ISO 50001 certificationEnergy Management

Yes, subject to the ESOS rules. If an ISO 50001 certificate covers the whole of the organisation's energy consumption, it can be used as the compliance route for that phase. If it covers only part, the rest must be covered by other routes such as an ESOS energy audit. Check the current Environment Agency guidance for the requirements that apply.

An energy baseline is a quantitative reference that provides the basis for comparing energy performance over time. It is normally set using data from a defined period, such as twelve months, and adjusted for relevant variables like production output or degree days where these significantly affect consumption. The baseline must be revised when certain conditions, such as major process changes, occur.

ISO 50001 requires demonstrated continual improvement in energy performance. At initial certification, auditors look for a robust energy review, baseline and plans that will deliver improvement. At recertification, the organisation must be able to show improvement in energy performance, measured through its energy performance indicators against the baseline.

ISO 14001 covers all environmental aspects, including emissions, waste and pollution, and energy may be one of them. ISO 50001 focuses solely on energy, with detailed requirements for energy reviews, baselines, indicators and data collection, and an explicit requirement to improve energy performance. Many organisations hold both and integrate the two systems.

The standard does not mandate specific metering. It requires an energy data collection plan suitable for your size and complexity, covering significant energy uses and relevant variables. Some organisations rely on main meter data and estimates initially, then add sub-metering where it improves accuracy. Auditors will assess whether your data is sufficient to support decisions.

No. Under ISO/IEC 17021-1 we cannot provide consultancy on systems we certify, and preparing your energy review or baseline would compromise our impartiality. You can carry out the work internally or use an independent energy professional. Our optional pre-assessment can indicate readiness without designing the system for you.

Yes, provided the sites are under one energy management system with central control of the energy review, objectives, internal audit and management review. Sampling of sites may be possible depending on their activities and energy profiles. For ESOS purposes, you should make sure the certified scope covers all relevant energy consumption.

ISO 50001 requires the energy review to be updated at defined intervals and in response to major changes in facilities, equipment, systems or processes. Most organisations update it at least annually, linked to management review. Auditors check that the review reflects current operations and that newly significant energy uses have been identified.