Sure Power 12023A 120 Amp Battery Isolator

120 amp, 2 battery isolator for Delcotron CS Series 130 (100-105 amps) and 144 (120 amps) alternators. For GM light trucks (1986 and up) and "P" Series RV chassis (1987 and up). Use with 80A circuit breaker (not included). 1 per pack.