A large number of companies have invested in PV installation in recent years. Guiding principles were not only energy consumption and available roof area, but often also the subsidies in place at the time.
In the process, the relatively high cost of the systems meant that the panels were often aligned in rows facing south, leaving much valuable space unused. Solar panels are now mainstream, and this translates into the fact that the price of solar panels has fallen sharply over the past year.
Combining solar with a battery suddenly opens up new possibilities where it is often more interesting to use the roof area as optimally as possible via an east-west arrangement.