The Magnum Energy ME-BMK Battery Monitor is a “fuel gauge” type of meter for your batteries. The kit includes the sense module, sense and communication cables, and a 500 amp shunt. Requires a Magnum inverter with a “Network” port and a ME-RC (revision 2.0 or higher) or ME-ARC remote control. Works with Magnum ME, MS, MS-AE and RD Series inverter/chargers.