SOC drops from 93% to 0% with 150 amp draw


  • Yesterday I moved my motorhome into storage for the winter. 280AH battery was at 93%, temp at 38ºF; turned on inverter & convection oven to 350ºF to reduce SOC down for storage. SOC went to 0% on BMS through app, oven continued working fine on inverter pulling 150 amps, battery voltage dropped down to 12.0 volts, then came back up to 12.3 > 12.5 while oven running.  Ran oven for 30-40 minutes, SOC remained at 0%, after turning oven off volts came up to:  13.09 with individual cells at 3.27 each.  I figured that should have brought my SOC down to close to 60%. No alarms from battery app.  Turned off battery switch after parking in storage.

    Any idea why SOC went to 0% even though voltage didn't drop that much?  It will be in storage for a couple more months before I can check on it.



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