ISO 50001 is the International Standard for Energy Management Systems.
The old version is ISO 50001:2011 Energy management systems were published in 2011 and ISO published a revised version of ISO 50001 in 2018.
This ISO 50001:2018 standard specifies the requirements for establishing, implementing, maintaining and improving an energy management system.
The purpose of ISO 50001:2018 is to an organization have to follow a systematic approach in achieving continual improvement of energy performance. It includes energy efficiency, security, energy consumption, and use.
The revised version reflects to promote adoption of the standard among small and medium-sized enterprises.