The average efficiency of European Power production (eta)
Annex VII of the RES Directive defines the calculation for the RES contribution for heating.
ERES = Qusable * (1 – 1/SPF)
Qusable = the estimated total usable heat delivered by heat pumps fulfilling the criteria referred to in Article 5(4), implemented as follows:
- Only heat pumps for which SPF > 1,15 * 1/η shall be taken into account,
- SPF = the estimated average seasonal performance factor for those heat pumps,
- η is the ratio between total gross production of electricity and the primary energy consumption for electricity production and shall be calculated as an EU average based on Eurostat data.
Eurostat is publishing the most recent value for eta on its website (click on this link to get the Eurostat table with the full calculation).
The guidelines for the calculation method in full detail can be found here (click on this link).