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Parliamentary questions
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1 February 2017
Answer given by Mr Arias Cañete on behalf of the Commission
Question reference: E-008892/2016

In the context of the review of Directive 2012/27/EU on energy efficiency, the Commission has proposed a new value of the coefficient used for electricity savings, normally known as Primary Energy Factor (PEF) for electricity generation.

The proposed lower value — 2.0 rather than 2.5 — reflects the growing role of renewable sources of energy (RES) in electricity generation.

To calculate the new PEF value the Commission checked the main methods for defining the primary energy content of every energy source that is used to generate electricity. The calculation method that the Commission chose valorises non-combustible RES by assuming full conversion efficiency (100%), i.e. that one unit of primary energy from e.g. Wind Energy and Solar Photovoltaic gives one unit of electricity, without any loss (while e.g. one unit of primary energy from fossil fuels gives typically 0.4 unit of electricity and one unit of primary energy from nuclear gives 0.33 unit of electricity).

Therefore the PEF value that the Commission applies for electricity generated from non-combustible RES is 1 (while the equivalent value for fossil fuels is minimum 2.5 and for nuclear 3).

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