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Argonne assumes the batteries are produced with renewables AND they assume EVs are going to be charged over the day, when most of the renewable energy is "present". Most BEVs are charged over night, where only Hydro or Geothermal makes power. Meaning, the Co2 footprint grows exponentially, because at night most of the power is made with fossile fuels - a kWh easily can have a rucksack of over 700 gr/kWh of Co2. But hey, what's a few assumptions here or there in favour of either side, huh? Oh and go talk to China about them producing the batteries "environment friendly". Just because something uses less Co2 doesn't mean it's cleaner. A few ppm more Co2 in the Atmosphere is bad for the Climate, sure, but a few ppm more Mercury in natural habitats, rivers and lakes? Pff, who cares!
A recent study from the Association of German Engineers did factor in that most EVs are charged over night - even after 130k Miles (~ 200k km), a Golf TDI has roughly a 33 Ton Co2 rucksack, where an EV produced with renewables (ID.3) had 36 Tons.
"Most BEVs are charged over night, where only Hydro or Geothermal makes power"
Maybe in Iceland; anywhere with wind and nuclear power, this really is not the case.
And in most areas, how much share have nuclear and wind? Somewhere around 30-40% combined on average
About 30% in Europe/US; half that in China.
Electricity consumption drops sharply during the night - when wind power typically peaks. There are power companies that offer substantially cheaper rates at night for charging EVs for this very reason.