The requirement for a certified energy management system is settled by consumption: a company whose average annual final energy consumption over the three preceding calendar years exceeds 23.6 GWh must, under the revised EU directive, have the system in use; the Swedish act implementing the requirement is planned to enter into force on 1 January 2027, and until then the Act (2014:266) on energy audits in large companies applies. ISO 50001 is the international standard for such a system, and a certified system also takes care of the energy audit requirement to the extent the certification covers energy use.
When is a certified energy management system required?
Under the revised EU directive the requirement has two tiers. A company consuming over 2.78 GWh a year carries out an energy audit at least every four years, and a company consuming over 23.6 GWh a year additionally implements a certified energy management system. Both tiers originate in the EU Energy Efficiency Directive (2023/1791), whose Article 11 sets the thresholds at 10 TJ and 85 TJ a year and gives the deadlines of 11 October 2026 and 11 October 2027.
The threshold is compared with the average annual final energy consumption over the three preceding calendar years, and every energy type counts: electricity, heat and fuels. Which items are left outside final energy consumption is something we work through against the Swedish Energy Agency’s current guidance before the calculation is locked, because in a borderline case the exclusions decide the outcome.
How is the three-year average calculated?
The final energy consumption of the three preceding calendar years is added up and the sum divided by three, and all sites within the same company belong to the same sum. The example company has three sites. Its own consumption figures as the example’s input data are 21,400 MWh for 2023, 24,900 MWh for 2024 and, for 2025 by site, 12,300, 8,200 and 4,600 MWh. Final energy consumption in 2025 is therefore 12,300 + 8,200 + 4,600 = 25,100 MWh.
The three-year total is 21,400 + 24,900 + 25,100 = 71,400 MWh. The average is 71,400 / 3 = 23,800 MWh, which exceeds the 23,600 MWh threshold. The example company therefore falls within the energy management requirement, and the certified system has to be in use under the revised directive (the Swedish act is planned from 1 January 2027).
Close to the threshold a single year decides. If the same company’s consumption in 2023 had been 18,000 MWh, the total would be 68,000 MWh and the average 68,000 / 3 = 22,666.7 MWh. The average would then exceed 2,780 megawatt-hours but not 23,600, and the requirement would be an energy audit, which a company covered for the first time has to complete under the directive by 11 October 2026 (the Swedish act is planned from 1 January 2027). A check of your own situation takes a few minutes with the calculator.
What does ISO 50001 mean in practice?
The standard builds a procedure, not a report. The company sets an energy policy, reviews its energy use, picks a baseline and indicators, sets targets, draws up an action plan, monitors the result and takes the whole through a management review. It is the same work an audit does once, but built into day-to-day operations: consumption is monitored every year instead of every fourth.
Certification is bought separately. An independent certification body assesses the system and the price of the assessment is agreed directly with the body, so it is not part of the consulting work. After the initial assessment the body carries out recurring assessments, and it sets that rhythm.
Scope is what decides the benefit. The certificate applies to the functions inside the system’s scope, so a scope that leaves a large share of energy use outside also leaves part of the requirements outside. In the example company 95 per cent of energy use sits in two production plants, so limiting the scope to those covers most of it with a single system. How much coverage is required for the audit requirement to be considered met we check against the Swedish Energy Agency’s guidance before the scope is fixed.
The monitoring the system requires also produces data that reveals other saving targets, for example demand charge optimisation.
Is ISO 14001 or an energy service agreement enough?
ISO 14001 is an environmental management system and does not contain the energy management requirements, so it is not enough on its own. If a combination of a certified environmental management system and an energy audit meeting the requirements is accepted, we check that against the authority’s guidance; in practice the missing part is the audit itself, and it can be carried out within the existing system so that maintenance is not duplicated.
An energy service agreement, that is an EPC or ESCO contract, can cover the requirement to the extent the final energy consumption falls within the scope of the agreement. Annex XV of the directive sets requirements for the content of the agreement: actual monitoring of consumption, measures implemented, measurement of progress, and remuneration tied to the improvement in energy efficiency. Whether such an agreement is accepted as an alternative in Sweden, and on what conditions, we check against the applicable rules before you count on it.
Scope is the essential thing here too. If the example company’s agreement covers the heating of two properties, that is 15 per cent of final energy consumption, any exemption applies only to that part and the remaining 85 per cent needs a route of its own.
How is the choice made?
In practice the order is always the same:
- Calculate the average for the three preceding calendar years with the right exclusions and see which threshold it exceeds.
- Map what already exists: a certified environmental management system, an energy service agreement or a recent audit. What is already in place decides the choice more often than the content of the standard.
- Set the system’s scope so that no requirement is left outside, and for a group check whether one certificate covering the group’s energy use is enough.
- Fix the deadlines: the certified system in use under the revised directive (the Swedish act is planned from 1 January 2027) and the audit for a company covered for the first time under the directive by 11 October 2026 (the Swedish act is planned from 1 January 2027).
At Iiva we sell neither equipment nor electricity, so the recommended route does not depend on what the company buys afterwards. Our experts calculate the consumption threshold from your own figures and tell you which route requires the least new maintenance.
We start with the three-year average and a review of the current systems. Read about the energy management system service or check with the calculator which requirement applies to your company.