The Gigafactory that electric car giant “Tesla” has been building is finally set to open on July 29, 2016. Several VIPs have already been invited for the grand event, with special attention to those who won the car maker’s Model S referral program where individuals referred 5 or more buyers to purchase the Model S. According to The Verge though, no invitation has been extended to any media outlet as of yet, though that can change before the opening day.

A piece by Fortune covering the announcement points out that the Gigafactory, which is located in Reno, Nevada is still technically only 14 percent complete. Even so, the factory is already producing batteries and selling them to other companies and businesses in order to store the energy that they get via solar panels. “Tesla” has also been hosting events in the factory over the last several months, with one of the most notable events being the talks with legislators about the future of solar energy.

The factory is going to be 5.8 million square feet once it is done and will cost over $5 billion in order to complete. It is meant to produce the largest volume of lithium-ion batteries in any factory and will be the main source of batteries and parts for “Tesla’s” lineup of vehicles in order to make them cheaper.

This is a must for the car maker, particularly with the increased production volume that CEO Elon Musk has set as well as the number of pre-ordered Model 3 vehicles. Thanks to the effect of large-scale productions, the cost of every battery will be cheaper, which will then bring down the cost of every vehicle that the company makes.

“Tesla” also recently raised $1.7 in funding that will go to accelerating the product of Mode 3s, which last month stood at over 400,000 pre-orders.