Battery Bank - wire for 12v, 24v, or 48v?
I have four 12v 100Ah Battle Born lithium drop-ins. I'm looking towards the future using Victron components: - 3,000W inverter w/ hybrid load-support - solar charging Currently I have a built-in ...
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phemens wrote:
I just did a battery revamp and added 4 lithium batteries, stayed with 12v setup due to pre-existing 12v inverter charger. Very happy with it, They don’t sweat high draw loads, but i’m finding that my Victron 702 is not an accurate indicator of charge. I think it calculates it based on amps out but doesn’t seem to jive with the readings I see on each of the batteries via their BMS panel. Some tweaking to do there. Agree that amps in and out will be the main indicator, but not sure yet how to accurately show that via the 702.
I would trust the Victron, which uses a precision shunt versus the on-board BMS, which *maybe* is using a hall effect sensor but more likely is guesstimating based on cell voltage.
I can't find anyone on youtube that cut one of these batteries open yet to take apart the BMS. All the recommended videos seem like commercials to me.
