Solar Power Calculator | House & Garden Tools

More Tools

With our solar yield calculator, you can easily estimate how much energy you could generate with a photovoltaic system on your roof. Enter your roof area, orientation, tilt angle, and location – we’ll calculate your expected yield.

Learn more in the matching guide:

How much electricity can a solar panel system produce?

Thinking about installing solar panels? This guide explains how to estimate your potential energy output using roof size, orientation and tilt angle.

Good to know: South-facing roofs with a tilt of about 30° provide the highest annual yields. Slight deviations like southeast or southwest still achieve excellent results.

FAQ

How is solar yield calculated?

The calculation is based on your location’s solar radiation data, available roof area, panel efficiency, and roof orientation and tilt.

Why does roof orientation matter?

The more directly sunlight hits the panels, the more electricity they produce. South-facing roofs are ideal.

How does the tilt angle affect yield?

A tilt of around 30–35° is optimal for year-round solar production. Flatter or steeper roofs have slightly lower efficiency.

What is panel performance per square meter?

Modern solar panels typically deliver 150–220 Wp per square meter. High-efficiency panels can exceed 220 Wp/m².

How accurate are the calculations?

Our estimates are based on climate data and simplified models. Local weather variations can influence actual yields.

How much electricity can a solar panel system produce?

FAQ

Additional Tools