California’s Project Nexus completed a 1.6-megawatt solar installation over two irrigation-canal sites in 2025, after researchers estimated that covering the state’s 6,400 kilometres of canals could prevent 63 billion gallons of annual evaporation—enough water for two million people—while the cooler microclimate above the canals could improve the panels’ efficiency.
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California’s Project Nexus completed a 1.6-megawatt solar installation over two irrigation-canal sites in 2025, after researchers estimated that covering the state’s 6,400 kilometres of canals could prevent 63 billion gallons of annual evaporation—enough water for two million people—while the cooler microclimate above the canals could improve the panels’ efficiency.

California’s Project Nexus finished two solar-canopy installations over working irrigation canals in 2025. Together they provide more than…