Annex: METHODOLOGY FOR DETERMINING THE REDUCTION IN CO2 EMISSIONS DUE TO THE USE OF BATTERY CHARGING WEBASTO SOLAR ROOF - Commission Implementing Decision of 18 November 2014 on the approval of the battery charging Webasto solar 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) (2014/806/EU)