E.ON SE operates as an energy company in Germany, the United Kingdom, Sweden, the Netherlands, rest of Europe, and internationally. It operates through two segments, Energy Networks and Customer Solutions. The Energy Networks segment operates power and gas distribution networks, as well as provides maintenance, repairs, and related services. The Customer Solutions segment supplies power, gas, and heat, as well as with products and services that enhance energy efficiency to residential, small and medium-sized enterprises, large commercial and industrial, sales partners, and public entities. Additionally, it provides SmartSim, a software solution that allows renewable gases to be fed into gas grids; gas quality tracking solutions; GasPro, a mobile gas sample collector; metering solutions; and GasCalc, a software that calculates natural gases, LNG, and biogases properties. The company was founded in 1923 and is headquartered in Essen, Germany.