I've added another battery to my two existing batteries and followed the instructions, all the lights are blinking as expected. I force charged it overnight and HA shows 98% SoC and 4.8kwh. I'd expect closer to 7.1kwh since I have three total.
I've read in this forum you need to do a force charge from full -> empty -> full again. I did the full charge last night. Do I just need to run the batteries down to the minimum SoC (currently 10%), or do I need to set it to zero for the purpose of commissioning the new battery?
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