question

leavenotrace avatar image
leavenotrace asked

New Batteries: Low voltage despite low usage

I just installed 2 new Duracell AGMs (100ah) in my camper. I reset the history on my BMV700. Watched a few hours of TV last night, ran the water pump a few times. Wake up in the morning to my batteries at 12.24V.

BMV shows SOC at 94% and only used 19AH. Why is my voltage so low? Did I get bad batteries?

BMV Battery MonitorSOCbattery system voltage
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Alexandra avatar image Alexandra ♦ commented ·

Normally batteries do not come with a full charge.

You may need to make sure they are charged up fully then recalibrating your bmv to the full charge.

Is the bmv programmed otherwise for your specific batteries?

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schlanbusch avatar image
schlanbusch answered ·

I think Alexandra is right.
At 12,25V your batteries are close to 50% SOC
So a good charging, and then reset the history should do it

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