Tesla plans to double the size of its factory near Berlin, aiming to produce up to one million electric cars a year. This could make it the largest auto manufacturing facility in Germany. The company has applied for approval to expand its existing factory in Brandenburg to increase production capacity for vehicles and batteries. Tesla's Model Y and Model 3 were the bestselling all-electric vehicles in Europe in the first quarter, outpacing Volkswagen's ID.3 and ID.4. However, the expansion plan could face resistance due to environmental concerns.