How ISO 50001 certification helps to improve energy performance
Many of the companies we work with wonder whether an energy management system is right for them. It is often not a simple question to answer; the organisational effort involved is considerable, but the benefits can result in substantial cost savings.
Rising energy prices and increasing regulatory requirements are forcing companies to consider how they can control and reduce energy costs in the long term. In practice, however, it is often the case that without a structured approach, potential savings in energy consumption frequently go undetected. This is precisely where an energy management system comes in. It provides transparency regarding energy flows, enables a systematic analysis of energy usage, and forms the basis for targeted efficiency measures.
A key principle of modern energy management systems is the continuous improvement process based on the PDCA cycle (Plan–Do–Check–Act). Companies plan energy efficiency measures, implement them, review the results using appropriate performance indicators, and continuously adapt their strategy. This process is supported by international standards such as ISO 50006, which describes methods for establishing energy performance indicators, and ISO 50015, which defines procedures for measuring and verifying energy savings.
When implemented correctly, an energy management system therefore not only helps companies to better understand their energy consumption—it also lays the groundwork for sustainably reducing energy costs and systematically tapping into efficiency potential.
Why ISO 50001 certification can reduce energy costs in the long term
An energy management system (EnMS) helps companies to reduce energy costs not just on an ad hoc basis, but in a sustained and systematic manner. The key benefit is that energy consumption is no longer assessed solely on the basis of bills but is instead analysed in a structured manner and monitored continuously. By recording energy flows, identifying major energy consumers, and establishing appropriate energy indicators, it becomes clear where energy—and therefore costs—are actually being incurred within the company. This transparency forms the basis for targeted efficiency measures—such as process optimisation, the replacement of inefficient equipment, or improved operational management.
At the same time, an energy management system ensures that energy-saving measures are not a one-off exercise. Through clearly defined targets, regular reviews, and a structured improvement process, energy efficiency measures are continuously refined and adapted to new circumstances. This results in measurable efficiency gains over time, which are directly reflected in lower energy costs. An energy management system thus becomes a key tool not only for consuming energy but also for strategically managing and economically optimising it.
Der PDCA-Zyklus im Energiemanagement: Kontinuierliche Verbesserung der Energieeffizienz
The PDCA cycle (Plan–Do–Check–Act) forms the core principle of effective energy management systems and ensures that energy efficiency is not viewed as a one-off project but as a continuous improvement process. In the first “”step—”Plan”—companies analyze their energy consumption, identify key energy uses, and define specific energy targets as well as measures to improve energy efficiency. This is followed by the “Do” phase, in which these measures are put into practice, for example, through technical optimisations, organisational changes or investments in more efficient equipment.
In the “Check” phase, the system then verifies whether the measures implemented are actually achieving the desired results. Energy performance indicators and measurement data play a key role here in enabling a transparent assessment of changes in energy consumption. Finally, the “Act” phase follows: based on the insights gained, measures are adjusted, successful approaches are further developed, and new opportunities for improvement are identified. Regular repetition of this cycle creates a structured process that helps companies to increase energy efficiency in the long term and reduce energy costs step by step.
Energy performance indicators in accordance with ISO 50006: Making energy efficiency measurable
In order to improve energy efficiency in a targeted manner, changes in energy consumption must be truly measurable and traceable. This is precisely where ISO 50006 comes in. It describes how so-called Energy Performance Indicators (EnPI) and suitable energy baselines can be established. The aim is not to view energy consumption in isolation but to relate it to relevant influencing factors—such as production volume, operating hours, or building floor area. It is only through this contextual analysis that it becomes clear whether energy efficiency has actually improved or whether changes are merely attributable to external factors.
We’re often asked this: how are we supposed to reduce our energy consumption when our business model is based on ramping up production and therefore using more energy? Or the classic question: we’ve expanded our operations—how on earth are we supposed to save energy now?
This process involves calculating key performance indicators that take precisely these factors into account. These include the floor area of the heated building, the number of units produced, the thickness of the material processed, and many others. If this data is recorded accurately, it can be used to assess energy consumption.
And that gives me a baseline for my future consumption. If I improve energy efficiency, I can compare the new—and hopefully reduced—consumption with the same conditions in the past and see straight away how much I would have consumed under those conditions previously. The difference between these two figures is then my saving. This means that, despite increased energy consumption, I can reduce my relative consumption, and my certificate is not at risk either.
In practice, energy performance indicators in accordance with ISO 50006 therefore enable companies to systematically monitor energy efficiency and compare trends over longer periods. At the same time, they form an important basis for evaluating efficiency measures within an energy management system. If energy performance indicators are defined appropriately and evaluated regularly, a clear picture emerges of which processes are particularly energy-intensive and where specific opportunities for optimisation lie. This makes energy efficiency not only visible, but also manageable and strategically useful.
Measurement and verification in accordance with ISO 50015: providing robust evidence of savings
However, organisations implementing measures to improve energy efficiency also want to understand exactly how energy consumption is changing. This is precisely where ISO 50015 provides a structured methodological framework. The standard describes how energy savings can be systematically measured, analysed and verified. The main aim is to correctly assess changes in energy consumption and distinguish them from other influencing factors—such as fluctuations in production, weather conditions, or operating hours. Only in this way can it be reliably determined whether a measure has actually led to an improvement in energy efficiency.
In practice, this involves defining appropriate measurement frameworks, reference periods, and calculation methods. On this basis, organisations can document savings transparently and provide verifiable evidence of them. This is important not only for internal decision-making, but also for external verification, for example, in the context of funding schemes, energy audits, or energy management systems. ISO 50015 thus complements the use of energy performance indicators and ensures that efficiency measures are not only implemented but that their actual impact can also be objectively assessed.
Typical potential savings for businesses through energy management systems
An energy management system helps companies to systematically identify their biggest energy consumers and optimise them in a targeted manner. In practice, potential savings often lie in areas that initially receive little attention in day-to-day operations. These include, for example, inefficient compressed air systems, unregulated motors and pumps, unnecessary standby consumption, or poorly calibrated heating, ventilation, and air-conditioning systems. Organisational measures – such as optimised operating times for equipment or a more conscious approach to energy use in day-to-day work—can also yield noticeable results without requiring major immediate investment.
Furthermore, an energy management system provides transparency regarding energy flows within the company, enabling investments to be prioritised more effectively. For example, companies can identify which systems are particularly energy-intensive and where efficiency measures will pay for themselves particularly quickly following modernisation. Experience from numerous energy management projects shows that energy savings of several percent per year are a realistic target simply through structured analysis and continuous optimisation. This makes an energy management system a vital tool for permanently reducing energy costs and sustainably improving energy efficiency within the company.
Conclusion: How an energy management system helps businesses systematically reduce energy costs in the long term
An energy management system is far more than just a tool for documenting energy consumption. When implemented correctly, it provides transparency regarding energy flows, identifies opportunities for efficiency improvements, and enables systematic control of energy use within the organisation. Through the continuous improvement process based on the PDCA cycle, the use of appropriate energy indicators, and the structured measurement and verification of savings, companies can gradually increase their energy efficiency.
At the same time, an energy management system ensures that efficiency measures are not implemented in isolation but are integrated into the company’s long-term strategy. This makes it possible to reduce energy costs on a permanent basis, plan investments more effectively, and provide clear evidence of energy-related improvements. For many companies, structured energy management thus becomes a crucial component in using energy more economically and successfully meeting the growing demands for efficiency and sustainability.
You have now learnt about the benefits of an energy management system. Get in touch with us, and together we can work on improving energy efficiency within your organisation.
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