Tesla and South Korean battery giant LG Energy have officially confirmed the construction of a $4.3 billion lithium iron phosphate battery factory in Lansing, Michigan, to support the rapid expansion of Tesla's energy storage system business.The U.S. Department of the Interior officially confirmed the deal in a statement. The factory will produce lithium iron phosphate prismatic batteries, with mass production scheduled to start next year. The products will be directly supplied to Tesla's Megapack 3 energy storage system produced in Houston. Bloomberg News first reported the cooperation agreement earlier this July.After the announcement, LG Energy's stock price rose by 3.3% during trading on the Seoul stock market.<img src="https://imageproxy.pbkrs.com/https://wpimg-wscn.awtmt.com/e9a4795b-c011-40f6-a260-8ce1640f145f.png?x-oss-process=image/auto-orient,1/interlace,1/resize,w_1440,h_1440/quality,q_95/format,jpg" alt="" original-src="https://imageproxy.pbkrs.com/https://wpimg-wscn.awtmt.com/e9a4795b-c011-40f6-a260-8ce1640f145f.png"/>For Tesla, this investment has urgent financial significance. The company currently relies heavily on overseas-manufactured lithium iron phosphate batteries, with tariffs impacting its energy storage business amounting to approximately $200 million in the third quarter of 2025. Establishing a factory in the U.S. will lay a more cost-competitive supply foundation for the continued expansion of its energy storage business.<h2>Factory Plan: Supply Megapack 3, Production Next Year</h2>The new factory, located in Lansing, Michigan, will specifically produce lithium iron phosphate prismatic batteries, with plans to officially start production next year. The batteries produced will be used in the Megapack 3 large-scale energy storage system manufactured at Tesla's Houston factory, completing the full chain from domestic battery production to energy storage system integration.The statement from the U.S. Department of the Interior indicated, &#34;Batteries manufactured in the U.S. will power Tesla's Megapack 3 energy storage system, forming a robust domestic battery supply chain.&#34; The project is also included in the U.S. energy security cooperation framework with Indo-Pacific countries, highlighting its strategic positioning.Tesla currently has a high dependence on overseas lithium iron phosphate batteries for its energy storage business, and this supply structure poses significant risks in the increasingly escalating tariff environment. The company disclosed that the impact of tariffs on its energy storage business is approximately $200 million in the third quarter of 2025.To alleviate this pressure, Tesla continues to seek localization of lithium iron phosphate battery manufacturing to reduce production costs and diversify supply chain risks. The joint factory with LG Energy Solutions in Michigan is a core deployment of this strategy.<h2>LG Bets on Energy Storage: EV Slowdown Forces Transformation</h2>For LG Energy, this collaboration is an important part of its strategy to actively explore the energy storage market. In the context of a slowdown in the U.S. electric vehicle market transformation and increasing competition from Chinese companies, the company is shifting its business focus to the rapidly growing energy storage sector.LG Energy, along with domestic competitors Samsung SDI and SK On, is transforming multiple electric vehicle battery production lines, aiming to increase energy storage battery capacity to over 60 gigawatt-hours this year. This capacity transformation led by Korean battery companies is reshaping the global energy storage supply landscape.The core driving force behind this strategic layout is the surge in electricity demand for data centers fueled by the wave of artificial intelligence. According to Bloomberg New Energy Finance (BloombergNEF), the demand for energy storage in U.S. data centers is expected to grow significantly starting in 2024, reaching 78 gigawatt-hours by 2035, more than doubling from 2024, and accounting for nearly 9% of the total electricity demand in the U.SThe growth rate surpasses that of the electric vehicle and hydrogen energy sectors.Samsung SDI expects the U.S. energy storage market size to increase from the current approximately 80 gigawatt-hours to 130 gigawatt-hours by 2030. In light of this strong demand outlook, Tesla and LG Energy have joined forces to seize the strategic high ground of the domestic energy storage supply chain in the United States

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Tesla and LG Energy have teamed up to invest $4.3 billion to jointly build a lithium iron phosphate battery factory in Lansing, Michigan, which will directly supply the Megapack 3 energy storage system after production begins next year. This move is not only Tesla's strategy to cope with the impact of approximately $200 million in tariffs each quarter but also a key transformation for the Korean battery giant as it bets on the energy storage sector amid slowing growth in electric vehicles. The surge in electricity demand for AI-driven data centers is pushing the energy storage industry into a new round of explosive growth

- Tesla and LG Energy have confirmed plans to build a $4.3 billion lithium iron phosphate battery factory in Lansing, Michigan, to support Tesla's energy storage system expansion.  
- The facility will produce prismatic lithium iron phosphate batteries for the Megapack 3 systems, with production expected to commence next year, enhancing Tesla's supply chain resilience amid increasing tariffs on imported batteries.  
- LG Energy aims to pivot towards the growing energy storage market, responding to competition and trends, particularly as demand for storage in U.S. data centers is projected to surge significantly by 2035.

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Tesla and LG Energy officially announced: investing $4.3 billion to jointly build a battery factory in the U.S