ISO 50001:2018: documentation and compliance requirements

This is what ISO 50001:2018 requires you to have, clause by clause, and what an auditor will ask to see for each of it. It covers 64 requirements across 7 areas.

It is deliberately not a checklist. A checklist asks whether you have something; this says what is required and what counts as evidence, which is the question that matters when you are building a system rather than testing one. If you would rather find out where you stand first, the same ground is covered by our free ISO 50001:2018 readiness assessment, which scores you out of 100.

4 Your organisation and what affects your energy use

Clauses 4.1, 4.2, 4.3, 4.4.

You must have written down the outside things that affect your energy use — prices, supply, laws, carbon rules, weather, technology.

Evidence: A short list of these issues, with a note of when you last looked at it.

You must have written down the inside things — ageing equipment, skills, money available, how you run the plant.

Evidence: The same list, covering internal issues.

You must have listed the people and bodies with an interest — energy supplier, landlord or tenant, regulator, customers, head office.

Evidence: A list of these groups and what each needs from you.

You must know which energy laws, reporting rules and other duties apply to you.

Evidence: A legal register covering energy reporting, carbon schemes, efficiency rules and equipment standards.

You must have written down what the energy system covers — which sites, buildings, equipment and types of energy.

Evidence: A scope and boundaries statement. Site plans. All energy types listed: electricity, gas, oil, diesel, steam, compressed air, renewables.

You must have included every type of energy inside the boundary, rather than leaving some out.

Evidence: The reasoning. You cannot leave an energy type out once it is inside the boundary.

You must know what your main processes are and how they fit together.

Evidence: A process map or a list with owners.

5 Leadership

Clauses 5.1, 5.2, 5.3.

Senior management must be able to show they are behind this — and point to energy decisions they made in the last year.

Evidence: Management review notes. Money approved for energy projects. Ask them directly.

You must have set up an energy team, and it must actually meet.

Evidence: Who is on it and what they are there to do. Meeting notes.

Senior managers must make sure energy performance really does improve, rather than just supporting the paperwork.

Evidence: Evidence they ask for results, not just reports.

You must have a written energy policy.

Evidence: The policy, signed and dated.

It must promise to keep improving energy performance, to provide the information and resources needed, and to meet legal duties.

Evidence: All three promises visible. It should also support buying energy-efficient products and designing for better energy performance.

The must be policy shared with your people.

Evidence: Where it is displayed. Ask staff.

It must be clear who is responsible for energy in each area, and who can approve energy spending.

Evidence: Organisation chart. Responsibility list. Spending limits.

6 Planning — the energy review and how you measure

Clauses 6.1, 6.3, 6.4, 6.5, 6.6, 6.2.

You must have worked out what could go wrong and what opportunities exist around energy.

Evidence: A risk and opportunity list with actions, owners and dates.

You must have analysed how and where you use energy — past and present.

Evidence: An energy review showing your energy sources and your consumption over time.

You must have identified the areas that use the most energy, using written criteria.

Evidence: Your list of significant energy uses, and the criteria you used to pick them.

For each of those areas, you must know what makes the energy use go up and down.

Evidence: The relevant variables — production volume, occupancy, weather, running hours, temperature.

You must know who influences the energy use in each of those areas.

Evidence: The people and roles named. Usually operators, maintenance and whoever sets the controls.

You must have built a list of opportunities to save energy, in priority order.

Evidence: An opportunities register with estimated savings and cost.

The must be energy review kept up to date.

Evidence: The date it was last revised, and what triggered the revision.

You must have chosen measures that show how well you are using energy, and written down why you chose them.

Evidence: Your energy performance indicators, with how each is worked out and why it was chosen. For example kWh per tonne, or kWh per square metre per degree day.

You must be able to answer: Do those measures allow for the things that change — output, weather, occupancy?

Evidence: The normalisation method. Without this, a drop in output looks like an energy saving when it is not.

You must have set a starting point — a baseline — for each measure, over a suitable period.

Evidence: The baseline figures, the period used, and why that period was chosen.

You must know when you would have to redo the baseline, and you must have written that down.

Evidence: The rules for changing it — a big change to plant, process, running pattern or method — and any changes actually made, with the old baseline kept.

You must have a plan for collecting energy data — what, how often, how and by whom.

Evidence: An energy data collection plan. Metering and sub-metering layout.

You must know the readings are accurate.

Evidence: Calibration or verification records for meters and instruments.

You must record the other things you need alongside the energy figures — output, weather, hours run.

Evidence: Records of the relevant variables and any fixed factors, kept with the consumption data.

You must have set energy objectives and targets, and they must be able to be measured.

Evidence: Objectives with a baseline, a target and a unit.

For each one, it must be clear what will be done, by whom, by when, with what, and how you will check the saving is real.

Evidence: An action plan covering all five, including how the energy saving will be verified.

7 Support — people, awareness and documents

Clauses 7.1, 7.2, 7.3, 7.4, 7.5.

You must provide the people, money, equipment and systems the energy system needs.

