Question 1

What makes a roof suitable for solar panels?

Accepted Answer

The main factors are roof direction, pitch, shading, and structural condition. South-facing roofs are ideal, but south-east, south-west, east, and west-facing roofs all work well. A standard pitch of 30–40 degrees is optimal. Minimal shading from trees or neighbouring buildings is important. The roof also needs to be structurally sound enough to support the panels.

Question 2

Can I install solar panels on a north-facing roof?

Accepted Answer

North-facing roofs receive around 55% of the output of a south-facing roof, which significantly reduces financial returns. In most cases, a north-facing roof is not recommended for solar. However, if you also have east or west-facing roof sections, those may still be viable.

Question 3

Does roof pitch matter for solar panels?

Accepted Answer

Yes, but less than you might think. A pitch of 30–40 degrees is optimal for the UK. Flat roofs can use angled mounting frames (they lose about 10% efficiency). Shallow roofs (10–20 degrees) lose around 5%. Even steep roofs (50 degrees+) still produce about 85% of maximum output.

Question 4

How does shading affect solar panel performance?

Accepted Answer

Shading can significantly reduce output. Light shading (a small part of the day) reduces generation by around 10%. Moderate shading (several hours) reduces it by 25%. Heavy shading (much of the day) can cut output by 45% or more. Modern micro-inverters and optimisers can help mitigate partial shading.

Question 5

Can I install solar panels on a flat roof?

Accepted Answer

Yes. Flat roofs are suitable for solar panels using angled mounting frames that tilt panels to an optimal angle. This typically achieves around 90% of the performance of a pitched roof. Flat roofs can also offer flexibility in panel orientation since you are not constrained by roof direction.

Question 6

Do I need planning permission for solar panels?

Accepted Answer

In most cases, no. Solar panels on residential properties in England, Scotland, and Wales fall under permitted development rights. The main exceptions are listed buildings, conservation areas, and panels that protrude significantly from the roof plane. Always check with your local planning authority if you are unsure.

Is Your Roof Suitable for Solar Panels?

Ready to see what solar could save you?

Frequently asked questions

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Is Your Roof Suitable for Solar Panels?

Ready to see what solar could save you?

Frequently asked questions

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