@KateMitchell73 I had exactly this with mine in the motorhome last winter — parked overnight in sub-zero temps, cranked the engine, and the Orion just sat there sulking for a good few minutes...
@CoastalCamper that'll be a painful discovery after a winter layup.
Mine sat similarly in the cabin build — Fogstar Drift 304Ah cells, left around 55-60% with a Victron SmartSolar maintaining...
Seen this exact thing with my motorhome pack over last winter. Had a Daly on a 4-cell 280Ah setup and one cell crept down to 3.1V while the others stayed around 3.3V — nothing dramatic but enough...
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