Civic & public Cardiff · CF14 4XW

Could University Hospital of Wales, Cardiff go solar?

In Cardiff, the University Hospital of Wales runs day and night, so power made on its own roof would be used more or less as it lands. Its broad flat decks cover about 28,700 square metres — enough, we estimate, for roughly 4.4 MW of solar and some 11,000 panels. That points to an estimated 3.7 to 4.4 million kWh a year, on paper matching around 1,500 homes.

The University Hospital of Wales in Cardiff from overhead, showing the long flat roof decks of its teaching and ward blocks.
Roof capacity
4.4 MWp
~11,082 panels at full fit
Annual generation
3.7 GWh–4.4 GWh
across the whole roof
Could power
~1,498
average UK homes
CO₂ saved
~1,938 t
per year, at full capacity

Roof area read from above: ~28,711 m²on a 29,911 m² building footprint.Imagery dated 2025-05-14.

Full methodology, assumptions and cross-checks: how we measure. Includes solar data from Google.

Morning sun on the rooftop solar panels of a red-brick UK semi-detached home

That was someone else's roof.

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