EV · 5 min read
Can solar panels charge an electric car?
Yes — and for many EV owners it's the upgrade that finally makes solar add up. The practical question is when you actually charge, and whether you want to lean on solar, an off-peak tariff, or both.
Key things to consider
Daytime charging
If your car is at home during the day, a solar diverter or smart charger can route surplus generation straight into the battery — effectively free miles.
Battery storage
A home battery captures midday solar to use later for evening charging, particularly useful for commuters.
Smart tariffs
Tariffs like Intelligent Octopus drop EV charging cost to around 7p/kWh overnight, often beating solar in winter when generation is low.
Pros
- Drastically reduces running costs of an EV
- Solar + smart tariff covers most of the year cheaply
- Compatible smart chargers automate the whole process
- Improves return on both the solar and the car
Cons
- Pure solar charging is limited on dark winter days
- Compatible charger and inverter combinations matter
- Older EVs may not support smart-tariff scheduling
- Maximises savings only if you can charge during the day or overnight
What it actually costs
Charger cost
A 7kW smart charger installed costs £800–£1,200. Many integrate directly with solar via apps like myenergi or Tesla.
FAQs
Do I need a special charger to use solar?
A solar-aware charger or diverter helps you use surplus generation rather than exporting it cheaply. Standard chargers work too but won't optimise.
Can I charge faster with solar?
No — solar tops up at the rate the panels are generating. Full-rate charging still draws from the grid or battery.
Is it cheaper than public charging?
Substantially. Public rapid chargers can cost 70p+/kWh; home solar or off-peak charging often lands under 10p/kWh.
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