The best angle for solar panels in the UK is between 30° and 40°. To ensure that your solar panels can produce energy optimally, they should be installed on a south-facing part of your roof.
[pdf] Marley SolarTile® has been designed for installation over a standard roof construction with roof battens in place and a continuous functional underfelt that terminates in a gutter. Installation kits are provided with everything needed to install the solar tiles and are designed for battens measuring 25mm thick. For. .
Marley SolarTile® is part of our comprehensive roofing system and is compatible with our entire range of roofing materials. Everything is also covered by our 15-year.
[pdf] For most homeowners, the ideal solar panel installation angle is close or equal to the latitude of your home (on a south-facing rooftop) between 30 degrees and 45 degrees.
[pdf] 
