Solar Panel Calculator for Spain
Spain has some of Europe's best sun and rising electricity prices, making rooftop solar very attractive. This free solar calculator estimates your system size, payback and savings in euros using local rates and sun hours.
Calculate my solar payback in Spain →
Solar at a glance in Spain
With strong irradiance and high daytime self-consumption, payback in much of Spain is often in the mid-single-digit years.
| Currency | euros (EUR) |
|---|---|
| Typical electricity rate | € 0 per kWh |
| Installed cost | ≈ € 2 per watt |
| Peak sun hours | ≈ 4.7 hours/day |
| Export / buyback | ≈ € 0 per kWh |
Indicative 2026 starting points — every figure is editable in the calculator, and results depend on your own bill, roof and installer quotes.
A typical 5 kW system in Spain
At around € 2 per watt, a 5 kW rooftop system costs roughly € 8,000 and produces about 6,690 kWh in its first year at Spain's 4.7 peak sun hours a day. Your real numbers depend on your roof, shading, panel choice and how much power you use during the day — run your own figures in the calculator to see your exact payback, net savings and ROI.
How the solar calculator works
- Your setup. Spain and euros are pre-selected, with local electricity rate, install cost and sun hours filled in. Enter your monthly bill, or size the system from your appliances.
- Your roof. Search your address or tap “use my location”, then draw your roof on the satellite map — or just type its area. We check the system fits and read local sun hours from NASA data.
- Your results. Instantly see your payback period, net savings, ROI, system size, year-1 production and lifetime CO₂ offset — compare cash vs. a loan, and download a PDF report.
Common questions — solar in Spain
How many solar panels do I need in Spain?
It depends on your electricity use, roof space and local sun hours (about 4.7 peak sun hours/day here). A 5 kW system of high-wattage panels is a common starting point for a home — enter your bill or appliances and the calculator gives your exact panel count and system size.
Does Spain have net metering?
Spain uses simplified compensation for surplus (compensación de excedentes) rather than full net metering — exported energy is discounted from your bill at an agreed rate, though it can't take the bill below your fixed charges. The calculator models this as buyback.
Are there solar subsidies or incentives in Spain?
Regional grants and municipal IBI property-tax rebates plus income-tax deductions are common, though availability varies by region and over time. Enter any incentive you qualify for.
How much does a solar system cost in Spain?
A typical 5 kW system is around € 8,000 at about € 2 per watt installed before any regional grant. The calculator prices your own size.
Work out your system size
Not sure how big a system you need? These guides work back from your monthly usage:
500 kWh/month 1,000 kWh/month 1,500 kWh/month 2,000 kWh/month 2,500 kWh/month 3,000 kWh/month
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