Could Windsor Castle go solar?

Point the estimate at Windsor Castle and it lands on the State Apartments range of the Upper Ward — the oldest occupied castle in the world. Those roofs measure around 9,000 sq m, a theoretical 1.1 MW and 2,760-odd panels, or 910,000–1.1 million kWh a year. Grade I listing and a working royal residence mean the figure is a curiosity, not a scheme.

Roof area read from above: ~9,058 m².Imagery dated 2020-06-24.

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

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