The universal programmable Battery Guard (BG) prevents the excessive discharge of the battery (which would damage the battery) and protects electronic appliances against overvoltage. The BG200 battery guard has an Automatic Board System Detection; the BG automatically detects the battery voltage (12 or 24V). The BG200 battery guard is capable of carrying 200A continuous load and 210A transient load. There is a choice out of 10 on/off threshold voltage programs, for both 12V and 24V battery systems, which can be easily programmed.