EU battery passport: what to check when buying a used EV

In the European Union, EV batteries placed on the market or put into service from 18 February 2027 will need a digital battery passport. When buying a used electric car, check whether its battery is covered and ask for a dated battery health report and supporting records.

2 min read
An electric car plugged into a charging station
In this guide
  1. Which batteries will need a passport in 2027?
  2. What can you see by scanning the QR code?
  3. How do you check the battery before signing?
  4. Which documents should you keep?

In the European Union, EV batteries placed on the market or put into service from 18 February 2027 will need a digital battery passport. When buying a used electric car, check whether its battery is covered and ask for a dated battery health report and supporting records.

Which batteries will need a passport in 2027?

Article 77 of Regulation (EU) 2023/1542, adopted on 12 July 2023, sets the deadline. It applies when the battery is placed on the market or put into service. The date you buy the used car therefore cannot determine whether a passport is required. First registration offers a clue. If the pack has been replaced, ask for the installed battery’s reference and the repair paperwork.

EU Batteries RegulationOpens external site

What can you see by scanning the QR code?

The QR code opens an electronic record linked to a unique identifier. Annex XIII distinguishes public model information, such as rated capacity, from restricted data. The individual battery’s state of health is in the restricted category. The European Commission’s FAQ explains the access categories. Seeing a QR code does not guarantee access to every field.

European Commission FAQOpens external site

How do you check the battery before signing?

Ask for a report that ties the result to the vehicle or installed pack. Note the date, mileage, method and measured value. If the report shows a state of health (SoH) percentage, ask what it measures and which baseline it uses. Dashboard range also depends on estimated energy use. Consider it in light of your regular routes and charging options.

Which documents should you keep?

Request invoices for battery work and the applicable warranty terms, including time left and transfer conditions. If the seller cannot provide a recent report, agree on a check before buying. Keep the report, invoices and warranty in the vehicle records so you can explain what was measured or replaced later.

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