Type your address and we pull real satellite solar irradiance data for your exact coordinates — including local electricity prices and CO₂ factors.
Enter your address and EV — we'll estimate the panels, yearly savings, payback time, and the best hours to charge from your own roof.
Charge Planner analyzes live solar data and real-time electricity prices to show you exactly when plugging in is cheapest and greenest — updated every morning.
Check Today’s Charging WindowType your address and we pull real satellite solar irradiance data for your exact coordinates — including local electricity prices and CO₂ factors.
Choose your brand and model. We use your vehicle's real consumption profile to calculate exactly how many panels you need to cover your annual driving.
Every metric updates instantly: annual savings, CO₂ offset, full charges per year, and payback period — all personalized to your roof, vehicle, and country.
FAQ
It depends on your EV's battery size, how much you drive annually, and your location's solar irradiance. Most EV drivers in Central Europe need 6–14 panels (400W each) to cover their annual charging needs. VoltSun calculates this precisely using your actual EV model and real PVGIS satellite data for your address.
The typical payback period in Europe is 7–12 years, depending on your electricity price, system size, and local solar conditions. EV drivers often see faster payback because they replace expensive grid electricity with free solar energy. VoltSun shows your exact ROI estimate in the calculator results.
Yes, in many cases. A well-sized system can generate enough electricity annually to cover 100% of your driving. In practice, you'll export excess solar energy in summer and draw from the grid in winter — but over the year it balances out. Adding home battery storage increases self-sufficiency further.
PVGIS (Photovoltaic Geographical Information System) is a scientific database maintained by the European Commission's Joint Research Centre. It contains decades of satellite-measured solar irradiance data for every location in Europe and beyond. VoltSun uses PVGIS so your estimates are based on real historical data, not generic averages.
No — you don't need a battery to benefit from solar charging. If you're home during the day, your EV can charge directly from solar panels. A battery helps if you charge at night or want to store excess daytime production. VoltSun's estimates assume direct solar charging without requiring battery storage.
Very accurate for planning purposes. We use real PVGIS irradiance data for your exact GPS coordinates, your EV's actual consumption profile, and local electricity prices. Real-world results may vary ±10–15% depending on your roof's pitch, shading, and panel orientation — factors you can discuss with a local installer.
VoltSun currently supports 45+ EV models across 21 brands, including Tesla, BMW, Audi, Volkswagen, Hyundai, Kia, Mercedes, Renault, Nissan, BYD, and more. We update the database regularly. If your model is missing, contact us and we'll add it.
Yes, completely free. No account required, no hidden fees. VoltSun is a free tool for EV drivers and homeowners in Europe who want to understand how solar panels can reduce their charging costs.
Contact
Whether it's about your solar setup, a feature request, or a partnership — we're here.
hello@voltsun.app