Not just a booster but a reducer as well giving full charge control regardless of alternator voltage

Specially designed for Rule pumps

Remember the whole regen energy recovery idea only works if the batteries are not full

crescent‐shaped ice

One power meter showing % of charger capacity being used as well as power capacity remaining

Rule - 2- and 3-Way Panel Bilge Pump Switches, Part No. 41 - Volt 12 - Amps 20 Forespar Not just a booster but41 & 42 Deluxe Switches control any pump equipped with automatic switch. Three positions: AUTOMATIC, OFF or MANUAL. Has spring return "Off" from manual position you can't leave it on by mistake. Attractive stainless steel panel with red indicator light and pre wired fuse. 43 & 44 are the same as 41 & 42 but have a black plastic panel and an internally lighted rocker switch. 45 Standard Switch is similar to the Deluxe Panel Switch, but without