
Modbus TCP
Victron Energy (battery)
Victron
Overview
Victron Energy is a leading manufacturer of battery storage and energy management systems built around a GX device such as the Cerbo GX or Color Control GX. This template connects to the Victron Energy (battery) integration via Modbus TCP and reads system-level battery power and state of charge from registers 842 and 843, served by the com.victronenergy.system service at Unit ID 100. It also exposes the writable ESS minimum SoC setpoint at register 2901, allowing automated depth-of-discharge control. Installers can use this template to monitor battery status in real time and adjust energy storage limits remotely through the ModbusCloud Gateway.
Use cases
- Monitor system battery power in real time to detect unexpected discharge patterns during grid outages.
- Track state of charge trends over days and weeks to identify gradual battery capacity degradation.
- Alert on state of charge dropping below a defined threshold to prevent deep discharge events.
- Verify that the ESS minimum SoC setpoint matches the configured site energy management policy.



