Cole Hersee Company, manufacturer of electrical and electronic products for the vehicle industry, offers its high-amp Double Pole Master disconnect switch engineered for use in trucking applications.

At the track, the tech guy said we couldn't run next time if we didn't hook up a battery cut off switch ... basic Battery Disconnect sold almost everywhere is only rated to 20 amps continuous.

It features a three-position toggle that switches from “PWR” (house power), “OFF” (disconnect mode), and “GEN” (generator ... It’s available in three voltage/amperages: DSS15–15 amp/120V; DSS25–25 amp ...