Walli
Energy Meter Calibration / Measurement Error
Walli charger energy readings in the app are clearly inaccurate compared to a separate meter.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Misconfigured internal meter (wrong phase or CT direction), Faulty internal energy meter, Firmware bug in reporting, External CTs installed backwards on load management system
How to Fix / Troubleshooting
Safety first: Metering errors do not directly affect safety but can impact billing.
Steps:
- Compare over time: Measure energy with an external calibrated meter over several sessions to confirm consistent error.
- Check configuration: In the installer settings, verify meter type, CT ratio, and phase mapping.
- Inspect CT orientation: Ensure external CTs (if used) are oriented correctly with arrows pointing toward the load.
- Firmware update: Apply any firmware updates that address metering accuracy.
- Replace meter: If inaccuracies persist, replace the Walli internal energy meter module.
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Repair Difficulty
Medium
3/5
Required Part
Walli internal energy meter
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