ISO 50001 data centre: energy managed through indicators and audits
An ISO 50001 data centre tracks the energy it consumes through a management system audited by an independent body. At Thésée Datacenter, the British Standards Institution (BSI) certifies this system to ISO 50001:2018. The certificate covers both of our sites in the Yvelines. It is part of our wider approach to delivering a secure datacenter.
A certificate valid until March 2027 across both of our sites
The certificate states the certification body, the scope and the sites covered. The certification body also allows it to be verified online.
BSI provides a certificate verification service for the certificates it issues. This service makes it possible to confirm that the document is valid.
How an ISO 50001 data centre improves its energy performance
The standard applies the plan, do, check, act cycle to energy. It sets no threshold: it provides a framework for a method and for continual improvement.
- The energy review: it identifies the significant uses, in particular cooling and the electrical chain.
- The energy baseline: it defines the starting point used to track improvements.
- The energy performance indicators (EnPIs): the company selects them, then compares them against the baseline.
- The objectives and action plans: they translate the energy policy into planned actions.
- The internal audit and management review: they check the progress of the system against a defined schedule.
Design PUE or measured PUE: reading a data centre's indicator correctly
PUE (Power Usage Effectiveness) compares the site's total energy with that of the IT equipment. The closer it gets to 1.0, the less the infrastructure spends on cooling and powering the servers. Design offices establish the design PUE on paper, at full load. The measured PUE varies with room occupancy and the weather.
The Aubergenville campus (TDC01) reports a design PUE of 1.2. According to our 2025 corporate social responsibility (CSR) report, its design targets 35% less energy than existing data centres. Thésée Datacenter has joined the Climate Neutral Data Centre Pact (CNDCP). This framework sets a target of a PUE of 1.3 and 0.4 litres of water per kWh. Always ask which value a hosting provider publishes: design or measured.
Practical levers to limit the energy consumed by your equipment
Our carbon footprint assessment measures our emissions and guides our annual milestones. Our CSR policy sets out our climate commitments and our reduction targets.
Indicators ready for European energy reporting
Directive (EU) 2023/1791 makes energy reporting mandatory for data centres of at least 500 kW. Delegated Regulation (EU) 2024/1364 sets out the indicators required. An ISO 50001 data centre already organises the collection of this data. The standard remains voluntary, whereas this reporting is a requirement of European law.
View our ISO 50001 certificate and our carbon footprint assessment.
Do you have a question about the energy performance of your future rack? Contact our team.
See also: ISO 27001 data centre · PCI DSS data centre
Frequently asked questions about ISO 50001 certification
Find the answers to the most common questions about ISO 50001, how long it stays valid and how it relates to energy indicators.
Is ISO 50001 certification mandatory for a data centre?
No, it remains voluntary. European law does, however, require energy reporting for data centres of at least 500 kW, without imposing certification.
How long is an ISO 50001 certificate valid?
A certification cycle runs for three years and includes interim surveillance audits. The Thésée Datacenter cycle runs from 29/03/2024 to 28/03/2027.
How are ISO 50001 and PUE related?
ISO 50001 requires energy performance indicators, without specifying any particular one. An ISO 50001 data centre often includes PUE in its monitoring. Above all, the standard checks that indicators are measured and improved.
What is the difference between ISO 50001 and ISO 14001?
ISO 50001 focuses on energy performance. ISO 14001 covers all environmental impacts, including waste and water. Thésée Datacenter is preparing its ISO 14001 certification.