Hi, I did not phrase my previous entry very well. What I meant was if you accidently hooked up your batteries (both terminals) in reverse polarity, in effect you also connect the Inverter (and other house battery loads) in reverse (this “might” cause damage depending on what was “turned on” at that specific time). Typically there is just a breaker or a slow blow inverter fuse between coach (house) batteries and the Inverter unit. With any luck, it is just some poor connection or open fuse somewhere you have not found as yet. Most stand-alone converters have fuses to protect against accidental reverse battery connections…….but I don’t think inverters do. Attaching a “generic” DC battery diagram to help visualize.
__________________
|