Based in the Kent, Wash., American Power Systems entered the direct current power market in 1994, as a distributor of valve-regulated batteries for the uninterruptible power supply industry. It provides complete DC power solutions that include products and full life system services along with battery distribution. The company s services include engineering, design, installation, monitoring, maintenance, project management, logistics and removal services. American Power Systems also provides Environmental Protection Agency-certified battery disposal systems. The company is staffed with fully qualified DC installers and field technicians that manage crews, which are capable of a wide range of installation tasks, from small rectifier in a cell site to a complete 10,000-ampere power plant in a central office application. Systems integration is another value-added service that the company offers to customers.