If you’ve been sitting on the fence about adding more electric vehicles (EVs) to your fleet because of “range anxiety” or worries about battery life, it’s time to take a deep breath.

A massive new study has just dropped, and the results are a huge win for the UK’s used EV market. The Generational 2025 Battery Performance Index, the largest study of its kind, has revealed some seriously impressive data regarding used EV battery degradation.

Let’s dive into what this means for fleet managers and how you can make the most of these findings.

What Does the Largest Used EV Study Tell Us?

For a long time, the big question mark hanging over electric vans and cars has been: “How long will the battery actually last?” Thanks to the Generational 2025 Battery Performance Index, we now have a much clearer picture. After analysing a vast range of vehicles across the UK, the study found that the average battery health for used EVs stands at a whopping 95%.

Key Findings from the Report:

• Slow Degradation: Most EV batteries are losing capacity much slower than originally feared.
  
• Consistency is Key: The study shows that even with high mileage, modern battery management systems are doing a fantastic job of preserving health.
  
• The 2025 Benchmark: This report sets a new industry standard, giving fleet operators the data they need to predict residual values more accurately.

Why This Matters for Fleet Managers

Understanding used EV battery degradation isn’t just for tech geeks; it’s vital for your bottom line. When you know that a three-or four-year-old EV likely still has 95% of its original battery capacity, it changes the game for:

1. Remarketing Values: Better battery health means higher resale prices.
   
2. Total Cost of Ownership (TCO): You can confidently run EVs for longer cycles.
   
3. Driver Confidence: Your team won’t need to worry about losing half their range after a couple of years.

How Fleet Service GB Supports Your EV Transition

Transitioning to a plug-in fleet can feel like a bit of a minefield, but you don’t have to do it alone. At Fleet Service GB, we specialise in helping fleet managers navigate the shift from diesel to electric.

Expert Advice for Your Fleet

We don’t just give you a “one-size-fits-all” answer. We look at your specific routes, mileage, and charging infrastructure to provide actionable advice. Whether you are worried about used EV battery degradation or simply don’t know which charger to install, we’ve got your back.

An EV-Ready Garage Network

Maintenance is often a sticking point for EV adoption. You’ll be pleased to know that our extensive Garage Network is fully EV-ready. Not only that but we offer a National Price Promise to be consistent in our pricing wherever you are in the country. Being EV ready means:

• Certified Technicians: High-voltage trained experts who know EVs inside out.
  
• Specialist Equipment: The right tools to diagnose and maintain battery systems.
  
• UK-Wide Coverage: No matter where your drivers are, they are never far from an EV-competent workshop.

Actionable Steps: Maximising Your Battery Life

While the study shows batteries are doing great, there are still things your drivers can do to keep those battery degradation rates low:

• Avoid “Deep Discharges”: Try not to let the battery drop below 10% regularly.
  
• Smart Charging: Use rapid DC charging when necessary, but stick to slower AC charging for daily top-ups where possible.
  
• Temperature Control: In very hot or cold weather, keeping the car plugged in (if possible) helps the thermal management system protect the battery.

For more tailored support on keeping your drivers efficient and safe, check out our Fleet Service GB Driver Management page.

FAQs About Used EV Battery Degradation

How much do EV batteries degrade per year?

On average, most modern EVs see a degradation rate of about 1% to 2% per year, though the Generational study shows many perform even better than this, maintaining 95% health over several years.

Does rapid charging damage the battery?

Frequent use of ultra-rapid chargers can increase heat, which may slightly accelerate degradation over time, but modern battery cooling systems have made this much less of a concern than it was five years ago.

What is the 2025 Battery Performance Index?

It is the UK’s largest independent study into real-world EV battery health, providing benchmarks for the industry to understand how different makes and models hold their charge over time.

FAQs About Fleet Service GB

What services does Fleet Service GB offer?

We provide a total fleet management solution, including maintenance management, accident management, and driver safety programmes. You can see our full range of services on our Fleet Management page.

Can you help with my company’s transition to electric vehicles?

Absolutely. We offer data-driven insights and consultancy to help you choose the right vehicles and manage the infrastructure needed for a successful EV transition.

Is your maintenance network suitable for EVs?

Yes! Our network includes specialist EV-ready garages with qualified technicians capable of handling everything from routine servicing to complex battery diagnostics.

Conclusion

The latest data from the Generational 2025 Battery Performance Index is a massive confidence booster for the UK fleet industry. With used EV battery degradation proving to be much lower than expected, the argument for switching to electric has never been stronger.

At Fleet Service GB, we are here to ensure your transition is smooth, your drivers are supported, and your vehicles stay on the road.

Ready to supercharge your fleet’s efficiency? Explore our Fleet Management services or learn how we support your team through our Driver Management programmes today.