Key takeaways
- • Plug-in solar in Great Britain is limited to a maximum output of 800W.
- • Savings depend heavily on how much electricity you use during daylight hours.
- • Permission may be required if you rent, lease or live in a managed building.
The best location balances sunlight, structural safety and permission. Here is how the common options compare in the UK.
Balcony railing
Convenient, no drilling with clamp mounts, but usually vertical and often north or east facing by chance. Expect 65-75 percent of the output a tilted mount would give. Needs freeholder consent.
Garden ground mount
The best performer. You choose the angle and direction, ballast the frame and site it clear of shade. Consider security and lawn access.
Flat roof
Ballasted frames at optimal tilt work well on garage and extension roofs. Check load capacity and never penetrate a waterproof membrane without advice.
Pitched roof or shed roof
Good if the pitch faces south, east or west. Requires sound structure and proper fixings into rafters.
South-facing wall or fence
Vertical, so lower annual output, but simple, tidy and often the easiest approval. Performs comparatively well in winter.
Places to avoid
North-facing surfaces, anywhere shaded between 10am and 4pm, positions overhanging public land, and anything you cannot reach safely for maintenance.
Frequently asked questions
Sources
Fact-check status: reviewed. Read our editorial policy. General information only — not electrical, legal or financial advice.