The Sahara solar myth: could it power the entire world?

Social media's favorite line: 'covering 1% of the Sahara with solar panels would power the entire world'. Mathematically true. But technically impossible for 50 years.

The math is right

Sahara is 3.5 million sqmi. 2024 world electrical demand: 30000 TWh/year. With 5 sun hours/day and 22% efficiency, 35000 sqmi (1% of Sahara) produces 31000 TWh/year. Yes, it would cover it.

Problem 1: transmission

Light hits panels in Africa. Europe, Asia and America consume it. Distance 1900-9300 mi. HVDC line loses 3% per 600 mi. Total: 30-50% losses. Energy would arrive, but half lost in the wire.

Problem 2: sand

Sahara sandstorms cover panels in hours. Daily cleaning of 35000 sqmi requires water and labor that don't exist. Soiling loss would be 20-40% of production.

Problem 3: heat reduces efficiency

Panels at 122-140 °F (typical Sahara) lose 12-15% efficiency. Real Sahara efficiency: 18% instead of 22%. Cooling 35000 sqmi is impossible.

Problem 4: geopolitics

Sovereignty crisis: who owns and controls the panels? African nations won't accept Europe exploiting them. Europe won't depend on unstable governments (terrorism risk, coups, nationalizations).

What IS being done

Morocco: Noor plant 580 MW (concentrated solar thermal). Egypt: Benban 1.5 GW. UAE: Mohammed bin Rashid Al Maktoum 5 GW. But all consumed LOCALLY. Transcontinental transmission remains the bottleneck.

The Desertec project (RIP)

European initiative (2009) to ship Sahara energy to Europe via submarine cables through Gibraltar and Sicily. Had €100 billion budget. Cancelled in 2014 due to costs and geopolitical risk. Now revived at small scale (Morocco-UK).

More curiosities in the largest solar plant 2026.