Elon Musk says the world needs about 100 "gigafactories", so we need 3500 GWh of battery making capacity per year. At that rate it would take 7 years to reach 2

Elon Musk says the world needs about 100 "gigafactories", so we need 3500 GWh of battery making capacity per year. At that rate it would take 7 years to reach 22 TWh of capacity.