Return on Investment By assuring an improved operating environment, best in class power mitigating equipment offers the highest potential for rewards and profits. On Power AC interfaces pay for themselves. Power Quality Seminars Our seminars provide our clients with an understanding of the impact of power variables on electronic systems. Clients will view live demonstrations and come away with an understanding of the benefits of current power protection products. On Power Systems is the nation's largest independent power quality equipment supplier and a member of the ONCA Group of companies. Since 1982 our customers have benefited from our experience and expertise to help them implement mitigating solutions that have dramatically reduced the occurrence of unplanned shutdowns and interruptions of critical operating systems.