Metered, not modelled
Wakefield vs Manchester
Wakefield roofs made about 6% more than Manchester roofs last year.
726 against 684 kWh per kWp at the median, from 63 and 2,025 real systems.
Where the two actually overlap
Both areas, grouped by what each system made. The medians differ, but the shapes sit largely on top of one another — a good Manchester roof beats a poor Wakefield one comfortably. Location moves the odds; it does not decide the outcome.
Wakefield: the middle half of 63 systems made 601–814 kWh per kWp. Manchester: the middle half of 2,025 systems made 611–746 kWh per kWp.
Both figures are what real systems metered last year, so the gap mixes sunlight with system age, roof direction and shading. It is the difference in what people actually got, not a difference in sunshine alone.
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Output figures from openclimatefix/uk_pv (Hugging Face, CC-BY-4.0), collected by Sheffield Solar. How we measure.
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