Hybrid inverter UM-V3 5000 W 48 V MPPT BluetoothWorks with and without batteries: It offers conventional battery operation, but also has the option of operating without batteries. The system supplies the loads directly from the solar panels' output, as long as consumption is lower than solar production. If consumption exceeds solar production, the device triggers warning 15 indicating insufficient PV panel power and feeds into the grid if available to avoid power outages. Solar panel input up to