California has begun covering its canals with solar panels, potentially killing two birds with one stone, as the state is in the midst of a serious drought. To add insult to injury, the state is also continuously facing power challenges due to an ever-rising energy demand. Now, 4,000 miles could save California 63 billion gallons of water while keeping the lights on. Furthermore, this concept could potentially revolutionize the use of solar energy, as it also addresses other fundamental issues. Find out more below.

Revolutionizing the use of solar energy in the United States

We all carry the weight of the world on our shoulders at some point in our lives. However, nothing comes close to the weight the state of California is carrying at the moment. The state has been experiencing extremely low reservoir levels since the end of 2024 and the start of 2025. According to a CalMatters report, this drought crisis has placed significant strain on agriculture, and urban regions are facing water cuts.

What’s more, parts of California’s power grid are outdated, and according to Americans for a Clean Energy Grid, the grid barely keeps up with rising energy demand, especially from AI and data centers. Fortunately, innovative researchers have come up with a project that could kill two birds with one stone, and perhaps even more. It could even revolutionize the use of solar energy, as California begins covering its canals with solar panels.

California begins covering its canals with solar panels

The California Department of Water Resources, Solar Aquagrid, and Turlock Irrigation District have teamed up for the groundbreaking project called Project Nexus. The project was developed based on studies by UC Merced and UC Santa Cruz, and is officially online. The co-founder of Solar Aquagrid, Jordan Harris, stated that:

“I think we’re all highly aware of the state of emergency we’re in, with year after year of water and energy insecurity. At the same time, we need to combat climate change to produce more renewable energy and decarbonize our economy. We need bold solutions today.”

Together, they all discovered that covering 4,000 miles of open canals in California could save up to 63 billion gallons of water each year. Not only that, but it could also contribute to the U.S. solar power growth in the future.

The ingenuity behind Project Nexus

Presently, Project Nexus is a pilot 1.6 MW installation in the Central Valley of California. The Turlock Irrigation District’s canals were covered by solar panels to produce renewable power in the remote agricultural region. Further research will be conducted on the pilot’s performance. According to the research team, Project Nexus could prove that covering canals with solar panels has the following advantages:

• Keeping solar panels cool
• Enhanced solar energy efficiency and output
• Clean power production in land-constrained regions
• Prevention of water evaporation in areas prone to droughts
• Limiting the growth of algae in waterways
• Fast-track clean energy development
• Small installations can be plugged into distribution lines in proximity

A team of environmental groups previously found that 8,000 miles of aqueducts and canals could approximately produce more than 25 GW of renewable power. Sounds like a feasible solution. As the director of the Pima-Maricopa Irrigation project, David Dejong, said:

“Why disturb land that has sacred value when we could just put the solar panels over a canal and generate more efficient power?

We remain hopeful that this innovative project’s pilot phase will yield promising results, and perhaps more countries will follow suit. The concept itself is hardly new, and India was actually the first country to implement it. However, unlike Project Nexus, India’s concept utilised much heavier and more expensive materials. Fortunately, its location in rural areas has limited the need for upkeep. In other solar news, a pioneering Chinese design creates power from raindrops.

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