Calculate your roof price by entering only the total square meter of the roof and the desired output in Watt.
Production in Watt should roughly correspond to 50-70% of total kW / t consumption per year. Example: If you use 10,000 kW / t of power per. year, you should dimension the output to 5000-7000 watts (5-7 kW solar cells) at the low end if you have electric heated houses, as you have more consumption outside the sun’s production during the year. Higher for other hot installation, or by electric car and or battery connection connected.
1000W provides approximately 800-950 kW / t per year, depending on the direction and the slope.
Taken complete without assembly will usually be paid by solar cells production between 18-22 years, the solar cells isolated will be paid after 4.7-10.5 years. Depending on country, electricity price etc.
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