Metered, not modelled
Solar output in Colchester
721–895 kWh per kWp a year
the middle half of 999 real Colchester systems, measured over 2024
- Systems measured 999
- Median 816
- Best 10% of roofs 954
- Rank of 49 areas 12th
- Typical system size 3.1 kWp
A typical 4 kWp system here made roughly 2,880 to 3,580 units of electricity last year.
Colchester has one of the largest metered samples in Britain. 999 solar systems here were read from their own meters through 2024, and the middle half made 721 to 895 kWh for every kWp of panels.
The best tenth reached about 954 kWh per kWp — some 25% clear of the British median of 766, and among the strongest roofs we can measure anywhere.
Only 74% of these systems face south, south-east or south-west, against 86% nationally — so part of what you see here is roof direction, not the sky.
That places Colchester 12th of 49, ahead of 37 of the areas we can measure.
At the other end, the quietest tenth of systems here made about 616 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 Colchester 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.
Colchester: the middle half of 999 systems made 721–895 kWh per kWp.
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Areas near Colchester
Neighbouring postcode areas we can also measure.
How Colchester compares
Looking for someone to fit them? MCS-certified solar installers in Colchester 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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How we measure
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