Compare installed capacity of PV systems with system size of the unit

[FlorianK13]

To verify the installed capacity of PV systems, a comparison to other quantities that refer to system size is often useful. The installed power should scale with:

• Number of modules
• Power of the inverter
• Area of the pv system (only available for ground mounted PV systems)

In this paper, we did exactly this comparison to flag entries in the MaStR that have incorrect attributes.