21/01/2026
California is turning some of its water canals into solar power sites.
The state has begun pilot projects installing solar panels over water canals, creating shade that slows evaporation while generating clean electricity. The idea is simple but powerful: instead of building solar farms on land, use infrastructure that already exists.
Researchers estimate that if solar panels were installed over all 4,000 miles of California’s canal system, the state could save up to 63 billion gallons of water every year—water that would otherwise disappear into the air due to heat. On top of that, the same panels could produce about 13 gigawatts of renewable power—enough to power around 2 million homes per year.
Early projects, supported by the state and researchers from University of California, Merced, are already testing how well this works in real conditions. The benefits go beyond water and power: shaded canals absorb sunlight that would otherwise heat the water, reduce algae growth, and avoid using extra land for solar farms.
One structure. Two crises addressed. Water scarcity and clean energy—helped together.