Solar panels with EV charging — combined ROI
Pairing solar with an EV is the highest-return home energy combination in the UK in 2026. Daytime solar charges the EV directly; the battery shifts overnight off-peak electricity to evenings; the export tariff sells your surplus back. The calculator below prices it as a single system.
Frequently asked questions
Is solar worth it if I have an EV?
Especially yes — an EV typically uses 2,500–3,500kWh/year, all of which can come from solar in summer. The marginal kWh saved is worth more because you'd otherwise pay public-charging or peak tariff rates.
Should I get a battery if I have solar + EV?
Almost always. Without a battery your solar export crashes in winter when your EV needs daytime charging most. A battery captures cheap overnight rates for the EV in winter and stores summer surplus for the home.
How much can I save per year?
A typical UK 4-bed with 4kWp solar, 10kWh battery and one EV on Octopus Go saves £1,800–£2,600/year vs no solar/battery on a standard tariff.