Mecer Axpert King 5K 5000VA / 5000W hybrid pure sine Wave inverter Rack Mount, MPPT solar charge controller 4000W 80amp (Solar panels not included), 220V AC Input, 48V DC battery Input – requires deep cycle batteries (Batteries not included), 60amp AC battery charger, Overload and short Circuit protection, Configurable AC/solar Input priority, 12.2kg, Up to 9 of these unit can be connected in parallel, 0 ms transfer time, Power Factor 1, Detachable LCD control module with multiple communications. *Please take note of connection: Connect RED cable to ( ) on battery and the ( ) on the unit, and BLACK cable to (-) on battery and the (-) on the unit. Place cable lug directly onto the battery terminal first, follow up with the washer and then the lock washer, and then the nut. Do not put a washer between the battery terminal and cable. Connect the positive cable first. Follow instructions in manual.