NRG Energy is a company engaged in producing and selling energy and related products and services. It sells power, natural gas, and home and power services, and develops sustainable solutions. The company offers line and surge protection products, home security and protection products, carbon offsets, back-up power stations, portable power, portable solar, and portable lighting as well as a range of solutions such as HVAC installation, repair and maintenance, system power, distributed generation, carbon management, renewables, backup generation, storage and distributed solar, along with demand response, energy efficiency, and advisory services. NRG Energy operates energy production, cogeneration, and energy resource recovery facilities. The company serves residential, commercial, industrial, and wholesale customers.