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Used EV evidence · UK

Fields a professional EV battery SoH report needs

Request a written State of Health report that identifies the vehicle, test date, mileage, conditions, method and issuer. A complete report can show what metric was produced for that vehicle under stated conditions and against a stated reference. It cannot prove the traction battery has no hidden safety defect or that capacity and range will remain fixed.

Office for Zero Emission Vehicles: Zero emission van and truck grant: preparing battery degradation evidence

Reviewed

Key facts and evidence

For a UK used EV, reviewed 13 August 2026, a professional State of Health report is useful only when it identifies the vehicle, mileage, date, state of charge, temperature, test conditions, method, tool or software, metric, reference, stored faults, limitations and issuer competence. Even then, it is evidence from one assessment, not proof of battery safety or fixed future performance.

Office for Zero Emission Vehicles: Zero emission van and truck grant: preparing battery degradation evidence

Check a professional State of Health report for vehicle identity, test context, method, reference value, faults, limitations and issuer competence.

Identity and test context

Match the vehicle identifier and mileage, then retain the date, state of charge, temperature and other test conditions so the result is not detached from its assessment context.

Method and reference

Require the report to name its metric, method, tool or software version and the manufacturer reference or other stated basis used to interpret the output.

What the report cannot prove

One report does not establish freedom from every traction-battery safety defect or fix future capacity and range; stored faults, limitations and issuer competence remain material.

What to do next

A State of Health report does not by itself determine roadworthiness or permission to drive.

Immediate action: Check every required field before using the result in a purchase decision.

  • Treat the result as unverified if identity, date, method, conditions, reference, faults or limitations are missing.

Checks that stay with this vehicle

  1. Check the written report for vehicle identity, mileage, date, conditions, method, tool version, metric, reference, faults, limitations and issuer competence.

    The result can be traced to this vehicle, a defined method and stated assessment conditions.

    Stop relying on the report if any identity, method, reference, fault or limitation field needed for interpretation is missing.

Professional hand-off

  • Commission a fresh report from an independent EV-competent technician or manufacturer-authorised battery specialist when the existing report is incomplete.

Questions this record can answer

What does the sourced evidence say about identity and test context?

Match the vehicle identifier and mileage, then retain the date, state of charge, temperature and other test conditions so the result is not detached from its assessment context.

What does the sourced evidence say about method and reference?

Require the report to name its metric, method, tool or software version and the manufacturer reference or other stated basis used to interpret the output.

What does the sourced evidence say about what the report cannot prove?

One report does not establish freedom from every traction-battery safety defect or fix future capacity and range; stored faults, limitations and issuer competence remain material.

Sources