American Experience: Season 35, Episode 4 - ProjectFreeTV

35 - 4: The Movement and the "Madman"

For nearly 50 years, biophysicist and inventor Mária Telkes applied her prodigious intellect to harnessing the sun's power. She designed and built the first successfully solar-powered house in 1949 but was perplexed by the knotty scientific challenge of developing a reliable and economical way to store captured solar energy.