Division 2 The following input data for the calculation of CO2 savings potential are to be used:

• mean solar irradiation P_SR specified in Chapter 5.7.1 of the Technical Guidelines^f1, i.e. 120 W/m²,

• usage factor/shading effect UF_IR specified in Chapter 5.4.2 of the Technical Guidelines, i.e. 0,51,

• efficiency of the solar system η_SS specified in Chapter 5.1.3 of the Technical Guidelines, i.e. 0,76,

• solar correction coefficient SCC specified in Table 1 and in Chapter 5.7.2 of the Technical Guidelines,

  Table 1

  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 (12 V)/ PV peak power (Ah/Wp)f2	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

• consumption of effective power for petrol V_Pe-P and diesel-fuelled vehicles V_Pe-D specified in Table 2 and in Chapter 5.1.1 of the Technical Guidelines,

  Table 2

  Type of engine	Consumption of effective power VPe (l/kWh)
  Petrol (VPe-P)	0,264
  Diesel (VPe-D)	0,22

• efficiency of the alternator η_Α , specified in Chapter 5.1.2 of the Technical Guidelines, i.e. 0,67.

For the conversion factors CF the data in Table 3 is to be used:

For the mean annual mileage the data in Table 4 is to be used (km/year):

With these input data the CO₂ savings for a petrol-fuelled vehicle are to be calculated by Formula (2).

The difference in mass between the baseline vehicle and the eco-innovation vehicle due to the installation of the solar roof and where relevant, the extra battery, is to be taken into account by applying the mass correction coefficient^f3. The baseline vehicle is to be a vehicle variant that in all aspects is identical to the eco-innovation vehicle with the exception of the solar roof and, where applicable, without the additional battery and other appliances needed specifically for the conversion of the solar energy into electricity and its storage.

For a new version of a vehicle in which the solar roof panel is installed the baseline vehicle is to be specified as follows: it is the vehicle in which the solar roof panel is disconnected and the change in mass due to the installation of the solar roof is taken into account. In case the solar roof panel is made of glass a correction for the change in mass is to be introduced, i.e. an extra mass of 3,4 kg. In case the solar roof panel is made of low weight synthetic material no correction for the change in mass has to be made. On this change of mass the manufacturer must hand over verified documentation to the Type-Approval Authority.

Formula (2):

$$C_{{\mathrm{CO}}_2}=P_{\mathrm{SR}}\times {\mathrm{UF}}_{\mathrm{IR}}\times {\eta }_{\mathrm{SS}}\times P_P\times \mathrm{SCC}\times \frac{V_{\mathrm{Pe}-P}}{{\eta }_A}\times \frac{{\mathrm{CF}}_P}{M_P}\times \mathrm{cos\Phi }-{\mathrm{\Delta CO}}_{\mathrm{2mP}}$$

Where:

C_{CO 2}

CO₂ savings (g CO₂/km);

P_SR

Mean solar irradiation (W/m²);

UF_IR

Usage factor/shading effect (-);

η_SS

Efficiency of the solar system (-);

P_P

Peak power output (Wp);

SCC

Solar correction coefficient (-);

V_{Pe – P}

Consumption of effective power for petrol vehicles (l/kWh);

η_A

Efficiency of the alternator (-);

CF_P

Conversion factor for petrol vehicles (100 g/l);

M_P

Mean annual mileage for petrol vehicles (km/year);

Φ

Lengthwise inclination of the solar panel [^o];

ΔCO_2mP

CO₂ correction coefficient due to the change in mass following the installation 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 for petrol vehicles (g CO₂/km).

The CO₂ savings for diesel-fuelled vehicles are to be calculated by Formula (3).

The difference in mass between the baseline vehicle and the eco-innovation vehicle due to the installation of solar roof and, where relevant, the extra battery is to be taken into account by applying the mass correction coefficient. The baseline vehicle is to be a vehicle variant that in all aspects is identical to the eco-innovation vehicle with the exception of the solar roof and, where applicable, without the additional battery and other appliances needed specifically for the conversion of the solar energy into electricity and its storage.

For a new version of a vehicle in which the solar roof panel is installed the baseline vehicle is to be specified as follows: it is the vehicle in which the solar roof panel is disconnected, and the change in mass due to the installation of the solar roof is taken into account. In case the solar roof panel is made of glass a correction for the change in mass is to be introduced, i.e. an extra mass of 3,4 kg. In case the solar roof panel is made of low weight synthetic material no correction for the change in mass has to be made. On this change of mass the manufacturer must hand over verified documentation to the Type-Approval Authority.

Formula (3):

$$C_{{\mathrm{CO}}_2}=P_{\mathrm{SR}}\times {\mathrm{UF}}_{\mathrm{IR}}\times {\eta }_{\mathrm{SS}}\times P_P\times \mathrm{SCC}\times \frac{V_{\mathrm{Pe}-D}}{{\eta }_A}\times \frac{{\mathrm{CF}}_D}{M_D}\times \mathrm{cos\Phi }-{\mathrm{\Delta CO}}_{\mathrm{2mD}}$$

Where:

V_{Pe – D}

Consumption of effective power for diesel vehicles (l/kWh);

CF_D

Conversion factor for diesel vehicles (100 g/l);

M_D

Mean annual mileage for diesel vehicles (km/year);

ΔCO_2mD

CO₂ correction coefficient due to the change in mass following the installation 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 for diesel vehicles (g CO₂/km).

The CO₂ correction coefficient due to the change in mass is to be calculated by Formulas (4) and (5).

Formula (4):

${\mathrm{\Delta CO}}_{\mathrm{2mP}}=\mathrm{0,0277}\times \mathrm{\Delta m}$

for a petrol-fuelled vehicle

and

Formula (5):

${\mathrm{\Delta CO}}_{\mathrm{2mD}}=\mathrm{0,0383}\times \mathrm{\Delta m}$

for a diesel-fuelled vehicle

Where:

Δm

Change in mass due to the installation 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 (e.g. 5 kg).