Connecting the ShuntMon to WatchMon4

ShuntMon works with either WatchMon4 and WatchMon1 and typically comes in your starter kit with a cable labelled “yellow”, connect the cables as per photos below:

Follow the picture below as the wiring diagram: 

  • Maximum Battery Voltage = 650v DC
  • Current = 500A


Shuntmon can be connected to either WatchMon1 or Watchmon4 using the same wiring sequence:

Connection on Shuntmon

Communication 4 pin port:

Pin Colour Function
1 Red Isolated 5vdc supply
2 Green Isolated TX to WatchMon
3 Yellow Isolated RX from WatchMon
4 Black Isolated Ground


Voltage sense 2 pin port:

Pin Colour Function
1 (spare) 
2 Red Battery Positive


Battery Current terminals

Pin Function
LEFT Battery load - to inverter/charger
RIGHT Battery Neg - from cells


Connection on Watchmon

Terminal strip connections are as follows:

Pin Colour Function
12 Red 5vdc supply
13 Green RX from Shunt
14 Yellow TX to Shunt
15 Black Ground


Link to ShuntMon product page

Can we use our own Shunt Block?

Watchmon4 - Product page

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