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jkb asked

resting voltage LFP

I charged my drop-in Lifepo4 battery 100A 24V (25.6V) with built-in BMS without bluetooth with 28.4 V to 100% full. After the charger is switched off, the Victron smart-shunt app gives a resting voltage of 26.6 volts. Is that normal?

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snoobler answered ·

LFP is similar to lead-acid in that it needs to be charged to a higher voltage than operating.

Lithium ion like those used in EVs have a very strong voltage to SoC relationship and charge to a target voltage with very little fall-off.

LFP is not like that. It's very common for them to come to rest around 3.3-3.35V/cell and their are 8 cells in your 24V battery, so 26.4-26.8V is typical.

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jkb answered ·

Thank you. I'm reassured!

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