Originally Posted by Milspec33
dual batteries with a selonoid to isolate one from the other
You would be better served installing twin true deep cycle 6v batteries. Like Trojan T-105's. Together the twin 6v have more juice than 2 gr24's.
I have 2, T105's and I can go 3 days before charging the batts. Thats with a few LED nightlights on.