Implementation of a systematic energy management system to DIN EN ISO 50001 is not only the key to cutting operating and manufacturing costs considerably, it is also proving to be a competitive advantage and effective marketing tool, too. In Germany, a certified energy management system is the prerequisite for particularly energy-intensive businesses to be partially exempted from the renewables surcharge and to reduce prospective electricity and energy tax bills in the future. Companies reap the rewards of investing in energy management from day one.