The Victron BMV battery monitor  range are a group of high precision battery monitors. Their essential function is to calculate ampere hours consumed and the state of charge of a battery. Think of these monitors as your battery ‘fuel gauge’, with a time-to-go indicator and much more. 
Each model comes with a square bezel overlay (if you wish a square gauge look as opposed to round), a securing ring for rear mounting and screws for front mounting. 
Any model can be mounted in a panel of your choice with a 52mm (2.0 inch) aperture or in one of Victron’s optional bespoke wall enclosures. 
A 500A/50mV shunt, fitted with a quick connect PCB is part of every product package. Alternative shunts are available if required. 
All models come with 10m of 6 core UTP cable with RJ12 connectors and a power supply cable complete with fuse. 
The 702 & 712 has the same features as the 700 but in addition it has an auxiliary input. This can be used to measure the voltage of a second battery, or temperature using the temperature accessory, or midpoint voltage. 
Where noted as Dual battery Bank this is using the above auxiliary input to monitor the voltage of another battery bank,