Since its founding in 1977, System Engineering International has built its identity around American-made critical-power equipment from its 24,000-square-foot Frederick, Maryland, manufacturing facility. With more than 30,000 systems shipped worldwide, the company is known for supporting infrastructure that cannot afford a power interruption, particularly in industrial and telecommunications settings. SEI also helped shape the IEEE 802.3af Power over Ethernet standard and has manufactured midspan equipment since 2003.
Stored Energy Systems (SENS)Founded in 1971 by battery-industry veteran Herb Kaewert, Stored Energy Systems (SENS) designs and manufactures DC power and engine-starting systems for mission-critical infrastructure. The Colorado-based company now makes its equipment in U.S. facilities spanning more than 130,000 square feet, using worst-case design and factory testing for applications where downtime is not an option. SENS has maintained ISO 9001 certification since 1996 and says its systems support more than 75% of North American critical-power gensets above 500 kW.334519HATFIELD, PA
Switching Power, IncSince 1976, Long Island-based Switching Power, Inc. has designed and manufactured switching-mode power supplies for mission-critical defense systems and demanding medical, industrial, and commercial equipment. Its vertically integrated, 30,000-square-foot U.S. facility handles engineering and manufacturing under one roof, supporting both standard products and custom systems for platforms ranging from airborne and shipboard equipment to mobile radar. SPI’s patented power-conversion technologies and documented work on programs such as PAVE PAWS, G/ATOR, and Q-53 reflect a specialty in rugged, long-service power electronics.RONKONKOMA, NY
PwrQSince 1995, PwrQ has grown from a Hanover, Maryland headquarters into a 220,000-square-foot manufacturing operation serving critical infrastructure across North America. The company combines in-house engineering with vertically integrated production to build power distribution systems for data centers, renewable energy projects, and commercial and industrial facilities. PwrQ is now part of Forgent.HANOVER, MD
Integrated Power DesignsSince its founding in April 1985, Integrated Power Designs has operated as a U.S. manufacturer from Wilkes-Barre, Pennsylvania. Its factory designs and assembles power supplies for equipment makers in fields such as medical technology and industrial electronics, while its ISO 17025-compliant safety lab supports testing for custom products.335999HANOVER TOWNSHIP, PA