VEHICLE WAS PARKED AND SLIDES EXTENDED RUNNING ON GENERATOR. LIGHTING SEEMED TO DIM AND WOULD FLICKER. HAVE NEW HOUSE BATTERIES, INVERTER WAS REBUILT. WE WERE IN THE FRONT OF COACH OUR DOG INDICATED SOMETHING WAS WRONG AND WAS BARKING IN THE BEDROOM AREA. UPON INSPECTION FOUND SMOKE COMING FROM THE 12V FUSE CENTER. OPENED DOOR AND CENTER BOLT WAS GLOWING AND FUSES WERE TOO HOT TO TOUCH. SHUT DOWN 12V AND THE FUSES COOLED DOWN. TURNING POWER BACK ON DID NOT DUPLICATE ISSUE UNTIL THE 12V ACCESSORIES WERE TURNED ON (LIGHTING, FANS ETC.). SWITCHED COACH TO SHORE POWER (SHUT DOWN GENERATOR) AND FUSES DID NOT GET AS HOT. DEALER REPLACED THE FUSE CENTER AND PROBLEM WAS RESOLVED. HAD WE BEEN AWAY FROM THE COACH OR THE DOG DID NOT ALERT US, THIS MAY HAVE NOT ENDED WELL. THE DEALER SAYS HE HAS SEEN THIS BEFORE CLAIMS IT IS THE WAY THE POWER WIRE FEEDS THE FUSE BUS CAUSING THE WIRE TO LOOSEN. SUGGEST THAT ALL OWNERS HAVE THIS CHECKED. *TR