08/29/2025
In 1948, scientist Mária Telkes—nicknamed “The Sun Queen”—designed a groundbreaking house in Massachusetts that stayed warm throughout freezing winters using only sunlight and salt, without relying on gas or electricity. In collaboration with architect Eleanor Raymond, she created the Dover Sun House, which used Glauber’s salt (sodium sulfate), a phase-change material, to store solar energy and release it gradually as heat. It became one of the first passive solar-heated homes in the world—and it functioned even on cloudy days.
But Telkes's work was about more than just technology—it was about liberation. She believed that energy innovation should serve everyday people, especially women who struggled with smoke-filled kitchens and inadequate heating. Over the years, she developed solar ovens, desalination systems, and off-grid technologies that empowered communities across the globe. With more than 20 patents and a lasting impact on sustainable energy, Mária Telkes proved that clean energy isn't just a future ideal—it has been possible for generations.
Sources:
J. Perlin, Let It Shine: The 6,000-Year Story of Solar Energy. New World Library, 2013.
National Inventors Hall of Fame, “Mária Telkes.”
Smithsonian Magazine, “The Sun Queen and the Science of Solar Homes,” 2021.
