I have 2 206 Ah SOK batteries that I installed (wired in parallel) in my campervan last week. At first the electrical system was working flawlessly - I hooked up a victron inverter, a sterling b2b charger, and numerous outlets. All working. I changed a few things and at some point everything went belly side up. Now one battery reads 2.4V and the other reads 9V.
Does anyone have any idea how I could diagnose or fix the problem?
In case it makes a difference, here are the things that changed since I last confirmed everything was working:
1. Added a temperature sensor to one of the negative battery terminals (connected to the inverter)
2. Built wooden frames around the batteries, added furniture pads to the outside battery case, and installed them in the frames. With the furniture pads, there is a fair amount of pressure on the battery case.
3. It has gotten colder outside (down to high 20s at night).
Does anyone have any idea how I could diagnose or fix the problem?
In case it makes a difference, here are the things that changed since I last confirmed everything was working:
1. Added a temperature sensor to one of the negative battery terminals (connected to the inverter)
2. Built wooden frames around the batteries, added furniture pads to the outside battery case, and installed them in the frames. With the furniture pads, there is a fair amount of pressure on the battery case.
3. It has gotten colder outside (down to high 20s at night).