Metered, not modelled
Solar output in Cambridge
803–928 kWh per kWp a year
the middle half of 416 real Cambridge systems, measured over 2024
- Systems measured 416
- Median 871
- Best 10% of roofs 955
- Rank of 49 areas 2nd
- Typical system size 3.4 kWp
A typical 4 kWp system here made roughly 3,210 to 3,710 units of electricity last year.
Not a forecast. 416 solar systems around Cambridge were metered through 2024, and the middle half made 803 to 928 kWh for every kWp of panels.
The best tenth reached about 955 kWh per kWp — some 25% clear of the British median of 766, and among the strongest roofs we can measure anywhere.
That puts Cambridge 2nd of the 49 postcode areas we can measure.
Systems here are bigger than typical, a median of 3.4 kWp against 2.9 nationally.
At the other end, the quietest tenth of systems here made about 719 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 Cambridge 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.
Cambridge: the middle half of 416 systems made 803–928 kWh per kWp.
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Areas near Cambridge
Neighbouring postcode areas we can also measure.
How Cambridge compares
Looking for someone to fit them? MCS-certified solar installers in Cambridge 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.
Related
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Address-based roof check. Postcode in, Solarable Report out.
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What a kWp really generates in Britain, modelled and metered.
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Solar savings calculator
Annual benefit and payback in honest UK ranges.
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How we measure
Our sources, our cross-checks, and what we refuse to publish.
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How much sun does my roof get?
How sunlight falls on a UK roof, month by month.
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