What angle should a flat roof solar panel be mounted?

One of the most common areas of misunderstanding surrounding flat roof solar installations is the panel mounting angle. Solar panels (in the UK) produce most power when mounted at between 30 and 40 degrees to the horizontal, facing due south. It is therefore natural to assume that this is the best angle to tilt them at for flat roof installations.

Should a solar PV array be installed on a new flat roof?

Any solar designer or specifier should give the same focus to ensuring the rooftop array is installed with methods that have as little impact as possible on the building and its waterproofing and that the array works to its maximum potential for its entire lifespan. There are numerous reasons for including a solar PV array on a new flat roof.

Can solar panels be installed on a flat roof?

As with a pitched roof installation, solar panels on a flat roof can be orientated as much as 90 degrees off south, to face directly east or west, and still be worthwhile considering in terms of output performance.

Do rooftop solar installations need planning permission?

Rooftop solar installations always need building regulations approval, but rarely require planning permission. This is because they generally fall under permitted development rights, which allow homeowners to make reasonably sized changes without getting permission.

Can I install solar panels if I don't meet building regulations?

Your local authority can also apply for a Confiscation Order to take away any money you’ve earned with your system – so there’s absolutely no benefit to installing solar panels that don’t meet building regulations. It’s crucial that your solar installation follows all building regulations.

Can a PV system be integrated into a flat roof?

In some cases, PV systems can be integrated directly into flat roofs (Figure 25), although this is not common because the efficiency of PV modules is reduced because the optimum angle relative to the sun is not achieved.