How it works

Plan a photovoltaic system and explore its yield in seconds

This simulation is for orientation only and does not replace professional advice.

Location

Roof

Roof type

Pitched roof Flat roof Solar fence

Roof position & azimuth

PV system

Advanced settings

System losses 14%

Inverter, cables, soiling, temperature mismatch — typically 12–16%.

Shading 0%

A flat-rate reduction for partial shade.

Inverter cap

Data source

PVGIS (precise) Hourly typical-year data from the EU Joint Research Centre. Quick estimate Climatological model, no external data.

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

Sample Clear sky

Total: —

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

Solar-Wissen

Ertrag verstehen, Annahmen prüfen

PVGIS-Methodik Datenquellen und Rechenweg vom Sonnenstand bis zur kWh. Beispiel Einfamilienhaus Eine realistische 10-kWp-Beispielrechnung einordnen. Dachneigung & Ausrichtung Azimut, Süd- und Ost-West-Dächer verständlich erklärt. Grenzen des Rechners Verschattung, Wetterjahre und lokale Technik richtig bewerten.