<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 <jeffc@villagepowerdesign.com> 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>