Enphase
Metering / Energy Measurement Inaccuracy
Enphase app shows incorrect energy usage or charging session data compared to vehicle or utility 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
Faulty internal current sensor calibration, Incorrect CT orientation (for external CTs), Firmware bug in energy calculation, Timekeeping errors affecting kWh aggregation
How to Fix / Troubleshooting
Note: This affects reporting and billing, not basic charging.
- Compare over time: Check discrepancies over several sessions to rule out one-off anomalies.
- Verify CT installation: For systems using external CTs, have an electrician confirm correct orientation and placement.
- Firmware update: Ensure the charger is running the latest firmware, which may include metering fixes.
- Factory reset (if acceptable): Reset configuration and re-onboard the charger to clear corrupted data.
- If still inaccurate: The internal metering IC or CTs may be out of tolerance and require board or sensor replacement.
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Repair Difficulty
Medium
3/5
Required Part
Enphase EV Charger Metering Circuit / CT Sensors
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