How it works
Plan a photovoltaic system and explore its yield in seconds
Your roof. Your choice.
Estimate your solar yield without choosing a brand. This calculator does not recommend specific manufacturers or products.
How the calculation worksThis simulation is for orientation only and does not replace professional advice.
Location
Roof
Roof type
Roof position & azimuth
Loads aerial images from Esri (USA) to align the compass with your roof; your IP address is transmitted. You can withdraw this consent at any time, with effect for the future, by hiding the image again. Privacy policy
PV system
Advanced settings
Inverter, cables, soiling, temperature mismatch — typically 12–16%.
A flat-rate reduction for partial shade.
Annual yield
—
kWh / year
Specific yield
—
kWh / kWp / year
≈ households powered
—
× 4-person household
Winter
— kWh
— · Nov – Feb
Shoulder
— kWh
— · Mar – May, Sep – Oct
Summer
— kWh
— · Jun – Aug
% of optimal
—%
vs. South-facing, 30°
Monthly distribution
kWh per month
Hourly shape · sample day
Missing something? Something look wrong? Tell us. We read every message. Send feedback
How it works
From sun position to kWh
For each of 8,760 hours of a typical meteorological year, we transpose horizontal irradiance onto your tilted roof using sun position, decompose direct and diffuse light, then derate for module temperature and your declared system losses.
Frequently Asked Questions
What does brand-neutral mean here?
The yield model uses your location, weather data and technical inputs such as capacity, orientation and losses — not a manufacturer or product selection. It estimates yield; it does not rank products or recommend a purchase. Any advertisements shown are not product recommendations from the calculator. The estimate is for orientation and does not replace site-specific planning.
Solar-Wissen