*2.3. PV Potential Profiles*

To determine the production profiles of the PV potentials, we use irradiation and temperature data from 2014 of the Austrian Central Institute for Meteorology and Geodynamics (ZAMG) [14] in combination with the area of suitable roofs we gained from the Styrian solar roof register from the regional government of Styria [15]. The Styrian solar roof register contains all roof areas that are suitable for the generation of solar energy and exceed a size of 20 m2. Based on Airborne laser scanning (ALS) the suitable roof areas were identified and divided into "good" and "very good" areas as shown in Figure 3. The division into "good" and "very good" suitable roof areas is carried out during the data collection of the solar roof register and takes into account the size, azimuth, tilt and shading of the roof areas [31]. For each suitable roof area, detailed information such as the area in m2 and the potential annual production in kWh is available in addition to the geographical location.

**Figure 3.** Example of suitable roof areas, including the classification "very good" and "good" based on data from the solar roof register [15].
