Electricity from solar power: How does it work? Our accredited installers have been trained in Solairedirect installation methods and are QualiPV-certified. They will perform the installation process in a few days (usually in 3 days).The quality of the installation is strictly monitored by an outside agency. There are two types of installation procedures for solar arrays:• Retrofitted: The solar panels are fitted onto the existing roof. • Building-integrated PV: In this case, the panels have an architectural function in the building structure or as part of the roof’s waterproofing (e.g replacement of some or all roof tiles with solar panels). The choice of installation method will affect the feed-in tariff of the electricity produced. ![]() |