The used EV market is growing fast. But battery degradation, charging compatibility, and rapidly-changing technology mean buyers need to know what they're looking at.
A used EV is fundamentally different from a used petrol car in one critical respect: the battery is both the car's most valuable component and its most significant potential liability.
Battery Health Checks
Most modern EVs display a State of Health (SoH) figure in their settings or through an OBD port. A battery retaining 85% or more of its original capacity is generally considered healthy for its age. Below 75%, expect noticeably reduced range.
"Battery degradation is not linear. Batteries that have been frequently fast-charged, regularly depleted to near-zero, or left at 100% charge for extended periods degrade significantly faster than those used more carefully."
Which EVs Hold Up Best
- Renault Zoe (post-2020 ZE50): consistently good battery retention
- Tesla Model 3 (Long Range): best-in-class degradation figures
- Nissan Leaf (40kWh and above): improved over earlier 24kWh versions
- Hyundai Kona Electric: strong real-world range retention
- BMW i3: premium build quality but limited range even when new
What to Avoid
Early Nissan Leaf (24kWh, pre-2016) models with passive thermal management are the clearest example of poor battery retention in the UK market. Original 84-mile range cars may now deliver 50 miles or less. Always check capacity figures against the original specification.
Alfie has over 11 years of experience in the motor trade and founded Alfa Prestige to give buyers the insider knowledge that was previously only available to professionals.
