0:36 How the system works
1:12 Arranging a survey
1:24 How long do they take to instal?
1:42 The installation process
2:55 Can the panels damage the roof?
3:14 The currents
3:40 Generation meter
3:45 When do they start working?
With the cost of solar panels coming down, you might be thinking of installing some at your home. Watch our video to find out how solar photovoltaic panels work and see how the panels are installed on a concrete tiled roof. For more information about solar panels, and a checklist of what to look out for if you’re considering getting solar PV, visit To find a trusted trader in your area, join Which? Local at