Tesla Inc. (TSLA) is betting big on vertical integration with its newly unveiled lithium refinery in Texas, and according to Elon Musk, it's not just big—it's the biggest. The facility represents the automaker's latest push to control more of its supply chain and reduce dependence on overseas mineral processing.

A North American First

Tesla shared a video on X Wednesday showcasing the refinery, which the company describes as the first facility in North America capable of converting spodumene ore directly into lithium hydroxide. Spodumene, a naturally occurring mineral, serves as one of the primary sources for extracting lithium—the critical ingredient in EV batteries.

"Regionalized access to critical battery minerals brings jobs, cuts emissions & helps accelerate our mission," Tesla said in the post. The emphasis on localized production addresses both supply chain vulnerabilities and environmental concerns around shipping raw materials across continents.

Musk's Clean Production Claims

Elon Musk didn't hold back in praising the Texas operation. In posts on X Wednesday, he called it the "largest Lithium refinery in America" and separately claimed Tesla had "built the most advanced lithium refinery in the world," emphasizing that the facility is "very clean."

The clean production angle matters. Lithium extraction and processing have faced criticism for environmental impact, so if Tesla can demonstrate a cleaner approach at scale, it could shift industry standards while improving the company's sustainability credentials.

Supporting Booming EV Demand

The refinery comes at a good time for Tesla's U.S. operations. The Model Y claimed the title of best-selling EV in America for 2025, moving over 357,528 units. The Model 3 added another 192,440 units, bringing total company sales to 589,000 vehicles.

Tesla recently rolled out a 7-seater version of the Model Y exclusively in the U.S., available with the Premium all-wheel drive trim for an additional $2,500. The company also offers a 6-seater Model Y L in China, where that configuration has performed well in the world's largest automotive market.

Energy Storage Growth

Beyond cars, the lithium refinery could prove crucial for Tesla's rapidly expanding energy storage business. In Q4, the company deployed a record 14.2 gigawatt-hours of energy storage, establishing what's becoming a significant revenue stream alongside vehicle sales.

More control over lithium processing means Tesla can potentially scale both businesses simultaneously without competing for limited battery supply with external customers or other automakers.

Price Action: TSLA declined 1.79% at market close Wednesday to $439.20, then slipped an additional 0.27% to $438 in after-hours trading.