ISO 50001 Energy management systems – Requirements with guidance for use is a specification created by the International Organization for Standardization (ISO) for an energy management sys-tem. The standard specifies the requirements for establishing, implementing, maintaining and im-proving an energy management system, whose purpose is to enable an organization to follow a systematic approach in achieving continual improvement of energy performance, including energy efficiency, energy security, energy use and consumption. The standard aims to help organiza-tions continually reduce their energy use, and therefore their energy costs and their greenhouse gas emissions.
ISO 50001 was originally released by ISO in June 2011 and is suitable for any organization, what-ever its size, sector or geographical location. The second edition, ISO 50001:2018 was released in August of 2018.
The system is modelled after the ISO 9001 Quality Management System and the ISO 14001 Envi-ronmental Management System (EMS). Eccleston describes the procedural details of the ISO En-ergy Management System (EnMS) and compares its procedures with those of the ISO 14001 EMS.