this is the opposite of the problem I am encountering. the SOC meter may show 50% and the owner thinks this is true, but it actually only contains 40ah, or 28%, when the meter says 50%. In one example he shows, a 200 ah bank has degraded, and only holds 140. almost everything he talks about is really about what causes ah counters to display a higher SOC than the battery actually is.
it's excellent, though I was already familiar with most of that, he goes into good and clear detail.Īll that still just makes me more confusted, though. as far as I know the meter was accurate on the old bank, and nothing changed in the way the system is set up (except the addition of a BMS inline on the bank) telling me that more ah have been removed from the bank than it can hold, by multiples.
#TRIMETRIC MONITOR FULL#
it seems to not be counting the ah coming in (or is overcounting the loads, I guess) so that after a just a few days it will think the bank is at ~30% when it's actually at ~70%, and if I don't get a full charge for a few weeks, it can get way out of line. I have turned it up to 100% efficiency, but every day that the system cycles but doesn't reach totally 'full' (to reset the meter in the trimetric) the ah count gets further off of reality. the trimetric meter has trouble keeping track of the ah in/out. nearly the same total capacity (~28kwh 24v) but of course the LFP allows much greater discharge. Last fall I upgraded an aging AGM bank on my off grid property with a bank of LFP prismatic cells. I'm not sure if this is the best forum for this question, but here it is.
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