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siletzspey avatar image
siletzspey asked

BMV Temp Coefficient and MPPT Temp Compensation

Does the BMV-7xx's "Temperature Coefficient" setting just improve SOC readings, or in a networked configuration does it also have some influence on a Solar MPPT and it's "Temperature Compensation" setting?

For Lithium batteries, the recommendation seems to be BMV Temperature Coefficient = 0.9% cap/F and MPPT Temperature Compensation = Disabled. I was just wanting to make sure a BMV Coefficient setting will not override a MPPT Compensation setting.

Thanks,

--tg

temperature
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1 Answer
Stefanie (Victron Energy Staff) avatar image
Stefanie (Victron Energy Staff) answered ·

Hi @siletzspey,

the BMV temperature coefficient setting affects only battery capacity in relation to temperature below 20°C and does not influence compensation on a MPPT. The higher the temperature, the more battery capacity.
Below 20°C battery capacity starts to decrease.

MPPT temperature coefficient directly affects voltage compensation during charging. For LiFePO4 this should be set to zero. No compensation.

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