contenuto nascosto per l'accessibilita'
Skip Ribbon Commands
Skip to main content
HomeFeed-in schemeSolar thermodynamic

Solar thermodynamic

Thermodynamic solar

feed-in scheme, feed-in tariff, technical requirements, hybrid plants, feed-in tariffs, solar fraction, cumulability, grants

About

The feed-in tariff support scheme for solar thermodynamic plants is regulated by the Ministerial Decree of 11 Apr. 2008, as subsequently amended by the Ministerial Decree of 6 Jul. 2012. Under the scheme, electricity generation by solar thermodynamic plants is supported through feed-in tariffs over a period of 25 years. The tariffs remain constant throughout the support period.

In the case of hybrid plants, i.e. fed by both solar and other sources, feed-in tariffs only apply to electricity generated from the solar source.

 

Technical requirements of plants

Under the Ministerial Decree of 11 Apr. 2008, as amended by the Ministerial Decree of 6 Jul. 2012, plants eligible for support are new solar thermodynamic plants (including hybrid ones) commissioned after 18 Jul. 2008 (date of AEEG’s Decision 95/08, implementing the above legislation) and meeting the following requirements:

  • they do not use substances and preparations classified as very toxic, toxic and harmful under Directives 67/548/EEC and 1999/45/EC, as subsequently amended (plants located in industrial sites are not subject to this requirement);
  • plants commissioned until 31 Dec. 2012, equipped with a thermal storage system having a nominal capacity of at least 1.5 kWh/m2 and a capturing surface of more than 2,500 m2;
  • plants commissioned after 31 Dec. 2012 must meet the requirements shown in the following table: 
     
Capturing surface (m2)​ ​Nominal storage capacity per m2 of capturing surface (kWh/m2)
​>50,000

>1.5​

10,000 < S ≤ 50,000​
​>0.4
≤ 10,000​
Not applicable​
  • they must be connected to the power grid (or to small isolated grids) and each plant must have a single point of connection.

    Additionally, the decrees specify:

  • a maximum limit of supportable capacity (including the solar fraction for hybrid plants) equal to 2,500,000 m2 of capturing surface;
  • tariffs based on the fraction of electricity from non-solar sources needed to integrate solar generation and, beginning on 31 Dec. 2012, tariffs related to the value of the capturing surface (2,500 m2 threshold).

 

Feed-in tariffs

Feed-in tariffs for solar thermodynamic plants are variable, depending on:

  • the non-solar fraction, i.e. the percentage of electricity from non-solar sources generated every year;
  • the capturing surface, i.e. the sum of the surface areas of all the solar collectors making part of the solar thermodynamic (or hybrid) plant.

The support period is equal to 25 years, beginning on the date of commissioning of the plant.
The incentives are thus awarded only for electricity generated by the plant from the solar source; this electricity is measured by a metering system placed after the generators of the plant. Feed-in tariffs add to revenues from the sale of electricity generated and injected into the grid.

Plants commissioned until 31 Dec. 2012 are eligible for the following feed-in tariffs:

 

 

Non-solar fraction
Tariff (€/kWh)​
below 0.15​ ​0.28
0.15 to 0.50​ 0.25​
​above 0.50 ​0.22

 

NB: the non-solar fraction (Fint) of a solar thermodynamic plant is defined as the share of net electricity generated from non-solar sources, expressed by the following relation: Fint = 1 – Ps/Pne, where Ps is the net electricity generated from the solar source and Pne is the net electricity generated by the plant.


Plants commissioned in the period from 31 Dec. 2012 to 31 Dec. 2015 and having a capturing surface of up to 2,500 m2 are eligible for the following feed-in tariffs:

 

 

Non-solar fraction
Tariff (€/kWh)​
below 0.15​ ​0.36
0.15 to 0.50​ 0.32​
​above 0.50 ​0.30

 

NB: the non-solar fraction (Fint) of a solar thermodynamic plant is defined as the share of net electricity generated from non-solar sources, expressed by the following relation: Fint = 1 – Ps/Pne, where Ps is the net electricity generated from the solar source and Pne is the net electricity generated by the plant.


Plants commissioned in the period from 31 Dec. 2012 to 31 Dec. 2015 and having a capturing surface exceeding 2,500 m2 are eligible for the following feed-in tariffs:

 

Non-solar fraction
Tariff (€/kWh)​
below 0.15​ ​0.32
0.15 to 0.50​ 0.30​
​above 0.50 ​0.27

NB: the non-solar fraction (Fint) of a solar thermodynamic plant is defined as the share of net electricity generated from non-solar sources, expressed by the following relation: Fint = 1 – Ps/Pne, where Ps is the net electricity generated from the solar source and Pne is the net electricity generated by the plant.

The values of the tariffs refer to plants commissioned in the period from 18 Jul. 2008 (date of Decision 95/08 adopted by “Autorità per l’energia elettrica e il gas” - AEEG, the Italian electricity & gas regulator - in compliance with the Ministerial Decree of 11 Apr. 2008) to 31 December 2015.

For plants commissioned in the period from 1 Jan. 2016 and 31 Dec. 2016, the tariffs for the year 2015 will be decreased by 5%. For plants commissioned in the period from 1 Jan. 2017 and 31 Dec. 2017, the tariffs for the year 2015 will be decreased by another 5% (rounded to the third decimal figure).

Failing further decrees, the tariffs set by the Ministerial Decree of 6 Jul. 2012 for plants commissioned in 2017 will continue to apply for the years following 2017.

GSE will pay the incentive in advance and make adjustments at the end of each solar year based on the solar fraction of electricity actually generated in the same year.

 

Cumulability with other forms of support

Plants commissioned after 31 Dec. 2012 are not subject to the cumulability provisions of art. 8 of the Decree of 11 Apr. 2008, but to those of art. 26 of Legislative Decree no. 28 of 2011.

In particular, feed-in incentives may be cumulated with:

a) access to guarantee and revolving funds;

b) other forms of public support not exceeding: 40% of the investment cost for plants with an electrical capacity of up to 200 kW; 30% for plants with a capacity of up to 1 MW; and 20% for plants with a capacity of up to 10 MW;

c) exemption from company tax for investments in machinery and equipment for plants with a capacity of over 10 MW.

In the case of a hybrid solar thermodynamic plant, whose non-solar source is another renewable source, feed-in tariffs may be cumulated with incentives applicable to electricity generation from renewables and calculated on basis of the non-solar renewable fraction (green certificates, all-inclusive feed-in tariff).

This page was last updated on 05/03/2013