Introduction:
If the display on your eddi constantly shows "Waiting for Surplus" and the export power is reading as 0W, this indicates that the system is not using any surplus power. This can result from incorrect installation or a faulty grid sensor. Follow the checks below to identify the cause.
Installer-only work
Only a qualified installer should remove the top cover of the eddi or access internal wiring. End users must not open the unit or perform any electrical checks. Any step that involves live wiring or using test equipment must be completed by the installer.
Symptom:
- The eddi display shows "Waiting for Surplus".
- The export power remains at 0W.
Possible Causes:
- Grid sensor incorrectly installed – The grid sensor may not be correctly connected to the eddi or harvi, preventing surplus detection.
- Faulty grid sensor – A damaged or malfunctioning grid sensor may fail to report surplus correctly.
- No signal from harvi (if used) – Communication issues between eddi and harvi can prevent readings.
Step-by-step checks:
1. Check the grid sensor connection
- The installer should ensure the grid sensor is connected to the CT1 terminals of the eddi or harvi.
- Loose or disconnected wires can cause a 0W export reading.
2. Confirm correct sensor installation
- The grid sensor must be fitted to the correct live cable of the supply.
- Only an installer should reposition or refit the sensor.
3. Test the grid sensor resistance
- The installer can use a multimeter to measure resistance.
- A correct reading is approximately 200Ω when disconnected. If significantly different, replace the sensor.
4. If using harvi, check CT input settings
- In the harvi settings, ensure the CT input is set to Grid.
- Check under Devices in the eddi menu to confirm the correct configuration.
Additional troubleshooting tips:
- Inspect for damage: The installer should check for visible cable wear or cuts. Replace if damaged.
- Check for interference: Nearby electrical equipment may cause inaccurate readings.
- Recalibration: The installer may recalibrate the eddi or harvi if readings remain incorrect.
Conclusion:
If the eddi continues to show "Waiting for Surplus" with 0W export, the most common causes are grid sensor connection or sensor failure. End users can check display values and settings, but only a qualified installer must carry out physical or electrical work. If the issue persists, contact myenergi technical support for guidance.