Hi all.
I have a bank of Victron Superpack batteries that are connected to a BMV 712 smart monitor. The batteries are charged by solar and a mains charger. All equipment (including pv panels) are Victron.
My question is this. When I set my monitor to 100% charge state of batteries (as I know they are at 100%), over time the percent charge reading starts to drop. It's generally about 3% per week. When I reset to 100% it starts again. I am happy that the batteries are actually at 100% and thats what the charger and the mppts for the pv are telling me. Also, it doesn't drop slightly and stop, it keeps dropping at a linear rate. So far, its dropped as low as 83% before I reset.
Any ideas please?