Meters can be assigned an ID number between 1 and 8, defining their role within the system.
The ID1 meter is always the main grid meter, while ID2–ID8 are used for monitoring additional devices.
Meter Roles
ID – ID1
Function – Main grid import/export meter
Typical Use Case – Monitors total property energy flow
ID – ID2
Function – Secondary generation or device meter
Typical Use Case – Tracks external PV generation
ID – ID3–ID8
Function – Reserved for future integrations
Typical Use Case – Potential for EVs, heat pumps, etc.
Example Setup
- ID1 (Grid): Measures total property load and grid import/export.
- ID2 (PV String): Measures an external PV system’s generation before the inverter.
The inverter uses both meters to optimise battery charge/discharge and overall energy balance.
Notes
- Only ID1 communicates directly with the inverter.
- ID2 meters are bridged to the same voltage reference as ID1 for accurate phase correlation.
- ID2 CTs must clamp the PV inverter’s live feed, arrow pointing toward property load.