Charge Your EV for Free Using Your Own Solar Panels, Is It Really Possible?
If you own an electric vehicle or you’re thinking about making the switch one of the first questions people ask is: how much will it actually cost to charge?
Public chargers can be expensive, and even home charging adds to your electricity bill. But what if you could charge your car using energy you generated yourself, for free?
It sounds too good to be true. Here’s the reality and why more Birmingham homeowners are making it happen right now.
First: How Does Charging an EV From Solar Work?
Solar panels generate electricity from daylight and that electricity can power anything in your home, including your car charger.
When your solar panels are producing more electricity than your home is currently using — which often happens on sunny spring and summer days — that surplus energy can be used to charge your EV rather than being exported to the grid for very little financial return.
The result: your car charges using electricity that would otherwise go to waste, at effectively zero cost to you.
What Do You Actually Need?
To charge your EV from solar, you need three things working together:
- Solar PV panels installed on your roof
- A home EV charger (ideally a smart charger)
- Ideally, a battery storage system — though this isn’t essential
A smart EV charger allows you to schedule charging around solar generation so your car charges during the hours your panels are most productive, rather than in the evening when the grid is more expensive.
Adding battery storage takes this further. Any solar energy you generate but don’t immediately use gets stored in the battery, ready to charge your car later in the day, or to power your home overnight. It’s the most efficient setup and it means you’re far less reliant on the grid at all.
How Much Could You Actually Save?
The numbers are genuinely compelling. The average EV driver covers around 7,000–10,000 miles per year. At typical grid electricity rates, that might cost £500–£700 annually to charge at home.
With solar panels generating a meaningful portion of that electricity especially in spring and summer, many homeowners cut that figure significantly. Those with battery storage report covering the majority of their EV charging costs through solar, particularly in the warmer months.
Your exact savings depend on:
- The size of your solar system
- How many miles you drive
- Whether you have battery storage
- Your energy tariff
Here at Gallagher Electrical we are approved Octopus Energy partners — so we can help you understand how to get the most from smart tariffs alongside your solar and EV setup.
Is It Worth Doing Both at the Same Time?
Yes!
If you’re already planning to get solar panels, adding an EV charger at the same time makes sense. The wiring, survey, and installation work overlaps, which reduces cost and disruption. Similarly, if you’re buying an EV, it’s a natural moment to look at solar especially as energy prices remain high.
The two technologies genuinely complement each other. Solar generates energy; the EV stores it (in the car battery) and uses it. Add a home battery and you’ve got a complete home energy system that makes you much more self-sufficient.
What About When It’s Cloudy?
This is the most common question and it’s a fair one. Solar panels do still generate electricity on cloudy days, just at a reduced level. In the UK, a well-sized solar system will typically cover a good portion of your annual energy needs even with our unpredictable weather.
For EV charging specifically, the strategy is to use solar when it’s available and fall back to grid electricity (ideally at off-peak rates overnight) when it’s not. With a smart charger and the right energy tariff, your car is always charged and you’re always using the cheapest energy available.
Why Gallagher Electrical?
Most EV installers only do EV chargers. Most solar companies only do solar. Here at Gallagher Electrical we do both.
That means when we design your system, we’re thinking about how everything works together: the solar generation, the battery storage, the charger, and your energy tariff. You get a joined-up installation from one trusted team, rather than two separate companies who’ve never spoken to each other.
We’re NICEIC approved, MCS certified, and serve both homeowners and businesses across Birmingham and the West Midlands.
Ready to Find Out What’s Possible for Your Home?
Every home and every situation is different. The best way to find out how much you could save is to have one of our team visit your property and give you a proper assessment.
Book a free site survey today we’ll look at your roof, your energy usage, and your driving habits, and give you honest advice on what combination of solar, battery, and EV charging makes sense for you.