ISO 50001

ISO 50001 is the international standard for energy management systems. It gives organisations a framework to establish, measure and continually improve energy performance, and can serve as a compliant route for schemes such as the UK's ESOS.

ISO 50001 sets out requirements for an energy management system based on a plan-do-check-act cycle: establish a baseline, set objectives, implement measures, monitor results and improve. Certification is voluntary but widely used to structure energy programmes and to demonstrate compliance under regulations like ESOS.