Solar panels in Scotland

Q: How many solar panels do I need in Scotland?

About 9 panels for a home using 2,500 kWh a year. Each 400W panel produces roughly 285 kWh annually at Scotland sunlight levels. Your own figure depends on actual usage — pull a year of bills rather than assuming average consumption, since heating and EV charging change it a lot.

Q: How much do solar panels cost in Scotland?

A 3.6 kW system runs about £6,120 before incentives, or roughly £1.70 per watt installed. Quotes vary widely by installer, roof complexity and whether your electrical panel needs upgrading — get three before deciding.

Roofs across Scotland get about 839 hours of usable sunlight a year, and electricity costs 26.1p/kWh. That combination puts a typical system's payback at 14.2 years. Here's the detail, from real rooftop data across 9 Scotland cities.

839Sun hours / yr

26.1pPer kWh

9Panels typical

14.2 yrPayback

Solar is a slow payback in Scotland. At 14.2 years, mostly because electricity here costs 26.1p/kWh, this only makes sense as a long-horizon decision or with local incentives. Check the numbers hard.

Check your own roof in Scotland → These are regional figures; your roof's size, pitch and shading move them a lot.

How Scotland compares

Scotland gets more sunlight than 1% of the cities we measure, and its electricity costs more than 77% of states and provinces. Both matter, but not equally: the electricity rate usually matters more, because solar saves money by replacing power you would otherwise buy. A sunny state with cheap power often pays back slower than a cloudy state with expensive power. Why that happens →

Solar by city in Scotland

City	Sun hrs/yr	Panels	Net cost	Payback
Perth	885	9	£6,120	13.6 yrs
Dundee	853	9	£6,120	14 yrs
Edinburgh	848	9	£6,120	14.1 yrs
Aberdeen	841	9	£6,120	14.2 yrs
Stirling	839	9	£6,120	14.2 yrs
Ayr	834	9	£6,120	14.2 yrs
Falkirk	811	10	£6,800	15 yrs
Glasgow	797	10	£6,800	15.2 yrs
Inverness	759	10	£6,800	15.7 yrs

What a system costs in Scotland

System	Size	kWh/yr	Net cost	Saves/yr	Payback
8 panels	3.2 kW	2,282	£9,120	£596	15.3 yrs
12 panels	4.8 kW	3,423	£13,680	£894	15.3 yrs
16 panels	6.4 kW	4,564	£18,240	£1,192	15.3 yrs
20 panels	8 kW	5,705	£22,800	£1,490	15.3 yrs
26 panels	10.4 kW	7,417	£29,640	£1,937	15.3 yrs

Payback stops improving as systems grow, then gets worse. You can only save on electricity you were going to buy, so once a system covers your usage the extra panels mostly export at a lower rate.

Scotland solar incentives

The 30% US federal tax credit does not apply in Canada, and the figures on this page exclude it. Canadian support comes through federal programmes such as the Canada Greener Homes Loan plus provincial and utility schemes, which vary and change — check current Scotland programmes directly rather than trusting a figure on a website.

Check your net metering rules. What your utility credits you for exported power drives your return more than most rebates do, and it differs by utility.

Scotland solar questions

Is solar worth it in Scotland?

At 26.1p/kWh and 839 usable sun hours, a typical Scotland system pays back in about 14.2 years and returns roughly £4,669 across a 25-year panel life. That is slower than average, so compare at least three quotes before committing. Individual cities in Scotland vary widely around this average.

How many solar panels do I need in Scotland?

About 9 panels for a home using 2,500 kWh a year. Each 400W panel produces roughly 285 kWh annually at Scotland sunlight levels. Your own figure depends on actual usage — pull a year of bills rather than assuming average consumption, since heating and EV charging change it a lot.

How much do solar panels cost in Scotland?

A 3.6 kW system runs about £6,120 before incentives, or roughly £1.70 per watt installed. Quotes vary widely by installer, roof complexity and whether your electrical panel needs upgrading — get three before deciding.

Worth reading before you buy

What you get paid for exported powerA 3p vs 15p tariff changes payback by years 12 questions to ask before signingIdentical systems vary 30–40% in price Is solar worth it in the UK?UK guide Is a battery worth it in the UK?UK guide

Regional estimates generated 2026-08-22 from Google Solar API rooftop samples across 9 Scotland cities, and average Scotland electricity rates. Not a quote and not financial or tax advice.