Electric cars get a rough deal in the press. One day they're the future of motoring; the next, they're stranded on the hard shoulder with a flat battery and a three-hour wait for a charger. The reality, as always, sits somewhere in the middle — and as someone who works on vehicles every day here in Stevenage, I want to give you an honest, numbers-backed picture rather than a sales pitch.

My view? Electric cars are fundamentally very good to drive and genuinely cheaper to run day-to-day. But two things still hold them back: battery degradation and resale value. Both are improving, but they remain legitimate concerns you shouldn't brush under the carpet. This guide pulls together the latest data so you can make your own call.

Battery Life: What the Real-World Data Actually Says

The biggest fear people have about electric cars is the battery. And honestly, it's a legitimate one — because unlike a worn set of brake pads, a degraded battery doesn't just affect how the car feels, it directly hits your range and your resale value.

Here's the good news, backed by hard numbers. Geotab, a telematics company, analysed data from more than 22,700 electric vehicles across 21 makes and models. Their 2025 study found an average battery degradation rate of just 2.3% per year. At that rate, a typical EV battery retains around 81.6% of its original capacity after eight years — and the projected lifespan is 13 years or more.

Put another way: if you buy a new EV with a claimed range of 280 miles today, you'd expect it to cover around 228 miles on a charge at the eight-year mark. That's still perfectly usable for most daily driving.

What accelerates battery degradation?

Not all batteries age equally. The Geotab study identified fast charging as the single biggest stressor: vehicles that relied heavily on DC fast chargers above 100kW degraded at up to 3.0% per year, compared to just 1.5% for those primarily using slower AC home charging. Hot climates add roughly 0.4% more degradation per year. The practical takeaway for UK drivers — where the climate is mild and most charging happens overnight at home — is that your battery is likely to age more slowly than the average.

Resale Value: Still the Achilles' Heel

I won't sugar-coat this one. Resale value is where electric cars are still genuinely weaker than their petrol equivalents, and it's the concern I hear most often from customers thinking about making the switch.

The headline figures for 2026, according to Cox Automotive and Cap HPI data, show average EV depreciation sitting at 38–42% after three years, compared to 35–40% for equivalent petrol vehicles. The gap has narrowed considerably from the horror stories of 2022–23 (when some budget EVs lost up to 50% in their first year), but it's still real.

Why are EVs still depreciating faster?

The main culprit right now is supply, not demand. Large volumes of EVs that went through salary sacrifice schemes and corporate fleets in 2022–24 are now coming off three-year contracts simultaneously and flooding the used market. The ZEV mandate is also pushing manufacturers to discount new EVs aggressively to hit zero-emission sales targets — and every new-car price cut drags down the value of used equivalents on the forecourt.

Looking ahead, the expectation is that EV residual values will stabilise and improve as the new-car supply surge normalises, battery technology matures, and as the 2035 ban on new petrol and diesel sales approaches. At that point, used petrol cars will face their own wave of accelerating depreciation as buyers shift focus to EVs — and the balance may tip the other way.

Running Costs vs Petrol: Where EVs Win Clearly

This is the number that should make up anyone's mind once you get past the purchase price. The fuel cost difference is dramatic.

For a driver covering 10,000 miles per year who can charge at home overnight on an EV-specific tariff, the fuel saving alone is roughly £800–£1,500 per year compared to petrol. Over a three-year ownership period, that's £2,400–£4,500 back in your pocket — more than enough to offset the narrowing depreciation gap for many drivers.

The important caveat: home charging matters enormously

The economics shift significantly if you rely on public rapid charging. While the public network is large and growing, public rapid charging can cost 50–80p per kWh — at which point the per-mile cost becomes comparable to or more expensive than petrol. The genuine sweet spot for EV ownership is home charging, ideally overnight on an off-peak EV tariff (7–10p per kWh).

The overall picture for private buyers who charge at home: EVs typically save £500–£1,000 per year on running costs once fuel, servicing, and road tax are factored in. For company car drivers, the BiK tax advantage (4% for EVs vs up to 37% for high-emission petrol) makes the case even stronger.

Charging Infrastructure: Better Than You Think

The "range anxiety" argument against EVs is much weaker in 2026 than it was even two years ago. As of May 2026, there are over 121,000 public EV chargers across more than 46,000 locations in the UK — a figure that now exceeds the number of petrol station fuel pumps nationwide. The network grew by 13% in 2025 alone, with ultra-rapid chargers (150kW+) growing by an impressive 40%.

The honest caveat is that public charging coverage is still geographically uneven. London has 338 public chargers per 100,000 residents — double the UK average of 168. Rural areas, particularly in the North East and parts of the South West, remain underserved. If you live somewhere remote and don't have off-street parking, the EV case weakens considerably.

Can Your Local Independent Garage Still Service an EV?

This is a question I get a lot, and the answer is: yes — if they have the right qualifications. And it matters, because dealer servicing for EVs typically costs 40–50% more than a qualified independent.

Under UK consumer law (the Block Exemption Regulations), you are not required to use a main dealer for servicing, even if your car is under warranty — as long as the work follows the manufacturer's service schedule and the garage uses appropriate parts. The government has confirmed that warranty cannot be automatically voided simply because servicing was carried out outside the dealer network.

Since 2024, independent garages certified under IMI EV Technician Level 3 can legally service electric cars, including work on high-voltage systems. The industry body HEVRA also operates a network of specialist independent EV garages across the UK. As of 2025, there are more than 52,000 qualified EV technicians in the UK, with the numbers growing rapidly.

What does EV servicing actually involve?

Electric cars have fewer moving parts than petrol vehicles, which means servicing is actually simpler in many respects — no oil changes, no timing belt, no exhaust. The key checks are:

What about hybrids?

Hybrid and plug-in hybrid (PHEV) vehicles are in many ways the sweet spot right now for drivers who aren't quite ready to go full electric. They carry smaller high-voltage battery packs (with voltages typically up to 300–700V in PHEVs), which means they require specialist tools and certified technicians — but any independent garage with IMI hybrid certification can carry out the work. Many customers assume hybrid vehicles mean main dealer only. That's not the case at all.

Hybrids don't suffer from the same range anxiety issue as pure EVs, they tend to hold their residual values strongly at present, and for drivers who do a lot of short town trips with the occasional longer run, they offer a practical middle ground. Their servicing needs combine elements of both petrol and EV maintenance, but — done by the right garage — they're no more complex or expensive to look after.

Should You Switch? The Honest Decision Guide

There's no universal answer. Here's how to think through your own situation:

If you're genuinely on the fence, a mild or full hybrid is a sensible step. You get real-world fuel savings, lower emissions, no range anxiety, and you keep the flexibility of a petrol engine for longer trips. Hybrids also service well at independent garages, hold their values strongly at present, and give you time to watch the EV market mature before committing.

Frequently Asked Questions