Germany's EnEfG Data Center Law: PUE 1.5 Becomes Mandatory 1 July 2027
Germany now has one of the strictest data center PUE regulations in the world. Under the Energieeffizienzgesetz (EnEfG), the German Energy Efficiency Act, existing data centers must reach a Power Usage Effectiveness (PUE) of 1.5 or better by 1 July 2027, tightening to 1.3 by 1 July 2030. The law also requires something most operators have not built yet: continuous measurement of power and energy demand, not an annual estimate. This is not a voluntary target or an industry guideline. It is enacted federal law, and the first deadline is now about a year away.
Time remaining until the PUE 1.5 deadline (1 July 2027):
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What does EnEfG actually require?
Section 11 of the law sets different PUE thresholds depending on when a facility was commissioned.
Existing data centers (commissioned before 1 July 2026):
- PUE of 1.5 or better, from 1 July 2027
- PUE of 1.3 or better on annual average, from 1 July 2030
New data centers (commissioned from 1 July 2026 onward):
- PUE of 1.2 or better, within two years of commissioning
- A minimum share of reused energy: 10 percent from July 2026, 15 percent from July 2027, 20 percent from July 2028
The law applies to data centers with a non-redundant rated connection capacity of 300 kW or more. Below that threshold, EnEfG does not apply.
Continuous measurement requirement
Section 12 of the law does not stop at setting a target. It requires operators to establish an energy monitoring system to measure electrical power and energy demand for essential components continuously. That establishment obligation took effect 1 July 2025.
This is the part of the law that requires the facility to have ongoing instrumentation.
What continuous PUE monitoring looks like in practice
In Quicklime, AKCP's DCIM platform, PUE is computed as a live, continuously updated value fed by power meters on the facility and IT sides. Beside the power readings sit the readings that help explain any change in PUE. Using Thermal Map sensors, per-rack inlet and outlet temperatures with hot and cold aisle differentials.
AKCP has built monitoring hardware since 1981 and monitors more than 200,000 facilities, with sensors including the power and thermal instrumentation this law requires.
What to do if my facility is not compliant?
Where a facility is not yet close to 1.5, the next question is what to fix first. sensorCFD runs AI-assisted computational fluid dynamics simulations seeded by live sensor data, so a proposed change, containment, a CRAC set point, a rack move, can be tested against the facility as it actually operates before anyone touches hardware.
Frequently asked questions
Does EnEfG apply to my facility?
If your data center is in Germany and has a non-redundant rated connection capacity of 300 kW or more, yes. Below that threshold, the law does not currently apply.
What happens if I do not reach PUE 1.5 by the deadline?
We do not provide legal advice on enforcement or penalties. Consult the statute directly or legal counsel for your specific facility's exposure.
Is a once-a-year PUE calculation enough to comply?
The law's own language requires continuous measurement of power and energy demand as part of the mandated management system, not a periodic estimate. An annual calculation may satisfy general reporting elsewhere, but it does not match what EnEfG Section 12 describes.
Does this apply to facilities outside Germany?
No. EnEfG is German federal law. Facilities in other markets fall under different rules; see AKCP's coverage of EU-wide reporting requirements and other national regulations.
Can AKCP certify that my facility complies with EnEfG?
No. AKCP is not an auditor or a certification body. What AKCP provides is the continuous measurement infrastructure, live PUE, power metering, and thermal instrumentation, that the law requires operators to have in place, plus the airflow analysis to help close the gap to 1.5. Legal compliance determinations remain the operator's responsibility.
See where your facility stands today
The fastest way to find out how far a facility is from the 2027 threshold is to look at its actual numbers. AKCP runs a free PUE Health Check: a 15-minute session on your facility's PUE drivers, where the energy goes, and what would close the gap before the deadline.
