I have 2 batteries. I want to use 1 for my trolling motor, the other stays in the camper to run things. After use I want to charge it with solar during the day. How to wire this? They say if you put another drawn down battery in parallel it could hurt your fully charged battery. Should I get another solar modulator box and charge it away from the first one? Or does it matter?
Also does it matter that both batteries are different manufactures. Like putting duracell and energizer batteries in same flashlight?