Tesla Inc. TSLA is looking to expand production at its newly completed Gigafactories in Berlin and Shanghai for higher output capacities. However, the automaker might need a costly production break to upgrade the sites. Tesla plans to significantly increase production at both plants over the next two months. Per reports, both factories are expected to complete their expanded production lines by early August. Tesla’s Giga Shanghai has begun its pause on most Model Y production on Jul 1 and will take around two weeks to complete. Once done, the Shanghai factory will stop the Model 3 line for about 20…