From time to time we hear claims that the energy to produce the batteries in electric vehicles is similar to several years of driving them. It will therefore be interesting to see if these numbers add up when the production hits 35 GWh per year. Let us see what we get by doing a back of the envelope calculation when we suppose that battery production consumes just one year of driving. The 35 GWH is enough to produce 350 000 cars with 100 KWh battery packs. If a typical car use 0.2 KWh per km and drives 15 000 km/year. We get an annual power usage of 3000 KWh (=3 MWh) per car. Multiplying that with 350 000 cars gives 1 050 000 MWh (1050 GWh) per year. I would be surprised if the factory uses that much.