Charging an Electric Car with Solar Panels: What You Need to Know (2026)
Yes, you can charge an electric car with solar panels - and for many households, it's the most cost-effective way to run an EV. A 4kW solar system generates around 3,400 kWh per year in Hampshire. A typical electric car needs around 2,000-2,500 kWh per year to cover 7,500 miles. The numbers work.
The question isn't whether it's possible but how to set it up so you capture as much solar-generated electricity as possible for charging, rather than exporting it to the grid.
How Solar EV Charging Works
Your solar panels generate DC electricity, which your inverter converts to AC for use in your home and car. A solar-aware EV charger sits between the two and monitors what your panels are producing in real time. When generation exceeds household demand, the charger diverts that surplus to your car rather than letting it export to the grid.
Without a solar-aware charger, your EV draws from the grid at the standard rate (24.5p/kWh at current Ofgem prices) regardless of what your panels are doing. A solar-aware charger like the myenergi zappi can reduce or eliminate that grid draw during daylight hours.
Add a battery and the picture improves further. Solar generated during the middle of the day charges the battery; you draw from the battery in the evening when you plug the car in after work. A 10kWh battery stores roughly 30-40 miles of driving range - enough to top up most daily mileage from solar alone.
What You Need
Solar panels. A 4kW system (10 panels, around 20m² of roof space) suits most households combining home use and EV charging. If you drive more than 10,000 miles per year or have a larger EV, a 6kW system gives you more headroom.View our solar installation service.
A solar-aware EV charger. The myenergi zappi is the most widely fitted option in the UK. It has three modes: fast (charges from the grid at full speed), eco (blends solar and grid), and eco+ (only charges when your panels produce more than your home needs). In eco+ mode, charging is slower - typically 1.4kW minimum - but you're using electricity that would otherwise export at 4-25p/kWh instead of importing at 24.5p/kWh.
The SolarEdge EV Charger Inverter combines the inverter and EV charger in one unit and can charge at up to 9.6kW by combining solar output with a controlled grid draw. It suits households that need faster charging and want a single integrated system.
Battery storage (optional but useful). Charging your EV from a battery means solar generated at noon can charge your car at 7pm. A 10kWh battery covers most daily driving if you're mostly charging at home.View our battery storage service.
The Financial Case
Charging from solar-generated electricity effectively costs you nothing - or more precisely, it costs you the export income you'd have earned instead. The best SEG fixed rates in 2026 are 25p/kWh (Good Energy) and 24p/kWh (EDF). Importing electricity to charge your EV costs 24.5p/kWh. So the saving from solar self-consumption for EV charging is roughly 0-0.5p/kWh versus the best export tariffs - but if you're on a lower SEG rate (some pay 4-6p/kWh), the saving is around 18-20p per kWh diverted to charging rather than exported.
Over 7,500 miles and 2,200 kWh of EV charging per year, that's potentially £400-£440 saved on fuel costs compared to importing from the grid, on top of the savings on household electricity.
If you're on a time-of-use tariff like Intelligent Octopus Go (cheap overnight rates around 7-8p/kWh), a different strategy often makes more sense: export everything at peak SEG rates during the day and charge your EV overnight at cheap grid rates. The right approach depends on your tariff, driving pattern, and battery size.
Charging Times in Practice
| Scenario | Charge rate | Range added per hour |
| Eco+ mode (solar surplus only) | 1.4-3.5kW | 5-14 miles |
| Eco mode (solar + grid blend) | 3.5-7kW | 14-28 miles |
| Fast mode (standard home charger) | 7kW | 28 miles |
| SolarEdge integrated (solar + grid) | up to 9.6kW | up to 38 miles |
In winter, solar output drops to 30-40% of summer levels. You'll rely more on grid imports or overnight tariffs between November and February. The annual average still comes out well if your system is sized correctly.
System Size Guide
| Annual mileage | EV energy need | Recommended solar | Battery useful? |
| Under 5,000 miles | ~1,400 kWh | 3-4kW | Optional |
| 5,000-10,000 miles | 1,400-2,800 kWh | 4-6kW | Yes |
| Over 10,000 miles | 2,800kWh+ | 6kW+ | Yes |
FAQ
Can I charge my EV entirely from solar? Over a full year in Hampshire, a 4kW system generates enough electricity to cover around 7,500-8,500 miles of EV charging - roughly the UK average annual mileage. You won't capture all of it as solar self-consumption (some will export when you're not charging), but a combination of daytime solar charging and a battery can cover most of your annual driving from your own generation.
Do I need a special charger or will any home charger work? Any home charger will charge your EV from solar if the panels are producing and you're drawing power. But without a solar-aware charger, the car takes what it needs from the combined supply without prioritising solar. You can end up importing from the grid unnecessarily. A zappi or similar solar-aware charger prevents this.
What happens when the sun isn't shining? Your charger draws from the grid, at whatever rate your tariff charges. If you have a battery, it draws from the battery first. Most people treat grid top-ups in winter as a normal part of the setup rather than a problem to eliminate entirely.
Will solar and an EV charger overload my electrics? Your installer checks your consumer unit during the survey. Older properties with a small consumer unit or ageing wiring sometimes need an upgrade before adding a 7kW EV charger alongside solar. This is less common in homes built after 2000. Budget £500-£1,000 if an upgrade is needed.
Is there any government support for EV chargers? The OZEV grant (£350 toward a home EV charger) ended for most homeowners in 2024, though it remains available for flat and rental property owners. 0% VAT applies to solar installations until March 2027. The Warm Homes Plan may fund solar for eligible households -check your eligibility here.
CRG Direct installs solar, battery storage, and EV charging across Hampshire. MCS Certified, HIES Accredited.
Contact us for a free site survey and quote. We'll respond within one working day.