That makes little sense to me. Your analysis would result in the conclusion that charging an EV in France (90% carbon free electricity) causes the same amount

That makes little sense to me. Your analysis would result in the conclusion that charging an EV in France (90% carbon free electricity) causes the same amount of CO2 emissions as using one in South Africa (90% fossil fuel electricity). The expansion of EVs has coincided with a massive drop in coal electricity share and a massive increase in solar PV and wind share, globally. Assuming that expanding EVs are being powered by coal is odd to say the least. Especially given that (at least where I live) 70%+ of EV charging is done at home, mostly using off-peak electricity, which tends to have a much higher renewable share.