Samlex Waterproof Battery Guard - 200 Amps [BGW-200]Waterproof Battery Guard 200 Amps The complete universal programmable Battery Guard (BGW) prevents the excessive discharge of the battery (which would damage the battery) and protects electronic appliances against overvoltage. The BGW 200 battery guard has "Automatic Board System Detection"; the BGW automatically detects the battery voltage (12 or 24 V). The BGW 200 battery guard can carry a 200 A continuous load and a 1000 A peak current at 25