<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">That\u2019s the way it\u2019s always been if you\u2019re off grid with Solar it\u2019s hard to convince people to buy enough solar to actually charge the batteries correctly between the loads that are running most of the time and the often on nature of sun</div><div dir="ltr"><br></div><div dir="ltr">It\u2019s easier now, it was even more difficult when Solar was $10 or watt</div><div dir="ltr"><br></div><div dir="ltr">Bob</div><div dir="ltr"><br>On Jul 14, 2021, at 1:32 PM, Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><p>I can ask my battery guy! He is the best with AGM and a dealer for full river and concord. He does this alot! Saves a bunch. He always says that most of the warranty is just a full/corrective charge and 80% are good. Undercharging is the problem. Very very few are overcharged. His words! I just replace the bank, no time to play with this stuff.</p>
<p>However, I just do the same thing I do with any bank of individual batteries. I put a large load on the bank with the inverter and look at each cells voltage. You may have done this... </p>
<p>The hard part is, depending on the make, is pulling the cell and doing a full charge and EQ if it is the make that allows it.</p>
<p>The other hard part is just getting batteries these days. I just heard Trojan is 8+ months out. You know what Steve from RollsSurrette has said. 8 weeks I think.</p>
<p>The easy part, what make is your cell? </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 Wed, 14 Jul 2021 10:16:31 -0700, Jeff Clearwater <<a href="mailto:jeffc@villagepowerdesign.com">jeffc@villagepowerdesign.com</a>> wrote:</p>
<blockquote type="cite" style="padding-left:5px; border-left:#1010ff 2px solid; margin-left:5px; width:100%"><!-- html ignored --><!-- head ignored --> <!-- meta ignored -->Hey Good Folks,<br> <br> I've got a 2300 AH AGM pack of 2 Volt cells that is showing signs of premature aging (only 600 cycles) and I need to test the AH capacity of each cell to help the customer make decisions going forward of whether to replace individual lagging cells or the whole pack.<br> <br> What equipment have folks used to do AHour tests on 2 Volt 2300 AH cells? I've done plenty of load testing on 6, 12, 24 and 48 volt packs as a whole but am not sure what's my best approach is for 2 volt individual tests.<br> <br> I know I could put a resistance load and then use an AHour integrator unit - but does anyone know of what unit and what resistive load I'd use at 2 volts? That would be a large device at that voltage to get any appreciative wattage! - I'd like to do a 10 hour test at most.<br> <br> I see 2 V test units on the web but they only appear to be hooked up for a small amount of time - so they can't be testing full to empty discharge AHours. <br> <br> Thanks!<br> <br> Jeff Clearwater<br> Village Power Design<br> <a href="http://www.villagepowerdesign.com">www.villagepowerdesign.co<span style="color: #000000;">m</span></a></blockquote></div></blockquote><blockquote type="cite"><div dir="ltr"><span>_______________________________________________</span><br><span>List sponsored by Redwood Alliance</span><br><span></span><br><span>Pay optional member dues here: <a href="http://re-wrenches.org">http://re-wrenches.org</a></span><br><span></span><br><span>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a></span><br><span></span><br><span>Change listserver email address & settings:</span><br><span><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></span><br><span></span><br><span>There are two list archives for searching. When one doesn't work, try the other:</span><br><span><a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a></span><br><span><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></span><br><span></span><br><span>List rules & etiquette:</span><br><span><a href="http://www.re-wrenches.org/etiquette.htm">http://www.re-wrenches.org/etiquette.htm</a></span><br><span></span><br><span>Check out or update participant bios:</span><br><span><a href="http://www.members.re-wrenches.org">http://www.members.re-wrenches.org</a></span><br><span></span><br></div></blockquote></body></html>