Originally Posted by NoTLaDStyle
Isolators are made up of several high current diodes which restrict each battery from charging the other and eventually draining both batteries. The diode voltage drop is between .4 and .6 volts - not 2 volts! The isolators on my solar power system run at 13.7v between 4 optima marine batteries.
If the relay is opened and the alternator is not operational then both batteries will drain each others voltage as where an isolator can operate whether or not the alternator is running..
Hmm, interesting... my research sux then... lol, as for extra wiring, I was thinking of the wiring needed to hook up an isolator or relay under the hood.
I was considering doing incoporating a solor trickle charger / relay so when I'm not using my car, my battery is always topped off
Good info.