Solar EV Charging Costs UK – Can You Charge Your Car for Free?

With rising fuel prices and uncertainty around electric vehicle (EV) running costs, more UK homeowners are asking a simple question: can you charge your electric car for free using solar panels?

The answer is yes — but only with the right setup. In this guide, we break down the real cost of charging an electric car in the UK, how solar panels change the equation, and where home battery storage fits in.

If you're new to solar pricing, start with: solar panel costs in the UK.

Cost of Charging an Electric Car in the UK

Charging costs vary depending on how and when you charge your EV:

• Home charging (standard tariff): £0.25–£0.35 per kWh
• Off-peak tariffs: £0.07–£0.15 per kWh
• Public rapid chargers: £0.60–£0.85 per kWh

For a typical EV with a 60kWh battery, this means:

• Home charging: £12–£20
• Off-peak charging: £5–£9
• Public charging: £35–£50+

👉 For a full breakdown, see our EV charging cost comparison guide.

Can Solar Panels Power Your Electric Car?

Yes — solar panels can generate electricity to charge your EV, especially during daylight hours. A typical UK solar system (3–5kW) can produce enough energy to cover a significant portion of your driving needs.

Homes with higher electricity demand — including EV charging — often benefit from larger solar systems and battery integration.

However, solar generation is highest during the day, while most EV charging happens in the evening — which is where battery storage becomes important.

👉 Learn how this works in detail: charging an EV with solar panels explained.

Why Battery Storage Changes Everything

Without a battery, excess solar energy is often exported to the grid. With a battery system, you can store that energy and use it later — including for overnight EV charging.

This allows homeowners to:

• Charge their car using stored solar energy
• Reduce reliance on expensive peak electricity
• Maximise savings from their solar system

👉 Explore how this works in practice: home battery storage systems and installation options.

Is Charging an EV with Solar Really Free?

While solar energy itself is free once installed, the system cost must be considered. Most UK homeowners see:

• Reduced EV charging costs within months
• Full system payback over several years
• Long-term savings compared to petrol and diesel

The key benefit isn’t just “free charging” — it’s energy independence and predictable costs.

Solar vs Petrol vs Electric – Cost Per Mile

Here’s how typical UK running costs compare:

• Petrol: 15–20p per mile
• Diesel: 12–18p per mile
• Electric (grid): 6–10p per mile
• Electric (solar): 1–4p per mile

👉 Read the full comparison: Is an electric car worth it in the UK?

Best Setup for Solar EV Charging

For maximum savings and flexibility, most homeowners choose:

• Solar panel system
• Home battery storage
• Smart EV charger

This combination allows you to generate, store and use your own electricity — reducing reliance on the grid.

👉 Compare system costs: best solar + battery setup for EV charging

Compare Your Options

If you’re considering solar panels or battery storage to reduce EV charging costs, it’s worth comparing real UK pricing and system options.