Metered, not modelled
Solar output in Derby
695–797 kWh per kWp a year
the middle half of 245 real Derby systems, measured over 2024
- Systems measured 245
- Median 756
- Best 10% of roofs 834
- Rank of 49 areas 37th
- Typical system size 2.8 kWp
A typical 4 kWp system here made roughly 2,780 to 3,190 units of electricity last year.
Not a forecast. 245 solar systems around Derby were metered through 2024, and the middle half made 695 to 797 kWh for every kWp of panels.
A good roof does better still: the top tenth here reached around 834 kWh per kWp, against a British median of 766.
Systems here land unusually close together — just 102 kWh per kWp between the lower and upper quarter, against 161 nationally. Results in Derby are more predictable than most of Britain.
That places Derby 37th of 49, ahead of 12 of the areas we can measure.
At the other end, the quietest tenth of systems here made about 613 kWh per kWp — usually shade, a poor direction, or both.
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 Derby 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.
Derby: the middle half of 245 systems made 695–797 kWh per kWp.
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Areas near Derby
Neighbouring postcode areas we can also measure.
How Derby compares
Looking for someone to fit them? MCS-certified solar installers in Derby 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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