This model only works with the 12 volt SA series of inverters. Samlex also makes a 24 volt version. The S-R6-12 is the most advanced remote control available for the SA series inverters rated for 1,000 watts and higher. It has an on/off button and LED light indicators for over voltage protection, under voltage protection, over temperature protection, over load protection and power save mode. Its two bar meters allow you to monitor battery voltage and output power. It also has a built in reverse override function for RV’s and campers. Comes with a 10 foot cable but can be expanded up to 50 feet. This switch is useful when you need to control your inverter from the cabin of an RV, boat or an a adjoining room.