The device reports measured voltage and current, calculated health and charge state, and user programmed static data (e.g. nominal capacity and chemistry) to NMEA 2000 and can turn on the genset or warn when the battery state is critical. The Battery Monitor can be used with any single DC source (i.e. alternator, wind generator, etc.) or load (windlass, refrigerator, etc.), but it is primarily designed for monitoring a marine battery.