Quote Originally Posted by RUGER761 View Post
Ah good deal the relays make it easy. Sounds like just a dead batt then.
Hi, I was able to do load tests on both batteries this past weekend. Battery #1 was reading 12.5 volts and the load test read the battery was super dead. The needle zipped over and bottomed out. Battery # read 11.9Volts and "weak" on the load test. Both batteries are starting batteries. Should the boat have a deep cycle as the house battery?

I'm thinking of replacing the dead battery with a deep cycle marine battery and move the good starting battery to the number 1 position.