Rotary switch for boat electric circuit
Mastervolt

Mastervolt supplies high current battery switches that can be used for switching off the battery negative pole or to distribute the charge current over several batteries manually. In this way the batteries are charged one by one under your guidance.

This maintenance-free manual switch, made of polycarbonate material with heavy duty metal contacts, has on/off positions to be chosen with a key. Designed for built-in or surfaced mounting, the switch is spark proof according to SAE guidelines. Therefore it can safely be used in vessels with petrol engines.

But simply using a battery switch does not guarantee batteries cannot become discharged at the same time. Much better results can be achieved by placing a battery isolator between the source and batteries. The three or more diodes mounted inside isolate the charge current and prevent it from re-circulating.