Metered, not modelled
Solar output in Swindon
666–847 kWh per kWp a year
the middle half of 119 real Swindon systems, measured over 2024
- Systems measured 119
- Median 755
- Best 10% of roofs 878
- Rank of 49 areas 38th
- Typical system size 3.4 kWp
A typical 4 kWp system here made roughly 2,660 to 3,390 units of electricity last year.
Not a forecast. 119 solar systems around Swindon were metered through 2024, and the middle half made 666 to 847 kWh for every kWp of panels.
A good roof does better still: the top tenth here reached around 878 kWh per kWp, against a British median of 766.
The local roof stock is unusually well pointed: 96% of these systems face south, south-east or south-west, against 86% nationally. Some of the figure above is orientation rather than weather.
Systems here are bigger than typical, a median of 3.4 kWp against 2.9 nationally.
That places Swindon 38th of 49, ahead of 11 of the areas we can measure.
What none of it tells you is what your own roof would do. These systems point in every direction and some have been up for fifteen years.
The spread behind that number
Every Swindon system, grouped by what it made, against Britain as a whole. The two shapes overlap heavily, which is the honest headline: your postcode nudges the result, your roof decides it.
Swindon: the middle half of 119 systems made 666–847 kWh per kWp.
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Areas near Swindon
Neighbouring postcode areas we can also measure.
How Swindon compares
Looking for someone to fit them? MCS-certified solar installers in Swindon are listed in the Solarable directory.
Output figures from openclimatefix/uk_pv (Hugging Face, CC-BY-4.0), collected by Sheffield Solar. The British median is 766 kWh per kWp. How we measure.
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