Doug. it is the fuse on the unit. the 25 amp. Im as sure as I can be that the batteries are connected correctly. Like I said, we did them one at a time and it was done by an interstate employee. I disconnected the chassis batteries because one was dead/had a dead cell or short and I thought that might be tripping the fuse on the inverter.
I replaced the chassis batteries and reconnected them and everything seemed to work fine for a spell but is now doing the same thing.
When I push the charge button to charge the batteries ( and I just did) there was a hum that got louder (seems to be the same sound I get from my gfci outlets when inverting) then the fuse blows on the inverter. sometimes when i turn the charger on the fan comes on right away and sometimes not but the fan sounds fine (no rattling). Also, the cables get warm pretty quick. not hot and no burning smells but warm.
Walmart sells a battery maintainer for 58 bucks. Can I hook them up to my batteries to maintain them without disconnecting them? Also, can i hook it up to all 4 of my house batteries at once?