% DOD versus 100% DOD). Is this correct design? Is it practical to install 9 cabinets? Does the system detect and compensate for circulating currents in this many parallel strings?</span></p>
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<p class="MsoNormal"><span>Thanks in advance.</span></p>
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<p class="MsoNormal"><span>William Miller</span></p>
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<p class="MsoNormal"><strong><span style="font-size: 10.0pt;">From:</span></strong><span style="font-size: 10.0pt;"> RE-wrenches [mailto:<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>] <strong>On Behalf Of </strong>Jerry Shafer<br /><strong>Sent:</strong> Sunday, August 9, 2020 12:02 PM<br /><strong>To:</strong> RE-wrenches<br /><strong>Subject:</strong> Re: [RE-wrenches] Best Battery</span></p>
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<p class="MsoNormal">Wrenchel have been very happy with all my Blue Planet battery systems, best battery you will install.</p>
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<p class="MsoNormal">Jerry</p>
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<p class="MsoNormal">On Sun, Aug 9, 2020, 11:19 AM <<a href="mailto:drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.org</a>> wrote:</p>
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<p class="MsoNormal" style="margin-bottom: 12.0pt;">Hello Wrenches,<br /><br />What is the best Li-Ion battery to use with an off grid system?<br /><br />Thanks,<br /><br />Drake<br />Athens Electric<br /><br />-- <br />_______________________________________________<br />List sponsored by Redwood Alliance<br /><br />List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br /><br />Change listserver email address & settings:<br /><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br /><br />List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br /><br />List rules & etiquette:<br /><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br /><br />Check out or update participant bios:<br /><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a></p>
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