I recently installed this IP22 30/3. But after a couple of weeks I'm getting a fault saying batteries have over voltage. I was hoping the app would give advice on how to solve problem like OP my head goes to mush with battery stuff. So I've tried changing the wiring, of note when I attached to leisure batteries the app did not show two batteries charging but I checked with voltmeter and could see them charging accordingly. I know my starter battery is sound so I connected to just that one. My isolator can be switched down to connect the starter to the leisures. So after leaving it charging for 10 minutes or so I connected them all up (could this be too much load?). After a few minutes the same fault appeared. I'm stumped, are my batteries dead, is the charger faulty? I'm using a 2kw pure sine wave generator. Could running just the charger not be enough load on the Jenny? Any help or advice would be appreciated because there is nothing on the Victron site to help and nothing in there instructions.