Faiman’s theoretical physics research focused on hadron spectroscopy using the quark model and various associated symmetries. His solar energy research spanned studies of solar radiation, energy conversion devices, and power-producing systems. His most celebrated work was the development, in collaboration with the Zenith Solar Company, of a 10 m2 mirrored, sun-tracking dish, which concentrated the sun’s rays 1,000 times onto a water-cooled solar array of dimensions 100 cm2. Under full sunshine, this system generated 2 kW of electric power and 5 kW of thermal power, the latter in the form of hot water at 80oC. Faiman was Israel’s representative on solar energy to UNESCO, the FAO and Tasks 2 and 8 of the International Energy Agency. Within the latter framework he co-authored the series of books Energy from the Desert.