# Commission Implementing Decision (EU) 2020/174 of 6 February 2020 on the approval of the technology used in 12 Volt efficient alternators for use in certain passenger cars and light commercial vehicles as an innovative technology pursuant to Regulation (EU) 2019/631 of the European Parliament and of the Council (Text with EEA relevance), Division 8: STATISTICAL SIGNIFICANCE

Extent: E+W+S+N.I.

It has to be demonstrated for each type, variant and version of a vehicle fitted with the efficient alternator that the error in the CO2 savings calculated in accordance with Formula 9 is not greater than the difference between the total CO2 savings and the minimum savings threshold specified in Article 9(1) of Regulation (EU) No 725/2011 (see Formula 10).
Where:
MT Minimum threshold [gCO2/km]
Total CO2 saving [gCO2/km]
Standard deviation of the total CO2 saving [gCO2/km]
CO2 correction coefficient due to the positive mass difference between the efficient alternator and the baseline alternator. shall be calculated following Table 4:
Table 4
CO2 correction coefficient due to the extra mass
Petrol () [g CO2/km kg]
0,0277•Δm
Diesel () [g CO2/km kg]
0,0383•Δm
In Table 4, ‘Δm’ is the extra mass due to the installation of the efficient alternator. It is the positive difference between the mass of the efficient alternator and the mass of baseline alternator. The mass of the baseline alternator is 7 kg. On the evaluation of the extra mass the manufacturer must hand over verified documentation to the type-approval authority.

---
Source: https://www.legislation.gov.uk/eudn/2020/174/annex/division/8 (the official version)
Page: https://openlegislation.uk/eu-decision-2020-174/annex/division-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.