Removed from a Van's RV-8 in working condition during a panel upgrade.  14VDC operation, and it makes for a very clean installation in the side switch panel of the RV-8.  The indicator installs in the instrument panel and provides real-time fault monitoring/indications for each switched circuit, high and low voltage monitors, and a bar graph for current draw/charge for system health. 

From the literature:    https://www.aircraftspruce.com/catalog/pdf/11-00431instruct.pdf

"The Exp-BUS DC Load Center replaces the master solenoid, all but one circuitbreaker, the master switch function, and the avionics master switch function. The avionics output bus provides six overload protected, power output circuits. Switched outputs include the alternator field output, Beacon/Strobe output, nav light output, aux fuel pump output, and two LDG light outputs. All outputs are overload protected,eliminating the need for fuses or circuit breakers, and saving the labor of installing and wiring them up."