question

groanman avatar image
groanman asked

SOC shows much higher than actual state

BMV-700 with 2 12v batteries and a 100w solar charger.

After a very sunny day of sailing, my SOC says I'm at 97.8%. However, battery voltage is at 12.45V which indicates its rather around 80% charge.


Previously, I had the batteries falling below 12V with the SOC still registering in the 90's.


I have made sure the correct battery capacity was set in the settings and I'm confident I have no other battery draining that wouldn't be registered by the shunt.


Any idea what could be the issue?

SOC
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3 Answers
groningen avatar image
groningen answered ·

@GroanMan


Do you have a Shunt installed in your system?

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groanman avatar image
groanman answered ·

You mean the one that came with the BMV that measures current draw? Yes I do

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kevgermany avatar image
kevgermany answered ·

Usual cause is incorrect settings in the BMV. Are you charging from solar? Are your batteries AGM or lithium ?

Please post a screen shot of the BMV battery settings

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