Under those conditions, converting all vehicles to electric would increase net electricity usage by ~20%. (Better than 100%!) Eliminating gasoline refining wou

Under those conditions, converting all vehicles to electric would increase net electricity usage by ~20%. (Better than 100%!) Eliminating gasoline refining would reduce the needed electricity by ~850 billion kWh / year, and the improved efficiency (ignoring charge/discharge cycle efficiency) would reduce the net energy to ~594 billion kWh / year - or 54 million average home PV installations. Quick googling shows that it will be about 10% higher for charging losses.