Daggett was also home to a unique solar thermal energy plant named Solar One, a pilot project which was operational from 1982 to 1986. The plant used mirror-like heliostats to aim sunlight at a collecting cylinder located on a solar power tower (a type of solar furnace), through which oil flowed. The large quantity of sunlight reflected on the sphere superheated the oil, which was then used to create steam for power generation. The plant was upgraded in 1995 as part of the Solar Two project. Solar Two substituted molten salt compounds instead of oil as an energy storage medium.