Is solar worth it for charging an electric car?

As the UK moves toward the 2035 ban on new petrol and diesel cars, the question for many British homeowners has shifted from “Should I get an EV?” to “How on earth do I power it affordably?”

With electricity prices remaining volatile, the synergy between Solar Photovoltaic (PV) panels and Electric Vehicles (EVs) has become the holy grail of home energy. But is it actually worth the investment? Let’s look at the numbers, the tech, and the reality of solar-powered driving in the UK.

The big question: Can solar panels actually charge an EV?

The short answer is: Yes, but with a catch. A typical UK solar array (roughly 4kWp to 6kWp) generates enough power to cover a significant portion of an EV’s daily mileage. However, because most people work during the day when the sun is out, the when of your charging matters just as much as the how.

Why Solar is the essential partner for your EV

1. Driving on free sunshine

The average UK driver covers about 20 miles a day. A standard solar setup can easily generate enough electricity to cover this distance for free during the spring, summer, and autumn months. By bypassing the National Grid, you are essentially “pre-paying” for your fuel for the next 25 years at a fixed, low cost.

2. Protecting against price hikes

When you rely solely on the grid to charge your car, your costs are tied to fluctuating energy markets. Solar panels act as a hedge against inflation. Once the system is paid for, your cost per mile drops to near zero.

3. Reducing your total carbon footprint

An EV is only as “green” as the electricity used to charge it. By using home-grown renewable energy, you ensure your motoring is truly zero-emission from start to finish.

Key tech: The solar-ev ecosystem

To make solar work for your car, you need more than just panels. To get the best return on investment (ROI), consider these three components:

• Zappi/Smart EV chargers: Standard chargers take power from the grid. Smart solar-aware chargers (like the Myenergi Zappi) can detect when your home is exporting excess solar energy and divert it into your car instead of letting it spill back into the grid.
• Battery storage: A home battery (like a Tesla Powerwall or GivEnergy system) allows you to store the sun’s energy during the day and discharge it into your car overnight.
• Solar-friendly tariffs: Combine your panels with an “intelligent” EV tariff (like those from Octopus Energy). This allows you to sell excess energy back to the grid at high rates via the Smart Export Guarantee (SEG) while charging your car for less at night.

The ROI: Is it worth it in 2026?

According to recent data, combining solar with an EV can reduce your annual motoring costs by over £1,000 compared to grid-only charging, and by over £2,500 compared to a petrol vehicle.

While the upfront cost for a solar and battery system can range from £8,000 to £12,000, the payback period is significantly shortened when you factor in the fuel savings from an EV.

How to get started

Installing solar panels and EV chargers requires specialist knowledge. Under UK law, EV chargers must be installed by a competent person, and Solar PV systems should be installed by MCS-certified professionals to ensure you can claim the Smart Export Guarantee.

Ready to switch to solar? Whether you need an EV charger pro or a solar specialist, we’ve got over 50,000 vetted tradespeople ready to help. Find a local solar expert on Rated People today.