ACFT EQUIP PROB COMPLETE ELECTRICAL FAILURE.

Narrative

AT CRUISE ALT OF 8000 FT APPROX 10 MINS AFTER DEP FROM A PRIVATE FIELD AT DEERFIELD RESORT; A GENERATOR OUTPUT CIRCUIT BREAKER POPPED. THIS HAD NEVER HAPPENED BEFORE IN THIS ACFT. I RESET THE CIRCUIT AND THEN BEGAN TURNING OFF NON-ESSENTIAL ELECTRICAL EQUIP. I NOTICED THE ALTERNATOR INDICATED A LOW CONDITION AND I IMMEDIATELY ADVISED ZID OF MY SIT AND INDICATED WE WOULD ATTEMPT TO MAKE LONDON; KY; IF MY NAV SYS REMAINED INTACT. I ALSO DECLARED AN EMER AND WAS GIVEN DIRECT CLRNC TO LOZ. WITHIN APPROX 1-2 MINS; I EXPERIENCED A TOTAL LOSS OF ELECTRICAL PWR TO MY PANEL. JUDGING THAT ANY ATTEMPT TO MAKE AN APCH UNDER THESE CONDITIONS WOULD BE UNWISE; I TOOK THE FIRST OPPORTUNITY TO DSND THROUGH A BREAK IN THE CLOUDS TO OBTAIN VMC. THIS ACCOMPLISHED; I USED MY HANDHELD BATTERY OPERATED GPS TO NAV TO THE NEAREST ARPT WHICH WAS WILLIAMSBURG; KY; 4I1. KNOWING I WAS BELOW RADAR COVERAGE; AND NOT KNOWING IF WE WOULD EXPERIENCE FURTHER RELATED ELECTRICAL PROBS (IE; FIRE OR ENG FAILURE); I TEMPORARILY ACTIVATED MY ELT TO HELP PINPOINT MY LOCATION FOR CTR. UPON SUCCESSFULLY LNDG AT 4I1; I IMMEDIATELY CALLED AUTHORITIES BY TELEPHONE; REACHING NASHVILLE FLT SVC WHO RELAYED OUR STATUS TO ZID. THE CAUSE OF THE ORIGINAL ELECTRICAL FAILURE IS BEING INVESTIGATED.