Sunforce 60113 150 Amp Battery Isolator Fully automatic dual battery controller for any vehicle with an auxiliary battery Contains a micro processor control which provides intelligent, optimal charging of both batteries Maximum alternator size: 125 amps Maximum current: 150 amps Complete unit includes: heavy duty power relays, surge protection, a micro control unit, 6mm connection studs, LED status indicators, manual override control, mounting brackets, and a dust proof enclosure.