Dual sensing - Charge from the start and auxiliary allows access. The VSR detects the voltage of both the start & auxiliary allowing it to engage or isolate depending on the battery's voltage level.
“What an absolute awesome product. I don’t have dual battery in the tow car so I mounted it in the caravan. Car battery with fuse to this unit. Second battery (caravan battery) to this unit. While driving the car charges both. While sitting the solar charges both. I’m able to leave the fridge on while shopping or having lunch knowing both batteries are suppling power and solar is kicking in. If it goes below voltage then this unit cuts the start battery. Works excellently.”
