This is something that the installer or an advisor should assist the customer with. They will be able to calculate the required capacity of an installation based on electricity bills from recent years and an analysis of the technical parameters of the roof to help their customer choose the appropriate type and number of modules.

The home’s power requirements are an important consideration. The installer, along with the investor, must also consider whether major investments are planned in the coming years. Installing air conditioning, a heated driveway, or an electric car charger will all significantly increase power requirements. It is worth it to include these plans in the design.