By promoting renewable energies, the energy and supply market is increasingly moving in a decentralized direction. Smart grids help meet challenges related to increasing energy efficiency. Renewable energy sources also rely on intelligent information technology. The use of information technology creates integrated electricity networks with new functionalities. Intelligent controls, for example, that balance fluctuating electricity generation from renewable energies and balance electricity consumption. Intelligent measuring systems – smart meters – also challenge the IT projects of supply companies. They help increase energy efficiency and help save electricity.