Running an electric car is already cheaper than running a petrol one, but pair it with solar panels and the sums get better still. Instead of buying electricity to charge your car, you can top it up with power generated on your own roof, turning sunshine into miles for next to nothing.
This guide explains how solar and EV charging work together in 2026, how to charge from your own generation or cheap off-peak power, and what it costs to set up. It is written by Cre8 Zero, an MCS-certified solar, battery and EV charging installer based in Brighton and serving drivers across Sussex, Kent, Surrey, Hampshire and Brighton & Hove.
How solar-diverted charging works
The clever part of a solar and EV setup is what happens with your surplus. On a sunny day, your panels often generate more than the house is using, and rather than exporting that surplus for a modest payment, you can send it to your car.
A compatible smart charger detects when you have spare solar and diverts it to the vehicle automatically. Many chargers let you choose a mode: charge only from surplus solar, blend solar with grid power, or charge at full speed regardless. It means your car quietly fills up on free daytime generation whenever the sun is out.
Key takeaway: solar-diverted charging sends your spare generation to your car instead of the grid, so you drive on power you would otherwise have sold cheaply.
Matching charging to generation and cheap tariffs
Getting the best from the pairing is about timing, and there are two levers.
The first is daytime charging. If your car is home during the day, or at weekends, solar-diverted charging is close to free motoring. This suits home workers, retirees and anyone who can plug in during daylight.
The second is off-peak tariffs. Many EV drivers use time-of-use tariffs with cheap overnight rates, often in the region of 7p per unit, far below the daytime price. Charging overnight on a low rate, then using solar during the day for the house, is a powerful combination. Do both and you rarely pay a high rate for anything.
Where a battery fits in
Not everyone can charge during daylight, and that is where a home battery bridges the gap. It stores your daytime solar so you can use it in the evening, including to charge the car after work.
A battery can also be charged from cheap off-peak grid power and then used to top up the vehicle or run the house at peak times. For households out during the day, a battery is often what unlocks solar charging in practice, capturing generation you would otherwise miss. Whether one pays depends on your habits, which we are always happy to model.
Thinking about solar, a battery and a charger together? Book a free energy assessment and we will design the right combination for your home.
What does an EV charger cost to install?
A home EV charger is a modest investment next to the car itself. Treat these as indicative 2026 figures, since the final price depends on your charger choice and the installation.
- Typical home charger (7kW): roughly £800 to £1,200 supplied and installed
- Premium smart chargers: a little more, for advanced solar-matching and app features
- Trickier installs: longer cable runs or consumer unit upgrades can add to the cost
Most homes use a 7kW charger, which comfortably replenishes a typical car overnight or across a sunny day. Some households, such as flat owners and renters, may still be able to access a government EV chargepoint grant, so it is worth checking the current schemes for your situation.
Smart chargers and monitoring
Modern EV chargers are genuinely smart, and that intelligence is where the savings live. A good charger connects to an app so you can control and monitor charging from your phone.
Useful features to look for include:
- Solar matching, to charge only from surplus solar or blend it with grid power
- Scheduling, to target cheap off-peak windows automatically
- Monitoring, to see how much of your charging came from solar versus the grid
- Load balancing, to protect your home supply from overload while charging
Together these mean your car charges at the cheapest possible moments without you thinking about it, and you can see exactly where your energy is coming from.
Benefits for home and small business fleets
Solar charging is not only for households. Small businesses with vans, pool cars or director vehicles can benefit just as much, and often more.
A business charging an electric van or two from a rooftop solar system turns a rising fuel cost into one it largely generates itself. For sites with daytime operations, vehicles can charge from solar while parked, and larger premises can add multiple charge points. It is a practical way to cut fleet running costs and support sustainability goals at the same time.
Key takeaway: whether you run one family car or a handful of vans, charging from your own solar turns fuel into a cost you control.
What could you actually save on fuel?
It helps to see the difference in real terms. A typical electric car uses roughly 2,500 to 3,500 units of electricity a year to cover around 7,000 to 10,000 miles, and how you charge those units decides the cost.
Charge on a high daytime grid rate and you pay full price. Charge overnight on an off-peak tariff, often around 7p per unit, and the same mileage costs a fraction of that. Charge from your own solar during the day and those units are effectively free, offset only against the modest export payment you would have received. These are indicative figures, but the pattern is clear: the more you shift charging to solar and off-peak windows, the closer your motoring cost falls towards zero.
Key takeaway: the electricity is the cheap part of driving electric, and solar plus off-peak charging makes it cheaper still.
One integrated system, one installer
The real magic happens when solar, battery and EV charging are designed to work as a single system rather than three separate purchases. That is exactly what we do.
When one team designs your generation, storage and charging together, everything talks to everything else, prioritising solar, managing your tariff and balancing your home supply intelligently. Every Cre8 Zero installation is MCS-certified and carried out by fully qualified electricians, backed by an insurance-backed workmanship warranty and our 5-star ratings on Trustpilot and Google. You can read more about the wider benefits of EV chargers or talk to us directly through our contact page.
Frequently asked questions
Can I charge my electric car with solar panels? Yes. With a compatible smart charger, surplus solar generated by your panels can be diverted to your car automatically. On a sunny day this lets you charge from power you would otherwise export, making daytime charging close to free.
How does solar EV charging work? A smart charger detects when your panels are generating more than the house is using and sends that surplus to the car. Many chargers let you choose to charge only from solar, blend solar with grid power, or charge at full speed, so you can prioritise free generation.
Do I need a battery to charge my car with solar? No, but a battery helps if your car is not home during daylight. It stores daytime solar so you can charge in the evening, and it can hold cheap off-peak power too. For households out during the day, a battery often makes solar charging practical.
How much does a home EV charger cost in 2026? A typical 7kW home charger costs roughly £800 to £1,200 supplied and installed, with premium smart chargers a little more. Trickier installations can add to the cost. Some flat owners and renters may still access a government EV chargepoint grant, so check current schemes.
Is it cheaper to charge an EV with solar or off-peak electricity? Both are far cheaper than daytime grid rates. Solar-diverted charging uses your own generation, effectively free, while off-peak tariffs offer very low overnight rates, often around 7p per unit. Many drivers combine the two, charging on solar by day and off-peak by night.
Drive on sunshine
An EV charger and solar panels are a natural pairing, and together they can cut your motoring costs to a fraction of what fuel once cost you. Designed as one system, they make the most of every ray your roof collects.
Let our MCS-certified team put solar, storage and charging together for your home or business. Book a free energy assessment, call us on (020) 3038 4595, or email enquiries@cre8zero.com.
