For pickups, vans, SUVs, RVs, campers, trailers and boats
Prevents stronger auto battery from being discharged into weakened auxiliary battery
High-output 90-amp isolator with 50-amp circuit breaker for complete safety
Everything you need to install auxiliary battery except the battery box. Automatic isolator allows alternator to charge both batteries while the engine is running. When at camp and engine is not running, isolator ensures that current is drawn from auxiliary battery only. Solid state. Isolator, terminals, circuit breaker, 8-ft. of 8-gauge wire, 16-ft. of 10-gauge wire, connectors, tie straps, hardware and instructions included. For 1986-2007 Chevy, GMC and Toyota vehicles: Connector kit required (sold separately, ZX129422 for 1986-1995; ZX077612 for 1996-2007).