Tesla's sprawling Gigafactory has yet to kick into full swing, but that isn't stopping the electric car maker from giving its plant an official debut. It's inviting its biggest fans (including those who referred buyers) to a grand opening for the Gigafactory on July 29th, even though the Nevada facility is still well away from being finished. There's no mention of what's on the itinerary, although it's reasonable to suspect that this could be the first truly revealing, officially sanctioned peek inside the factory. Motor Trend got a tour in April, but mainly showed the outside.