E26
Polestar
Output Undervoltage Detected
Charger shows E26; display may indicate ‘Undervoltage EV’; vehicle reports low voltage at inlet.
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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
Severe voltage drop due to undersized supply cable, Loose line terminals, Failing power module, Faulty voltage sensing circuit
How to Fix / Troubleshooting
Safety first: Turn off power before tightening terminals or opening the charger.
- Check supply cable size: Confirm that the cable feeding the Polestar charger is sized according to the installation manual for the charger’s maximum current and run length.
- Tighten terminals: Inside the charger, tighten all line and neutral terminals on the input block and power module.
- Measure voltage under load: An electrician should measure voltage at the charger input and at the vehicle inlet during charging. Excessive drop indicates wiring or module issues.
- Replace module if needed: If supply wiring is adequate but undervoltage persists, the Polestar power module or sensing circuit may be failing and should be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Polestar Power Module
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