Profile: Sunpower, Inc. manufactures free-piston machines. Our product line comprises of stirling engines, coolers, cryocoolers and compressors. Our products are used in household refrigerators, cogeneration units, aerospace, military electric generators, medical devices and nuclear material detection devices. We deliver research and development engineering services, which include paper studies, prototype development, pilot production and technology transfers. Our machines use gas bearings, compact linear alternators, motors and free-piston design. Our cryocoollers are used in telecommunication superconducting filters, cryosurgery, pharmaceutical mixers and nuclear material detectors. Our linear compressors are used in oxygen concentrators, household refrigerators and cryosurgery systems.