A far-left activist group took responsibility for the fire, which left the plant without power for...
Elon Musk - and his son X AE A-XII - have visited a Tesla plant in Berlin that was targeted by a suspected arson attack earlier this month.
A nearby electricity pylon was set on fire, leaving the facility without power for nearly a week.
It said it targeted the site because of the amount of resources and labour it uses.
Mr Musk told reporters at the site he wanted to push ahead with plans to expand the plant, despite the fire.