Rolec
Energy Meter Calibration / Measurement Error
Charger’s built‑in kWh readings or app energy reports are clearly inaccurate compared to the vehicle’s reported energy.
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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
Internal MID meter mis‑calibrated or faulty, Incorrect CT orientation or ratio, Loose meter communication wiring, Firmware bug in energy calculation
How to Fix / Troubleshooting
Safety first: Measurement errors do not usually affect safety but may impact billing or monitoring.
- Compare over time: Measure energy over several full charges and compare with the vehicle’s reported kWh to confirm consistent error.
- Check CT orientation: Ensure the CT clamp arrow points in the correct direction relative to current flow.
- Inspect meter wiring: Verify that the internal meter’s current and voltage connections are correct and secure.
- Firmware update: Apply any available firmware updates that address metering accuracy.
- Replace meter or CT: If errors persist, replace the internal MID meter or CT clamp as appropriate.
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Repair Difficulty
Medium
3/5
Required Part
Internal MID energy meter
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