ISO 50001 is the international energy management system standard that enables organisations to measure their energy use systematically, identify their significant consumption points and continually improve their energy performance; the current version is ISO 50001:2018. What sets it apart from other management system standards is that it requires improvement to be proven numerically, at regular intervals, through energy performance indicators.
What does ISO 50001 cover?
The first edition was published in 2011 and the second in August 2018. The 2018 edition uses ISO's common management system structure: context, leadership, planning, support, operation, performance evaluation and improvement. This means it can be managed under the same roof as ISO 9001 and ISO 14001. Its scope covers all forms of energy, such as electricity, diesel, natural gas and steam. In Türkiye the standard is published as TS EN ISO 50001.
Certification is voluntary, but it is linked to the legal framework. Energy Efficiency Law No. 5627 (5627 sayılı Enerji Verimliliği Kanunu) requires industrial enterprises with an annual energy consumption of 1,000 TOE (tonnes of oil equivalent, TEP) or more, and commercial and service buildings with a total floor area of at least 20,000 m² or an annual consumption of 500 TOE or more, to appoint an energy manager. Industrial enterprises whose annual consumption exceeds 50,000 TOE must set up an energy management unit. ISO 50001 is the common way of tying these obligations into an orderly system.
Key concepts
| Concept | Meaning | Logistics example |
|---|---|---|
| Energy review | Analysis of consumption by source and point of use | Fleet fuel, warehouse lighting, cold room compressors |
| Significant energy use | An area that accounts for most of the consumption or has high improvement potential | Fuel consumption of the tractor unit fleet |
| Energy baseline | The reference period chosen for comparison | Average consumption in 2025 |
| Energy performance indicator | A measurable performance value | litres/100 km, litres/tonne-km, kWh/pallet |
| Relevant variable | A factor that affects consumption and is normalised in the calculation | Load weight, route gradient, outside temperature |
If relevant variables are not taken into account, the result is misleading: a cold room uses more energy in summer, and a loaded tractor unit burns more fuel than an empty one. The indicator is tracked with these differences normalised.
How is it implemented?
- The scope and boundaries are defined: which warehouses, which fleet, which offices.
- Top management approves the energy policy and an energy team is formed.
- Data is collected: fuel card records, meter readings, telematics data.
- The baseline and indicators are defined.
- Targets and an action plan are prepared: reducing idling, training based on driver behaviour analysis, monitoring tyre pressure, LED and motion-sensor lighting, shifting forklift charging to the night tariff.
- Energy performance becomes a purchasing criterion when buying new vehicles and equipment.
- Results are evaluated through internal audit and management review, followed by the certification audit.
A hypothetical calculation
A fleet of 100 tractor units covers 130,000 km per vehicle per year and consumes an average of 32 litres/100 km. A 3 percent improvement in consumption equals 0.96 litres/100 km. That means a diesel saving of roughly 1,250 litres per vehicle per year, or 125,000 litres across the fleet. ISO 50001 asks you to show whether this gain really comes from the actions taken, or from lighter loads and shorter routes.
Why does it matter?
Fuel is one of the largest cost items in road transport. Buyers are also increasingly asking their suppliers for emissions data; energy that is not measured means carbon that cannot be reported. Logistics-specific application examples are in the entry energy efficiency in logistics with ISO 50001.
How does Voltim Global support you?
Alongside its ISO 14001 environmental management system certificate, Voltim Global holds ISO 50001 certification. Customers using our transport or warehousing and distribution services can request this certificate and its validity details as part of their supplier evaluation.
Frequently Asked Questions
Is ISO 50001 certification mandatory in Türkiye?
What is the difference between ISO 50001 and ISO 14001?
Can a small haulage company implement ISO 50001?
Sources
- ISO 50001:2018 – Energy management systems – Requirements with guidance for use
- Energy Efficiency Law No. 5627 (5627 sayılı Enerji Verimliliği Kanunu)
- BSI – ISO 50001 Energy Management