Water‑Saving Solar Boats Keep Australia Cool

Australia faces a serious water shortage. Farmers use most of the country’s supply, and droughts add to the pressure. To protect water, engineers created floating solar panels that sit on dams and reservoirs. They act like a roof, cutting evaporation while generating electricity. These panels are called floating photovoltaics or FPV. They cover part of the water surface, so less steam escapes into the air. At the same time, they capture sunlight and feed clean power to the grid, just like land‑based panels. The result is a double benefit: less water loss and more renewable energy. One study says the panels can cut evaporation by over 50 %. In 2025, the Australian Renewable Energy Agency will spend $8. 5 million to put more FPV on irrigation farms. That money shows the government sees water savings as a priority.

The Wannon Water system is one of the biggest in the country. It has 1, 260 panels and produces more than 600, 000 kWh each year. The panels catch light from the sky and from the water’s reflection, which helps lower greenhouse gases by about 600 tons annually. Another site in Gippsland uses 644 panels and can power around 90 homes at peak times. Unlike some other methods that cover the whole lake, these panels leave space open. That helps prevent algae growth and keeps water clean. Because of the environmental wins, floating solar is gaining traction not only in Australia but also in places like Germany and California.

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