Metered, not modelled
Solar output in North Wales
828–896 kWh per kWp a year
the middle half of 53 real North Wales systems, measured over 2024
- Systems measured 53
- Median 861
- Best 10% of roofs 910
- Rank of 49 areas 3rd
- Typical system size 3.5 kWp
A typical 4 kWp system here made roughly 3,310 to 3,580 units of electricity last year.
Not a forecast. 53 solar systems around North Wales were metered through 2024, and the middle half made 828 to 896 kWh for every kWp of panels.
A good roof does better still: the top tenth here reached around 910 kWh per kWp, against a British median of 766.
Systems here land unusually close together — just 68 kWh per kWp between the lower and upper quarter, against 161 nationally. Results in North Wales are more predictable than most of Britain.
That puts North Wales 3rd of the 49 postcode areas we can measure.
Systems here are bigger than typical, a median of 3.5 kWp against 2.9 nationally.
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 North Wales 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.
North Wales: the middle half of 53 systems made 828–896 kWh per kWp.
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Areas near North Wales
Neighbouring postcode areas we can also measure.
How North Wales compares
Looking for someone to fit them? MCS-certified solar installers in North Wales 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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