Practical Solar, Inc. is an American manufacturer of heliostats used for concentrating solar power, as well as for residential and commercial natural lighting (daylighting) applications. The company, located in Boston, Massachusetts, introduced its heliostat system for sale in February 2009.Practical Solar’s heliostats are small in the spectrum of heliostats commercially available for harnessing solar thermal energy. They each have 8 square feet (0.74 meters) of reflector area.