Battery Isolators

Battery Isolators are solid state devices which allow electrical current to flow in one direction only, thus permitting the alternator to be connected directly to two batteries without fear of one high charged battery discharging into the lower charged battery. Both batteries are always being charged, automatically, in proportion to their needs, whenever the engine is running. When battery isolators are used in conjunction with selector switches, it is not necessary to change
the switch position to provide charge of both batteries. Isolators provide proportioning of the output or charging current on the alternator to the batteries required, regardless of switch position. Rated for use with 10 to 350 amp alternators on
12, 24, or 32 volt negative ground systems.


Battery Isolators cannot be used on 12 volt charging systems with 24 volt trolling motors.

See Pages 60 thru 62 for a complete selection and a valuable TechTip.