Battery Monitor Selection

I have an MPPT and a GX but want to see my battery state of charge on the VRM. I assume I need a BMS but which one? 400watts solar and 2 100amp/hour batteries in series. Thanks

This depends on your battery type. For a simple setup, a smart shunt or BMV series monitor will be fine.

AGM Batteries. Something like this? Amazon.com: Victron Energy Smart Battery Sense, Voltage and Temperature Sensor, Long Range (up to 10m) : Patio, Lawn & Garden

The Smart Battery Sense only reports voltage and temperature and not state of charge. Additionally, it does not interface with GX devices. Not suitable for the original request.

OK then, this? Amazon.com: Victron Energy Smart Battery Shunt - Battery Monitor (Bluetooth) - Victron Smart Shunt with Detailed in-app Insights - 6.5V-70V, 300 amp : Automotive

Yes, smart shunt will provide soc

Thank you!