Collection: Monitoring & communication

The monitoring and communication instruments for battery systems: Simarine PICO systems with display, SC303 shunt modules of 300A, ST107 modules for tank levels and auxiliary voltages, SDI01 inclinometers, plus Marstek CT002 three-phase smart meters on DIN rail and CT003 with P1 socket, WiFi and Bluetooth.

A shunt is the only way to really know a lithium battery's state of charge: the resting voltage of a LiFePO4 barely moves between 20% and 90%, so the current in and out has to be counted. From that the system works out Ah left, estimated runtime and cycle history.

What matters here is the number of channels, the shunt current and the protocols available, from NMEA 2000 to Modbus.