An electric car powering on otherwise wasted renewable energy does not have negative CO2 emissions, just zero. Germany had 134 hours of negative power prices la

An electric car powering on otherwise wasted renewable energy does not have negative CO2 emissions, just zero. Germany had 134 hours of negative power prices last year, and this would indeed mean that a marginal electric car added to the grid would be proportionally powered by renewables - 1.5% in 2018. In that sense, my argument of 0% is too extreme especially as the number grows, but it is still a negligible amount even in Germany today, which is significantly ahead of most countries on the renewable transition. It is fair to count renewable energy that could not be produced without the assistance of BEVs, via demand dispatch or battery to grid transfers. And the full amount of this energy should be counted, not just its share of contribution to the grid.