This includes power boilers, turbines, generators, transformers, breakers, motors, battery systems, uninterruptible power supplies, variable speed drives, distributive process control systems, programmable logic controllers, relay logic, motor-operated valves, damper drives, lighting, heat tracing, telephones, intercoms and various field devices. Xcel Energy (NASDAQ: XEL) is a leading energy provider and Fortune 500 company, dedicated to serving millions of electricity and natural gas customers across eight states: Minnesota, Colorado, Wisconsin, Michigan, North Dakota, South Dakota, New Mexico and Texas.