Used EVs are genuinely good value right now. The market has overcorrected, prices have dropped, and a well-maintained EV with a healthy battery is one of the cheapest cars to run in the UK. But the battery is the one thing you cannot see, and it is the most expensive component to replace. This guide tells you exactly what to check before you hand over your money.
gov.uk/check-mot-history shows every MOT result, mileage recorded at each test, and any advisories. Inconsistent mileage readings, lots of advisories, or long gaps in MOT history are all red flags worth questioning before you waste a journey.
Most sellers will send a photo of the dash or their charging app. This tells you nothing definitive about battery health, but it gives you a starting point for the conversation, and how they respond tells you a lot about how confident they are in the car.
Not every EV is covered by every test. Use the PAD coverage checker to confirm the car you are viewing can be independently tested before you arrange a viewing. Check coverage here.
Signs of heavy wear around the DC rapid charge port — scorch marks, worn contacts, damage — suggest frequent rapid charging which accelerates degradation, especially on Nissan Leafs without thermal management.
Any battery, charging, or EV system warning lights on cold startup are immediate red flags. Take photos before the seller starts the engine.
Home slow charging overnight to 80% is ideal. Regular motorway rapid charging to 100% is the worst case. Evasive or inconsistent answers here warrant further investigation.
Garaged EVs in moderate climates degrade slower. EVs kept outdoors in high heat degrade faster, particularly passive-cooled models like the Nissan Leaf.
Every EV has a standard 12V battery that powers accessories and systems. They fail more often than people expect, cause phantom faults, and cost £150 to £250 to replace. A PAD pre-purchase check tests this as standard.
Range estimates on the dashboard are influenced by recent driving patterns. A car showing 200 miles of range after a slow motorway run means nothing. Only a certified SOH test tells you real remaining capacity.
The number on the dashboard comes from the car's own Battery Management System. It is the car estimating its own health. The BMS can compensate for weaker cells by limiting their use, meaning the displayed SOH can look reasonable while underlying cell degradation is worse than the number suggests.
An Aviloo test is a cell-level measurement performed by an independent instrument, not relying on the BMS output. It is the same standard used by major European insurers and auction houses. The result cannot be altered by a software update or reset by a dealer.
A battery result below 85% gives you a concrete, certified reason to negotiate price down. A result above 88% means you can walk away with confidence or use it to beat competing offers. Either way, £79 is cheap information on a £10,000 to £30,000 purchase.
Battery degradation varies significantly by model, chemistry, and usage history. These guides cover what to look for on the most common used EVs in South Wales.
No. The dashboard reading and any OBD app screenshot comes from the car's own Battery Management System. It is the car reporting on itself. An Aviloo test is independent, cell-level, and TUV certified. The two numbers frequently differ by 3 to 8 percentage points, sometimes more.
85% or above is generally healthy. Below 80% you will notice real daily range impact. For a 3 to 4 year old Nissan Leaf, 82 to 90% is typical. A Kia e-Niro of the same age typically shows 87 to 94%. Anything below 80% is an Aviloo Red Flag and should significantly affect the price you are willing to pay.
Most private sellers will agree if you are a serious buyer. A seller who refuses a pre-purchase check on an EV is telling you something. PAD comes to the seller's address, the test takes 20 minutes, and the seller does not need to be present for the whole process. It is as unintrusive as it gets.
A standard pre-purchase check with PAD is £35, covering OBD scan, 12V test, and visual inspection. Adding the Aviloo battery certificate brings the total to £79. PAD is mobile and comes to the seller's address across South Wales. Travel fees apply outside 10 miles of Pontypridd at the standard rate.
PAD comes to the seller's address across South Wales. Standard check £35. EV pre-purchase with Aviloo battery certificate £79. Results before you commit.
