3 Phase - Inverter Load Increasing When Exporting

CT/Eastron troubleshooting process should be followed in the first instance if any incorrect readings are showing. 

If readings are all correct when importing from the grid, but enabling export causes the load to increase this may be caused by incorrect phase rotation.

This has been observed in cases where the L1, L2 and L3 live cables were connected to incorrect terminals on the inverter. It is possible that the phases can be mislabelled when the supply is initially set up so just following the cable run isn't a guarantee that the phases are correct.

N.B. if the phase rotation direction is incorrect this will result in a fault code. If the rotation direction is correct but the L1, L3 and L3 are not in the correct order this is when you will see export causing the load to increase.

How to Test Phase Readings

Installer will require a clamp meter to read L1, L2 and L3. Try to limit load to a predictable or consistent amount if possible to keep readings accurate such as an electric heater or kettle.

Click the AC Load dial at the top right of the home screen to view the current reading on L1, L2 and L3, check whether the loads are matching closely to the clamp meter to determine how accurate they are. It is also advisable to have PV isolated and set battery target SOC in the current system timer to 100% to ensure that all power is coming in from the grid and readings won't be affected by any export.