Heavy Duty 70 Amp Battery Power Selector

This battery power selector provides a simple, solid-state solution to the need for routing redundant DC power sources for vital electronic equipment while maintaining isolation of the DC power sources. Two independent batteries are wired to separated terminals on the selector and internal diodes maintain total isolation between the batteries. A single output is wired to the critical load, which is then powered by the higher voltage source.

Isolation prevents the higher charged battery from 'dumping' into the lower charged or failed battery. Current is drawn automatically and continuously from the battery with the higher charge, so that there is no interruption of power if one of the batteries fails or becomes totally discharged.