I wonder when "fully operational" is. 3 months from now? 3 years from now?
They currently have multiple crews outside digging and pouring piers and building new sections of the building 24 hours a day.
Seven days a week.
They have roughly 14% of the building frame, roof, walls and interior built/finished, and they are now installing equipment, racks, robots, etc. inside.
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So multiply the size of the building by SEVEN, and it will be completed.
As far as the time-frame for completion of the building, certainly a lot longer than three months.
I think the shock of the number of reservations for the Model 3 blew Tesla Motors away, and they are responding the most expedient way that they physically and fiscally can.
Big buildings do not get built overnight.
HUGE Buildings take even longer to build.
And then all the equipment has to be purchased, installed and orchestrated to operate correctly.
By BOTH Tesla and Panasonic.
The two (parallel) paths of the Gigafactory and Model 3 need to converge so that BOTH ventures can be fully successful.
Without the need for the colossal quantities of batteries (for Model 3 initially and then eventually the Model S and Model X along with Power Wall and Power Pack), the Gigafactory makes no sense.
Without the source for leading-edge-technology lower-cost batteries, the Model 3 makes no sense.
And since THIS Gigafactory is NOT on the other side of the Pacific, only a train-ride over the mountains to Fremont delivers the batteries.
The goal is for the first 21-70 batteries to be manufactured//produced in the Gigafactory by the end of 2016, if not sooner.
So very shortly, great things will start happening out by Clark, just West of Reno.