Ok my goal is to have my camper battery charge off the vehicle alternator, and not have it kill my starter batteries when camping.
I picked up a ford starter solenoid for 13 bucks; I priced an isolator for about $140 bucks.
The idea is to connect grounds to camper battery and starter battery together, solenoid will connect positive lead of camper battery to starter battery only when ignition is on.
If this sounds like it'll work for what I'm looking to do as much as I think it does, what more does a battery isolator really do for the huge price difference?
I picked up a ford starter solenoid for 13 bucks; I priced an isolator for about $140 bucks.
The idea is to connect grounds to camper battery and starter battery together, solenoid will connect positive lead of camper battery to starter battery only when ignition is on.
If this sounds like it'll work for what I'm looking to do as much as I think it does, what more does a battery isolator really do for the huge price difference?