Energy diagnosis

With Legislative Decree 102 of 4 July 2014, Italy implemented the Directive 2012/27/EU on Energy Efficiency: the national objective is the reduction by 2020 of 20 million Tonnes of Oil Equivalent (TOE) of primary energy consumption. According to the Decree, organizations are required to carry out energy audits and are encouraged to adopt Energy Management Systems according to the ISO 50001 standard.


With Legislative Decree No. 102 of 4 July 2014 (G.U. General Series No. 165 of 18/07/2014) Italy transposed Directive 2012/27/EU on Energy Efficiency.

The art. 8 of Legislative Decree 102 defines the subjects required to carry out energy audits by 5 December 2015 (and then every 4 years) at their production sites:

Large enterprises (paragraph 1);
Energy-intensive companies (paragraph 3).


According to MISE Clarifications – November 2016, large companies mean organizations whose conditions to be satisfied are:

  • 250 employees regardless of turnover and a turnover exceeding 50 million euros and 43 million in total annual balance sheet.

Condition checked in the previous two years.



The new definition of an energy-intensive company requires that not only the absolute consumption of energy vectors be considered, but also the incidence of the cost of energy on its overall turnover.

The provision establishes that companies with a total cost of energy exceeding 3% of turnover are entitled to concessions on excise duties.
On the other hand, the electricity intensity index has been set at 2%, i.e. the ratio between electricity costs and turnover beyond which companies will be able to enjoy reductions on system charges in their bills (in particular those for RES). And the higher this ratio, the greater the benefits. The threshold of 2.4 GWh per year of volumes consumed remains valid, below which companies will not be entitled to relief.

Condition verified the previous year.


SITES TO BE SUBJECTED TO DIAGNOSIS (ART. 8 Legislative Decree 102/2014)

Production site:

A production site is a geographically defined location where a good is produced and/or a service is provided, within which the use of energy is under the control of the company.

Company Multisite:

The company, made up of n sites all belonging to a single VAT number, or the group of companies that present a single consolidated financial statement, or the group of associated or connected companies, has the option of performing the Diagnosis only on a group significant of their sites.

Rules to be applied for the identification of the significant cluster | Industrial sector
Rules to be applied for the identification of the significant cluster | Service industry


The Energy Diagnosis is a systematic investigation of the energy uses of the site, building or system being analysed, with the aim of identifying, among the energy flows, the opportunities for reducing energy costs through management interventions , plant engineering and structural.

The Energy Diagnosis is the tool for analyzing the energy management framework of an activity (industrial, services, primary and tertiary) and represents a systematic assessment of how energy is used from the point where it is acquired to its point of use the final. ENEA has deemed it appropriate to set up an operating procedure relating to Energy Diagnoses which would allow:

to uniform the management and data entry by operators;
to ensure compliance with Annex 2 of Legislative Decree 102/2014 (a requirement that is met if the diagnosis complies with the minimum criteria contained in the UNI CEI EN 16247 technical standards, parts 1 to 4);
to achieve a more organic transposition and processing of data by ENEA.



Companies with an EMAS, ISO 50001 or EN ISO 14001 voluntary management system, including an energy audit compliant with the requirements of Annex 2 of Legislative Decree no. 102/2014.



The report must contain the following paragraphs:

  1. Note on who drafted the energy audit.
  2. Company data
  3. Production site data
  4. Reference period of the diagnosis
  5. Energy consumption
  6. Raw material
  7. Productive process
  8. Products
  9. Reference energy indicators
  10. Information on the data collection method
  11. Description of the implementation of the monitoring strategy.
  12. Energy models
  13. Identification of possible interventions
  14. Measurement plans to be implemented
  15. Summary table of the interventions identified



The next deadline to submit the energy audit report is December 5, 2019.



Obliged companies that do not carry out an energy audit are subject to a pecuniary administrative fine ranging from 4,000 to 40,000 euros. When the diagnosis is not carried out in accordance with the provisions of article 8, an administrative fine ranging from 2,000 to 20,000 euros is applied.

The sanction does not exempt from carrying out the diagnosis.



ECO Next offers a structured service in phases that was created to provide organizations with:

  • Definition of the objectives of the analysis with the customer
  • Carrying out a field inspection in which an in-depth campaign of analysis and monitoring of the most energy-intensive utilities will be carried out
  • Analysis of the data acquired in the field, estimate of the distribution of consumption among the various customer cost centers and preparation of an energy model of the system being analyzed
  • Proposal of interventions for the reduction of energy costs aimed at reducing waste, malfunctions and anomalies encountered;
  • Presentation of results.

1. Monitoring campaign

It is strongly recommended to carry out a campaign lasting at least 3 weeks on the electrical panels suitably identified in the Kick Off Meeting phase, in which the main utilities are present for the purposes of the minimum fulfillment required by ENEA. The monitoring tools to be installed on the Sites will be provided and the installation and uninstallation will be the responsibility of the Client, with the support of our technicians. The network analyzers will be installed near an electrical panel and will monitor the electrical loads connected to it.

2. Energy Diagnosis

The Energy Diagnosis technical proposal consists of 6 consequential phases following the Initial Meeting:

  1. Data Collection
  2. Data processing
  3. Field inspection
  4. Reconstruction of consumption by “Energy Cost Center”
  5. Identification of Criticalities and Opportunities
  6. Elaborated drafting



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