Rocktronics, 1464 E Valencia Dr, Fullerton, CA 92831, US

HistoryFounded in 1991, ESL began as a custom control panel business located in Yorba Linda, CA. In 1995, ESL Power Systems, Inc. emerged as a manufacturer of safety-interlocked reefer outlets, and soon began to develop cord-connected electrical power equipment for a wide variety of industrial and commercial applications. Thirteen years after founding, the ESL Family of Companies moved 8 miles east to a 36,000 sq.ft. facility in Corona, CA. Today, ESL Power Systems, Inc. operates as a single company offering cord-connected electrical power equipment and is still the premier Custom Control panel Builder in Southern California!SpecialtiesESL Power Systems, Inc. is one of the largest manufacturers of reefer outlets worldwide supporting Intermodal Container industry and Port Terminals. ESL is known as the best-in-class builders of Ship-to-Shore Power Mounds, Company Switches for Set Stage applications, and also for our StormSwitch and TripleSwitch product lines for back-up power during grid outages. And, of course, the premier Custom Control panel Builder in Southern California!