I've heard somewhere (possibly in a BBC TV report) that batteries are passed through a hole in the floor from Tesla to Panasonic enclaves because neither compan

I've heard somewhere (possibly in a BBC TV report) that batteries are passed through a hole in the floor from Tesla to Panasonic enclaves because neither company wants the other to know fully about the processes required to finish the final product. Hence the joint venture on one site. edit: ok, the article[0] doesn't mention secrecy as the motive but yes a hole is involved. And the motive for a single site is to reduce transportation costs. [0]http://www.bbc.co.uk/news/technology-36893104 http://www.bbc.co.uk/news/technology-36893104