Energy Management System (EnMS / EMS)
An energy management system is the combination of metering, software and processes used to monitor, control and continuously improve a site's energy use. A formal EnMS often follows the ISO 50001 standard.
An EnMS gives visibility of energy by line, area and utility, identifies waste, and tracks the impact of efficiency measures. It pairs hardware (meters, sub-meters, power monitoring) with analytics software and a management process. ISO 50001 provides a recognised framework for running an EnMS and is one route to ESOS compliance in the UK.
Related terms
ISO 50001 · Waste Heat Recovery
Related guides
Factory decarbonization: a practical roadmap
A sequenced, no-regrets roadmap for cutting industrial emissions — efficiency first, then electrification and fuel switching, then the hard residual.
How to improve boiler efficiency
The practical levers that move boiler efficiency — combustion, blowdown, feedwater, flue-gas heat and standing losses — and how to find them.
Software
Schneider EcoStruxure
IoT platform for energy and plant resource management.
Seeq
Advanced analytics for time-series process data.
Where this applies
Rolling out energy sub-metering · Running an energy treasure-hunt event · State of Industrial Energy Management 2026 · State of Compressed Air Efficiency 2026 · State of Industrial Water & Wastewater Management 2026