European companies that do not have SME status (e.g. those with more than 250 employees) have to carry out energy audits every 4 years according to the EU Energy Efficiency Directive (or the derived national law, such as EDL-G in Germany). A DIN EN ISO 50001 certified energy management system is exempt from this obligation.
Companies that want to benefit from reductions in the German electricity or energy tax (the so-called "peak compensation") or from the special compensation scheme for the German EEG (Renewable Energies Act) surcharge must operate at least a so-called. "alternative system for improving energy efficiency for small and medium-sized enterprises" according to SpaEfV. Above certain sizes, a DIN EN ISO 50001 certified energy management system is required.
Energy costs very often have to be allocated according to causal factors. In this case, synergies may be used, and energy management can save effort.
Read more about the Modules of an energy management system.