Dual Battery Isolator,12V 140 Amp Voltage Sensitive Relay VSR Automatic Charge Relay,Universal Car RV LED Smart Charging for ATV, UTV, Boats, RV's,Marine Vehicle,Truck,Caravan

【High QualIty & Durable】Dual battery smart isolator has a rugged housing for extreme envirONments, waterproof, shockproof，dustproof and moisture resistant, and has surge protected, keeping your vehicle and battery safe from unexpected surges. 【LED Light Design】 Built-in LED indication light (ON when VSR starts). It also has a remote LED port that indicates the status of the VSR. 【 Voltage Sensitive Relay】The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.3 volts, the VSR engages, allowing two battery banks (start and house) to be charged simultaneously. 【Zero Voltage Drop】Dual battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance. When the voltage drops below 12.8 volts (eg the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the house battery from harmful engine start up spikes. 【Widely Use】This battery isolators are small and suitable for almost anywhere, for ATV, UTV, Boats, RV's，marine vehicle, truck, caravan