EV Charger Error
What Does Precharge Failure (Alpitronic HYC) Mean on an EV Charger?
Updated March 2026
This is general guidance based on Alpitronic. Actual charger behavior varies by manufacturer and firmware version. Always follow on-screen instructions and contact the charging network if you are unsure. If anything looks or feels unsafe, stop charging and move away from the charger.
The Alpitronic Hypercharger failed during the precharge phase. Before DC charging starts, the charger must match its output voltage to the vehicle's battery voltage. If this fails, charging cannot begin.
Seeing this on the charger right now?
- Don't unplug while the charger is active. Wait for the screen to update.
- Try stopping and restarting the session from the charging app or RFID card.
- If the error persists, move to a different connector or charger if available.
Read the full explanation below, or scan the charger screen with EVcourse for instant help.
What to do
- Unplug, wait 30 seconds, and try again
- Make sure the connector is fully seated in the charge port
- If using CCS, try the other CCS connector on the unit if available
- This can be caused by a vehicle-side issue. Try a different charger brand to confirm
Technical details
- Error code
- Alpitronic_PrechargeFailure
- Category
- Electrical
- Classification
- communication
- Source
- Based on data from Alpitronic. EVcourse is not affiliated with Alpitronic.
Related charging terms
Understanding these terms can help you troubleshoot this error:
Seeing this error at the charger?
Drivers can verify this specific error by scanning the screen with EVcourse. The app reads any charger display, any language. Free to try on iOS.
Other errors
From Finn, engineer: This error code is part of the ChargeX MREC standard used across public charging networks. Always follow the instructions on the charger display. If the error persists, contact the charging network's support line or try a different charger.
The EVcourse app provides instant troubleshooting and expert explanations at the charger. Scan any station or car screen for step-by-step help, free to start on iOS.
Don't understand the screen? Scan it.
Point your phone at any charger or car screen for instant help. Any brand, any language. Free to try on iOS.
Free to try on iOS. Android coming soon. Join the Android waitlist.