The raw comparison

UK average: 2.53 kWh/m²/day. London in December: 0.52 kWh/m²/day.^1

Cuba average: 5 kWh/m²/day. Peak summer: 26 MJ/m²/day.^3

Cuba gets roughly twice the solar energy per square metre as the UK on an average day. In winter months it is closer to ten times more than a UK December.^2

The output maths for Cuba

Cuba's land area: 109,884 km². Even covering just 1% of that with solar panels at standard 20% efficiency:

• 1% of 109,884 km² = 1,099 km² = 1,099,000,000 m²
• At 5 kWh/m²/day × 20% efficiency = 1 kWh per m² per day
• Total: 1,099,000,000 kWh/day = ~1,099 TWh/year

Cuba's entire national electricity consumption is approximately 16 TWh/year.^4

1% of Cuba's land area, covered in solar panels, would generate 68 times Cuba's total electricity needs.^4

Cuba set a solar generation record in February 2026: 900 MW at midday — with only 1,000 MW of installed capacity. The target for 2028 is 2,000 MW, financed by China. Cuba is doing this now, on Chinese credit, after the grid collapsed — not with the \$24.2 billion GAESA had sitting in hotel investments.^5^7