I am having the same problem. I have 2 115 amp 12v batteries and a sure power 1314a battery isolator. I think it’s 6 gauge wire I ran from my battery. I am finding that when I disconnect 1 battery in my camper, the isolator works as it’s supposed to and stays connected, but when I reconnect my second battery it starts disconnecting. Anyone else have an idea?
What Patrick said. To test, hook up JUST the second battery and see how it does, or have them tested separately.
