How do I install solar panels on a flat roof?

There are a few crucial steps to follow when installing solar panels on a flat roof: To start the process, an engineer will carry out a structural survey to check if your roof is suitable for handling the solar panels' weight and the ballast used to secure them.

Should you install solar panels on your roof?

Installing solar panels on your roof can both save you energy costs and reduce your home’s environmental impact. Even though there are some DIY solar panel options, installing them is a highly complex project, and you’ll still need assistance from an experienced professional.

What is a roof mounted photovoltaic system guidance?

The guidance refers only to the mechanical installation of roof mounted integrated and stand-off photovoltaic systems; it provides best practice guidance on installation requirements and does not constitute fixing instructions.

How much does a solar panel weigh on a flat roof?

As mentioned earlier, solar panels on a flat roof need a heavy ballasted mounting system to stay secure in high winds. And that ballast can make a solar panel up to five times heavier than a typical non-ballasted panel. A ballasted solar panel can weigh around 100kg, whereas a non-ballasted solar panel is only about 20kg.

Can solar panels be mounted on a flat roof?

For solar panels on a flat roof, mounting systems are slightly different and can include a triangle 'ballast' box to support the panels. For solar thermal panels (with cells that use the sun's heat to warm water in a house) things are a little different.

How many solar panels can be installed on a roof?

Your roof will need to be large enough to fit a suitable number of solar panels, as there’s rarely much point putting just two or three panels up there. The average solar panel takes up 2m², and your installer should leave around 40cm on each side of the array, as well as 3cm between every panel.