We took a tour of the factory where Tesla is building its new Model X SUV

Over the past decade Tesla has grown from ambitious upstart into a global leader in electric vehicles. Its Model S sedan has set a performance benchmark for competitors looking to enter the segment, and today it will sell its first Model X sports utility vehicle.

Both cars are made in a factory in Fremont, California. As you might expect from an Elon Musk-run company, Tesla’s factory is one of the most advanced automotive production facility in the world. It’s equipped with more than a hundred robots.

This week, Business Insider made our way over to Silicon Valley and took a tour of the Tesla Factory. Tonight we’ll be at the delivery of the first Model X, so check back for coverage. Here’s the factory:

The Tesla Factory is situated on 370 acres of land in Fremont, California.

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The NUMMI joint venture ended 2009 which allowed Tesla to swoop in and purchase the plant in 2010.

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Believe it or not, this is the last remaining major car factory in the state of California.

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As we pull up to the Tesla Factory, we are greeted by a row of the company's Model S electric sedans having their batteries topped off at SuperCharger stations.

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Nearby, brand new Model S cars sit outside the Customer Delivery center.

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Eventually, we make our way inside the massive production facility. It occupies 5.3 million sq. ft. of manufacturing space.

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How do people get around the massive factory floor? Bicycles!

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Just inside the factory entrance is a row of Tesla's prototypes.

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They range from this wood composite mockup of the Tesla Roadster used for wind tunnel testing to...

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... the first mockups of the Model S.

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Here's 'Red Alpha.' It was the first drivable Model S prototype. Tesla say they spent roughly $2.2 million on the prototype.

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Ever wonder what a Tesla Model S looks like without its body? Well here it is.

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Here's the front motor.

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Entering the production portion of the factory, the immediate impression any visitor gets is that everything is very clean and neatly organised.

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As the tour continued we made our way to Tesla's massive Schuler press. It's seven stories tall and is responsible for stamping out Tesla's aluminium body panels.

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Tesla claims the press is the largest machine of its kind in North America.

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There are racks upon racks of panels awaiting assembly.

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The Tesla Factory is comprised of two main production lines. Currently, Line One is dedicated to the Model S, while Line Two is responsible for the Model X.

This Model S is beginning to take shape.

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While this one just went through a quality control inspection of its welds.

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These cars are fresh out of the paint shop.

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Battery packs!

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These robots are putting together Tesla's electric powertrain.

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A sea of electric motors.

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These are the smaller of the two motors Tesla offers.

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This one is headed for a Model X.

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I spy a Model S under wraps.

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Here, a robot called Mystique is picking up a Model S. The factory's large robots are named after characters from Marvel's X-Men.

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Two of the coolest robots in the factory work in tandem with each other. They are called Wolverine and Iceman.

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Here's how they work. As this Model S approaches the robots...

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Wolverine activates.

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It lifts the car up and rotates it 180 degrees.

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At which point Iceman activates and receives the car from Wolverine.

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Iceman then turns the car another 180 degrees -- allowing it to continue down the production line.

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In all, the Tesla production line deploys more than 150 robots.

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However, not all of the of the Tesla is made by robots. The plant actually employs a few thousand people.

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Many parts of the car, such as the interior trim, must be installed by hand.

This Model S is awaiting its interior.

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There's nowhere to sit!

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And Voila! A complete Model S.

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However, the work is not done for the factory. The completed cars have to be sent to the dynamometer to gauge power output and then be prepped for delivery.

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In all, Tesla produces roughly 1,000 Model S sedans a week with Model X production ramping up in the near future.

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