In response to all your comments:
I did check all of the circuit breakers first thing Air conditioner worked after I started on -board generator.
The batteries did show full charge after I started the unit engine and drove home. They have remained charged as we speak.
The reversal of cable seems remote since I was connected to shore power and never removed or changed the connection.
Will Check fuse near battery, but if batteries show full charge after starting is this a possibility?
Have yet to do voltage checks but will do later today.
One additional question: Is converter out of charging circuit when engine or the generator is running??? If so, are bad fuses still a possibility?