Established in 1963, Valley Power Systems is a family-owned and operated company that supplies engines and transmission equipment to its customers. The company provides diesel and propulsion engines for transit buses and delivery trucks. It offers marine engines and particulate matter filters in various specifications. Valley Power Systems has generators and natural gas, propane and methane engines available in several configurations. The company also sells switches, compressors and fuel tank trailers in a range of sizes. It provides several maintenance and repair services. Valley Power Systems supplies products from various companies, including Allison Transmission, Northern Lights, Deere & Company and DEUTZ. Headquartered in City of Industry, Calif., the company maintains a presence in San Diego.