This is the latest version of the BMV Amp Hour Meter, now called the BMV712. It replaces the BMV702 that went before it by adding built in Bluetooth. It keeps track of current flowing in and out of a battery bank and uses a sophisticated algorithm to read out the state of charge of the battery in Percentage Remaining and Amp Hours Remaining. It also displays Volts and Amps, time to go, and Consumed Energy and keeps track of Historic Data including Battery Efficiency, Average Discharge, Deepest Discharge, Number of Cycles, Overvoltage, and Undervoltage Alarms.
The primary advantage of the BMV 712 over the BMV 702 and separate Bluetooth Dongle is that by building in the Bluetooth component into the meter the VE Direct port is available for other uses (eg connecting to the Color Control GX)
A note about the voltage limit of this unit: 70 Volts is the maximum allowed voltage and not 95 Volts as listed in their literature. Their literature will be corrected.