Berkshire Hathaway Energy Company, through its subsidiaries, generates, transmits, stores, distributes, and supplies energy. The company generates energy from coal, natural gas, hydroelectric, wind, solar, geothermal, and nuclear resources. As of December 31, 2017, it served 4.9 million electric and natural gas customers in 11 states in the United States, served 3.9 million end-users in northern England, operated approximately 32,900 miles of transmission lines, owned approximately 31,800 megawatts of generation in operation and under construction etc.