Victron Energy's Smart BatteryProtect protects the battery by disconnecting it from non-essential loads before it is completely discharged (which would damage it) or before it does not have enough power left to crank the engine. When using Bluetooth to program the Smart BatteryProtect, you can configure any on/off level you want. Alternatively, you can also configure one of nine preset on/off levels using the programming pin. If applicable, Bluetooth can be disabled. The BatteryProtect feature is not designed for reverse currents from charging sources. Features Protects the battery from over-discharge and can be used as a system's on/off switch Smart BatteryProtect protects the battery by disconnecting it from non-essential loads before it is completely discharged (which would damage it) or before there is not enough power left to crank the engine. The on/off input can be used as an on/off switch for a system. When using Bluetooth to program the Smart BatteryProtect, you can configure any on/off level you want. Alternatively, you can also configure one of nine preset on/off levels using the programming pin (see instruction manual). If applicable, Bluetooth can be disabled. Victron offers you a complete range of cutting-edge products that can meet your expectations. Each of these can be tailored to your specific needs.