# Commission Implementing Decision (EU) 2016/1926 of 3 November 2016 on the approval of the battery-charging photovoltaic roof as an innovative technology for reducing CO2 emissions from passenger cars pursuant to Regulation (EC) No 443/2009 of the European Parliament and of the Council (Text with EEA relevance), Division: Formula 1

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

CCO2=SIR×UFIR×ηSS×mPP–SIR_STC×SCC×VPeηA×CFM×cosΦ−ΔCO2mWhere:
CCO2CO2 savings [g CO2/km]
SIR Yearly European mean solar irradiation [W/m2], which is 120 W/m2
UFIR Usage factor (shading effect) [-], which is 0,51
ηSS Efficiency of the photovoltaic system [%], which is 76 %
mPP–Measured average PV roof peak power output [W]
SIR_STC Global irradiation at Standard Test Conditions (STC) [W/m2], which is 1 000 W/m2
SCCSolar correction coefficient [-] as defined in Table 1. Total available storage capacity of the battery system or the SCC value is to be supplied by the vehicle manufacturer.
Table 1
Solar correction coefficient
The total storage capacity includes a mean usable storage capacity of the starter battery of 10 Ah (12 V). All values refer to a mean annual solar radiation of 120 W/m2, a shading share of 0,49 and a mean vehicle driving time of 1 hour per day at 750 W electric power requirement.
Total available storage capacity of (12 V) battery system/average PV roof peak power output [Ah/W]
0,10
0,20
0,30
0,40
0,50
0,60
> 0,666
Solar correction coefficient (SCC)
0,481
0,656
0,784
0,873
0,934
0,977
1
VPe Consumption of effective power [l/kWh] as defined in Table 2
Table 2
Consumption of effective power
Type of engine
Consumption of effective power (VPe)[l/kWh]
Petrol
0,264
Petrol Turbo
0,280
Diesel
0,220
ηA Efficiency of the alternator [%], which is 67 %;
CFConversion factor (l/100km) — (g CO2/km) [gCO2/l] as defined in Table 3
Table 3
Fuel conversion factor
Type of fuel
Conversion factor (l/100 km) — (g CO2/km) (CF)[gCO2/l]
Petrol
2 330
Diesel
2 640
MMean annual mileage [km/year] as defined in Table 4
Table 4
Mean annual mileage for M1 vehicles
Type of fuel
Mean annual mileage (M) [km/year]
Petrol
12 700
Diesel
17 000
ΦLengthwise inclination of the solar panel [°]. This value is to be supplied by the vehicle manufacturer
ΔCO2m CO2 correction coefficient due to the extra mass of the solar roof and, where applicable, the additional battery and other appliances needed specifically for the conversion of the solar energy into electricity and its storage [g CO2/km] as defined in Table 5.
Table 5
CO2 correction coefficient due to the extra mass
Type pf fuel
CO2 correction coefficient due to the extra mass (ΔCO2m)[g CO2/km]
Petrol
0,0277 · Δm
Diesel
0,0383 · Δm
In Table 5 Δm is the extra mass due to the installation of the photovoltaic system, composed by the PV roof and, where applicable, the additional battery and other appliances needed specifically for the conversion of the solar energy into electricity and its storage.
In particular, Δm is the positive difference between the mass of the photovoltaic system mass and the mass of a standard steel roof. The mass of a standard steel roof is assumed equal to 12 kg. In case the weight of the solar system is lower than 12 kg, no correction for the change in mass has to be made.

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Source: https://www.legislation.gov.uk/eudn/2016/1926/annex/division/4/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2016-1926/annex/division-4/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.