Metered, not modelled
Solar output in Bath
673–872 kWh per kWp a year
the middle half of 59 real Bath systems, measured over 2024
- Systems measured 59
- Median 793
- Best 10% of roofs 902
- Rank of 49 areas 20th
- Typical system size 3.5 kWp
A typical 4 kWp system here made roughly 2,690 to 3,490 units of electricity last year.
Not a forecast. 59 solar systems around Bath were metered through 2024, and the middle half made 673 to 872 kWh for every kWp of panels.
A good roof does better still: the top tenth here reached around 902 kWh per kWp, against a British median of 766.
Systems here are bigger than typical, a median of 3.5 kWp against 2.9 nationally.
That places Bath 20th of 49, ahead of 29 of the areas we can measure.
At the other end, the quietest tenth of systems here made about 535 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 Bath 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.
Bath: the middle half of 59 systems made 673–872 kWh per kWp.
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Areas near Bath
Neighbouring postcode areas we can also measure.
How Bath compares
Looking for someone to fit them? MCS-certified solar installers in Bath 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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