We bought a used catamaran with 4x 220 AH victron 12V batteries (see attached) in parallel. I’m trying to find the data sheet for charge state vs resting voltage. I also done quite understand why the voltage takes such a big dip and then rebounds (no load) after I disable my multiplus inverter/charger. I stop the charger and the batteries drop from float voltage (13.1V) down to 12.45V and then slowly begin rising again. I haven’t let them sit unloaded for 6 hours but will do that next to see where they settle.
