Compatible: Our battery cut off switch is easy to install and use, For DC 12 - 48V system isolation and fixed electrical systems, can be used alone or with other switches. Universal Used - The 3 speed battery switch is widely used in cars, ships, boats, RVs, campers, trucks, ATVs, UTVs, battery banks Durable and Corrosion Resistant - High quality ABS plastic is highly corrosion resistant, can withstand extreme marine conditions and extend its service life Three removable side plates provide access to cables up to 1/0. The rear cover insulates the rear terminals from shorting to meet ABYC requirements. Note - The engine must be stopped before selecting OFF. This is to protect the alternator.eliminating any power draw from the battery when not in use.