Evidence: Budget. Staffing. Metering and monitoring equipment bought.

You must know what skills are needed by the people who affect energy use, and you must be able to show they have them.

Evidence: Competence criteria. Skills matrix covering operators, maintenance, engineering and buyers. Training records including controls and building management systems.

The people who must be carried out the energy review competent to do it.

Evidence: Their training or experience.

Your people must know the policy, how their own actions affect energy use, and why it matters.

Evidence: Awareness sessions. Displays showing consumption. Ask staff — this is how it is tested.

You must have decided what to communicate about energy, to whom, when and by whom.

Evidence: A communication plan or table.

People must be able to suggest ways to save energy, and do those suggestions get an answer.

Evidence: A suggestion route and records showing ideas were considered.

You must have the documents and records the standard asks for.

Evidence: A list of documents and records held.

When a document is created or changed, it must be checked and approved before use.

Evidence: Approval on the document.

People must be able to find the current version, and are old versions removed.

Evidence: How documents are shared.

You must keep energy data, baselines and indicator records long enough to show improvement over years.

Evidence: A retention list. These records need keeping longer than in most other systems, because you have to show a trend.

8 Running the plant, designing and buying

Clauses 8.1, 8.2, 8.3.

For the areas that use the most energy, you must have set the conditions they should run under.

Evidence: Operating criteria — set points, running hours, sequencing, load limits, shutdown rules.

The people must who operate that equipment know those conditions.

Evidence: Evidence the criteria reached the operators, not just the file.

You must check the equipment is actually run that way.

Evidence: Monitoring records. Control system settings and change records.

Energy-using plant must be maintained so it stays efficient.

Evidence: Maintenance schedule and records. Filter changes, belt tension, insulation, steam traps, leaks.

You must control outsourced work that affects your significant energy uses.

Evidence: Contract terms. Checks on contractor work.

When you design or refurbish something that will use energy for years, you must consider energy at the design stage.

Evidence: Design briefs including energy criteria. Records showing energy was considered for new plant, refurbishment or layout changes.

You must check afterwards whether the new installation performs as expected.

Evidence: Post-installation measurement against the expected energy performance.

It must be defined when you buy energy-using equipment, is energy efficiency one of the things you judge it on.

Evidence: Purchase specifications with energy criteria. Evaluation records. Whole-life cost comparisons.

Suppliers must know they are being judged partly on energy performance.

Evidence: Evidence you told them. Wording in the enquiry or contract.

When you buy energy itself, you must specify what you need.

Evidence: Energy purchasing specification. Tariff and contract review.

9 Checking how you are doing

Clauses 9.1.1, 9.1.2, 9.2, 9.3.

You must have decided what you will measure and how often — indicators, significant energy uses, variables, operating conditions.

Evidence: A monitoring and measurement plan.

You must compare actual energy performance against your baseline, allowing for what changed.

Evidence: Indicator values plotted against the baseline over time, normalised.

When something looks wrong, you must investigate it and record what you found.

Evidence: Investigation records for significant deviations.

You must be able to tell the difference between a real saving and a drop caused by lower output or milder weather.

Evidence: The normalisation working. This is where most self-assessments are too generous.

You must check, on a set schedule, whether you comply with your legal and other energy duties.

Evidence: A compliance evaluation with dates and conclusions. Reporting submissions. Scheme returns.

You must audit the energy system, and does the audit look at energy performance as well as the paperwork.

Evidence: An audit programme covering both. Audit reports and findings.

The auditors must be independent of the work they audit, and they must understand energy.

Evidence: Auditor competence and independence records.

Senior management must review the system at planned intervals.

Evidence: Review dates and attendance.

The review must cover everything the standard asks for, including energy performance and the indicators.

Evidence: An agenda covering: previous actions, changes, policy suitability, energy performance and indicator results, compliance, audit results, objectives, resources, improvement.

The review must decide things — including whether the indicators or the baseline need changing.

Evidence: Decisions and an action list with owners and dates.

10 Putting things right and getting better

Clauses 10.1, 10.2.

When something goes wrong, you must deal with it and work out why.

Evidence: Corrective action records with root cause. This includes energy performance going the wrong way, not just system failings.

You must check whether the same problem exists elsewhere, and check later that your fix worked.

Evidence: Evidence you looked wider. A follow-up record with a date.

You must be able to show that your energy performance has actually improved — not just that the system is running.

Evidence: Indicator trends against baseline over successive periods, normalised. Completed projects with measured savings. This is what makes ISO 50001 different from every other standard, and it is the thing an auditor will press hardest on.

You must be able to show the management system itself is improving.

Evidence: Objectives achieved. Improvement register. Management review conclusions.

Using this document

Nothing above asks for a manual, a template pack, or a filing system. It asks for decisions that have been taken deliberately and can be shown to have been taken — which is a far smaller job than most organisations expect, and a different one.

Length is not compliance. A procedure nobody follows is worse than no procedure, because an auditor finds the gap between the two. The test we apply is whether the person who has to do the job recognises their own work in what is written down.