Mária Telkes
Telkes most known work is on solar energy technologies; she discovered the ability to store thermal power.
Her work includes creating the first thermoelectric power generator in 1947 and designing the first solar heating system.
She created numerous practical thermal devices, including a miniature desalination unit for use on lifeboats, which used solar power and condensation to collect potable solar still. This invention saved the lives of airmen and sailors who would have been without water when abandoned at sea.