Victron SmartShunt IP65 500A / 50mV  - Bluetooth Enabled Every System using batteries should always have a SmartShunt Fitted, these are very Quick and Simple to install and give you real-time battery information and load usage information. once fitted the SmartShunt takes away the guess work from looking at battery state of charge by voltage, and gives you an easy to understand and accurate State of Charge by Percentage (%) and time remaining.  IP65 Water Proof - ideal for Boats and Marine Environments Alternative to BMV-712 Battery Monitor Smart Enabled Bluetooth for VictronConnect App GX Device Connectivity via VE Direct Port SHU067150050 / SHU065150050 Smart Battery Shunt IP65 Water Proof Rating The SmartShunt all in one battery monitor, using your phone as the display. using Bluetooth to connect to the VictronConnect app on your phone  Ideal for Monitoring batteries on your boat, or in damp conditions thanks to the IP65 rating  Alternatively this can be connected and be read by a GX device. Connection is made via a VE.Direct cable. Great alternative for a BMV battery monitor, especially for systems where battery monitoring is needed.