Energy Audit according to EN 16247-1

No formal testing or certification procedure is prescribed

Re-Audit until December 2019

The energy audit DIN EN 16247-1 has been mandatory for affected companies since 2015.

The company must repeat the audit every four years.

If there is no audit evidence, sensitive fines of up to €50,000 may be imposed.

All companies, both manufacturing and nonmanufacturing (such as service providers, retailers, banks, health care, etc.), are affected.

Who has to do what?

The company has to:

  1. Carry out energy audits according to EN 16247-1.
  2. The audits must be carried out by qualified technical experts.
  3. Audits must be repeated every four years.


have introduced a certified energy management system according to DIN EN ISO 50001 or a validated environmental management system according to EMAS.

Who is not affected?
SME are companies according to 2003/361/EG, paragraph 2: The classification of an enterprise as an SME (micro, small or medium-sized) is based on the number of employees and either turnover or balance sheet total.

Size category Number of employees: Annual work unit (AWU) Annual turnover Or annual balance sheet total
Medium-sized company < 250 < or equal 50 M EUR < or equal 43 M EUR
small businesses < 50 < or equal 10 M EUR < or equal 10 M EUR
micro-enterprises < 10 < or equal 2 M EUR < or equal 2 M EUR

These values apply only to fully independent companies (or, in the case of shareholdings, less than 25 % of the capital or voting rights).

Who may carry out the energy audits according to EN 16247-1?
According to § 8a of the Energy Services Act (EDL-G), the energy audit must be carried out independently of internal company personnel or externally commissioned personnel.

How to verify the audit / requirements?
The proof that an energy audit has been carried out in accordance with EN 16247-1 is provided by confirmation from an energy auditor.
Otherwise, proof can be provided by an ISO 50001 certificate or an EMAS registration.
The Federal Office of Economics and Export Control will carry out spot checks for this purpose. No formal testing or certification procedure is prescribed.

DIN EN 16247-1 and ISO 50001 – commonalities and differences

EnMS according to ISO 50001 energy audit according to EN 16247
Target group Suitable for all organizations and company sizes. Suitable for all organizations as an introduction.

For SMEs, as evidence of peak compensation.

Content Requirements for the introduction, implementation, maintenance and improvement of an EnMS. Guide to conducting an energy assessment starting with the contractual agreement with the energy auditor on the conduct and scope of reporting.
Management system Integrated management system based on the continuous improvement process known as the PDCA cycle. No management system with a continuous improvement process.
Energetic evaluation The energetic evaluation is an essential part of ISO 50001.

ISO 50001 specifies further requirements that are taken into account in all processes of the organization.

Systematic investigation and analysis of the energy input and the energy consumption and determination of the saving potentials
(= energetic evaluation).
Scope and application area of the examination Organization defines the scope and limits of the EnMS.

All types of energy and energy consumers, all company processes.

The representativeness of the energy audit is assumed in any case if at least 90 % of the total energy consumption of a company is covered by the energy audit on the basis of an overall recording of energy consumption.
Prospects of success Commitment of top management, involvement of all employees, holistic management system. Depending on the scope of the energy audit, depending on the individual commitment of the operational managers.
Potential for savings Implementation of a self-supporting CIP process that continuously improves energy efficiency.

Permanent and continuous development of energy efficiency.

Identification of savings potentials with information on which investments are profitable in which time period.

Rather individual measures, possibly only a single impulse.

conformity check External certification audit by an accredited certifier. Energy audit is not an audit in the sense of an internal audit according to ISO 50001 and differs considerably from the external audit of ISO 50001 by an accredited certifier.

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