What factors influence the potential technical performance of my solar power system?

Roof orientation

Under optimal conditions the modules should be oriented toward the south. If this is not possible, then the following rule of thumb applies: The closer to south, the better the chances for optimal capture of energy. Hence, the stronger the tilt of the module, the stronger the effect of the orientation for the ultimate energy generation.

Roof pitch

The energy output from a PV system is statistically at its highest when the sunlight hits the solar cells at a right angle. The optimal tilt for fixed PV modules in Germany is 28 – 30 degrees. In general PV systems should be tilted between 20 – 60 degrees. The tilt angle can be adjusted using elevation systems.

Shading

Architectural and topographic factors that lead to shadows falling on the solar module reduce the energy generation and should be avoided.