Electric vehicles sold in Great Britain are moving toward a new era of transparency. From late 2027, new Euro 7 requirements will introduce minimum battery-durability standards for electric cars and plug-in hybrids, alongside broader rules covering vehicle emissions, brakes and tyres.

For consumers, one of the most important changes concerns battery health. Instead of relying mainly on manufacturer warranties or specialist inspections, buyers should gradually gain access to more consistent information about how much usable battery capacity remains as a vehicle gets older.

Battery Capacity Gets A Minimum

Electric cars and plug-in hybrids covered by the new rules will need to retain at least 80% of their original battery capacity after five years or 100,000 km, whichever comes first.

Between that point and eight years or 160,000 km, the minimum threshold will fall to 72%.

Vans will operate under slightly different requirements. Their batteries must retain at least 75% of their original capacity after five years or 100,000 km and 67% after eight years or 160,000 km.

These figures are minimum standards rather than predictions of normal degradation. A well-maintained battery may retain considerably more capacity.

Used EV Buyers Could Benefit

Battery condition remains one of the biggest uncertainties surrounding second-hand electric cars.

Mileage alone cannot reveal how an EV has aged. Two cars with identical odometer readings may have experienced very different charging patterns, temperatures and driving conditions.

The new framework is intended to make battery-health information more consistent across manufacturers and models.

Industry representative Toby Poston has argued that a common durability benchmark could strengthen confidence in used electric vehicles by allowing buyers, dealers and leasing companies to compare battery condition more easily.

He has also suggested that easier access to battery-health information, whether through the vehicle itself or diagnostic systems, could remove one of the major uncertainties facing second-hand buyers.

The Change Starts In 2027

The government plans to introduce the new standard for mainstream new light-duty vehicles in Great Britain from November 29, 2027.

Small-volume manufacturers will receive additional time, with their requirements taking effect from July 1, 2030.

The rules will apply to newly approved and registered vehicles rather than suddenly changing the requirements for every electric car already on British roads.

As a result, the impact on the used market will develop gradually. Euro 7 vehicles will first need to spend several years on the road before large numbers begin appearing as second-hand models.

Euro 7 Is About More Than Batteries

Battery durability is only one part of the new standard.

Euro 7 also expands attention beyond traditional exhaust emissions. Limits will increasingly cover particles produced by brake wear and tyre abrasion, sources of pollution that remain relevant even as more vehicles become electric.

Electric cars produce no tailpipe emissions, but they still use tyres and friction brakes. Regenerative braking can reduce conventional brake use, yet it does not eliminate non-exhaust pollution entirely.

The broader goal is therefore to measure vehicle environmental performance throughout more of its working life.

Battery Health Could Become A Selling Point

The new rules may also change how used EVs are valued.

Today, age and mileage remain the most familiar indicators when comparing second-hand cars. In the future, remaining battery capacity could become equally important.

A vehicle retaining 90% of its original capacity after several years may command a different price from an otherwise similar model closer to the regulatory minimum.

That could reward cars that have aged well and make battery condition a visible part of resale value.

For drivers considering a used EV, the change could make one of the most expensive and least visible components of the vehicle much easier to understand. As electric cars become a larger part of the second-hand market, knowing how much battery life remains may soon feel as normal as checking mileage or service history.