A Victron Energy BMV-700 battery monitor acts as your battery's ‘fuel gauge’, time-to-go indicator, and much more: Standard features: Displays battery voltage, current, power, ampere-hours consumed and state of charge Remaining time at the current rate of discharge Programmable visual and audible alarm Programmable relay, to turn off non critical loads or to run a generator when needed 500 Amp quick connect shunt and connection kit Shunt selection capability up to 10,000 Amps VE.Direct communication port Stores a wide range of historical events, which can be used to evaluate usage patterns and battery health Wide input voltage range: 6.5 – 95V High current measurement resolution: 10 mA (0.01A) Low current consumption: 2.9Ah per month (4mA) @12V and 2.2Ah per month (3mA) @ 24V BMV-702 additional features: Additional input to measure voltage (of a second battery), temperature or midpoint voltage, and corresponding alarm and relay settings.