How Our Calculator Works

Understand how we calculate your solar potential.
With real data and zero guesswork.

Smart Data. Real Results.

We use your roof's angle, orientation, and address - combined with your electricity usage - to calculate your solar potential. The system pulls live data from PVGIS (EU solar radiation), DMI (weather), DAWA (building info), and NordPool (market prices) to estimate output, sizing, and expected savings.

Simple. Clear. Personalised.

Your report is tailored to your home and usage. It explains the expected production, system size, payback period, and return on investment - all in plain language. You get a clear, easy-to-understand snapshot of what solar can do for your home.

Learn More About Our Data Sources

Frequently Asked Questions

We've answered the most common questions about our calculator, your roof, and what to expect.

Explore popular questions:

Can you provide a detailed report based on my address and weather data?How much can I save with solar panels and a battery in Denmark?Can I charge my electric car using solar panels?Are solar panels a worthwhile investment in 2025?What sets EcoRay apart from other advisors?

Could Your Solar Pay for Itself?

Try the calculator and discover your estimated savings - it only takes 2 minutes.
100+
Reports generated in Denmark
98%
Users found results easy to understand
4
Data sources (PVGIS, DMI, DAWA, NordPool)
2 min
To get your personalised estimate
0 kr.
Free to try, no commitment
100%
Data transparency & source traceability