Used-EV warranty sales are surging, but the battery may not be covered

British used-car buyers have started buying protection for electric cars faster than the warranty industry has ever sold it. RAC Warranty moved more than 15,000 used-EV policies in the first half of 2026. That already beats the nearly 13,000 sold during all of 2025 and is close to twice the roughly 8,000 recorded in 2024.

There is a catch hiding inside that reassuring headline. An electric-vehicle warranty and a traction-battery warranty are not necessarily the same product. RAC's original specialist cover was explicitly designed around the long battery warranty supplied by the carmaker, and excluded the battery itself. In other words, the extra policy could be valuable precisely because it covers the expensive hardware around the pack, while leaving the component buyers fear most to somebody else.

The sales jump is partly a confidence story and partly simple arithmetic. Large numbers of fleet EVs are entering the used market. Lee Coomber, RAC client director at warranty partner Assurant, said those cars are meeting growing demand from consumers interested in lower running costs. For many, it is their first electric car, so a familiar warranty brand helps a dealer close the sale.

It does not show that 15,000 cars are unreliable. Nor does it tell us how many claims were accepted or what the average payout was. Policy sales measure exposure and buyer nerves, not failure frequency.

That distinction matters because anxiety is running far ahead of the available battery data. August's Startline Used Car Tracker found 77% of potential buyers worried about battery failure and 76% worried about the repair bill. Fifty-seven per cent said they would not buy a used EV without an independent battery check. Yet a US Department of Energy summary of 15,000 plug-in vehicles found battery replacements caused by failure, excluding recalls, occurred in 1.5% of the 2011-to-2023 sample. For model years 2016 onward the rate was well below 1%, with most failures occurring while manufacturer cover still applied.

A rare pack failure does not make an ageing EV free of repair risk. Warranty Solutions Group launched its own direct-to-consumer EV product this month for cars beyond their factory cover. Its claims data puts the average EV labour rate at £92.04 an hour and an average charging-port repair at £1,881. Charging electronics, sensors, thermal-management hardware and power electronics can generate serious bills without a single battery cell failing.

That is where aftermarket cover can earn its premium. The RAC product introduced in 2021 covered major electric drivetrain and charging-system components but excluded the traction battery because manufacturers generally covered it for about eight years and 100,000 miles. A 2026 buyer cannot assume every current RAC policy has identical terms, but the product history exposes the question that needs asking: is the policy filling gaps around an active factory battery warranty, or is the battery now outside both?

The calendar is especially important. Battery cover normally starts on the car's first registration date, not the day the second owner collects it. AAA notes that battery warranty has an unusually strong effect on used-EV value because a full replacement may cost US$7,000 to US$25,000. The buyer needs the original in-service date, mileage limit, capacity threshold and transfer rules, not merely a dealer's statement that the car is warrantied.

Mechanical breakdown warranties also should not be confused with comprehensive motor insurance. The former may pay when a listed component fails internally. The latter may cover battery damage caused by a crash, fire, theft or storm. Neither normally pays for gradual loss of usable capacity unless a specific capacity guarantee says it will.

Fresh collision data makes the separation less frightening than it once looked. Mitchell's second-quarter 2026 figures put average US repair severity at $5,684 for repairable battery-electric claims and $4,955 for combustion vehicles, a record-low gap of $729. EV estimates still directed 85% of parts spending to original-equipment parts, versus 61% for combustion cars, and shops repaired slightly fewer parts rather than replacing them. The premium has narrowed, but restricted parts choice can still stretch a bill and the time off road.

A used-EV buyer should ask for four items in writing: the manufacturer's remaining battery terms; a current independent state-of-health report; the aftermarket warranty schedule with its exclusions and per-claim limit; and the motor-insurance wording for traction-battery damage. Check whether diagnostic time, fluids, software, charging sockets, onboard chargers, inverters and thermal-management components are listed. Ask who authorises the repair, which garages may do it, whether labour rates are capped and whether an excess applies.

Then compare the policy price with the actual uncovered risk. A car with three years of transferable factory battery cover may benefit more from protection for its charging hardware than from a vague promise about the battery. An older car whose pack sits outside every warranty demands a different price, a stronger health report and a credible local repair route.

The record sales figure says the used-EV market is becoming ordinary enough to support a busy warranty business. The fine print decides whether that business is selling useful risk transfer or merely a comforting word on the windscreen.