question

dancing-skeptic avatar image
dancing-skeptic asked

Battery erroneously discharging

I'm hoping someone here might be able to shed some light on this issue. I have 2x 48v batteries that both have overkill solar BMSes installed. I'm currently pulling in 4.3kw of solar and using 1.2kw of ac load. The inverter is the only draw on the system. One of the batteries is charging at about 1.4kw, but the other one is showing a discharge of about 400w.

Do any of you have any idea why this would be?

Thanks.

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MultiPlus Quattro Inverter ChargerLithium BatteryVenus OS
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1 Answer
Alexandra avatar image
Alexandra answered ·

@dancing_skeptic

Current sharing due to the wiring set up is most likely the issue.

Alternatively one is discharging to draw down high cells in the pack sort of balancing related? Still if it is charged up before the other it is current sharing related.

Did you charge them up both fully before connecting them together in the system?

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