Mecer Axpert MKS IV 48V Off-Grid Inverter SOL-I-AX-5M4. Inverter for a compatible battery-based off-grid system. Model SOL-I-AX-5M4 from the Axpert MKS IV range. 48V battery platform with pure sine-wave output and built-in MPPT solar charging. Includes a colour LCD, Wi-Fi monitoring and a reserved BMS communication port. Intended for professionally designed off-grid power systems.