Tesla and LG Energy Solution have finalized a major agreement backed by the U.S. Government: a $4.3 billion plan to build a Lithium Iron Phosphate (LFP) prismatic battery cell factory in Lansing, Michigan.
The deal was announced at the Indo-Pacific Energy Security Summit, where the U.S. Department of the Interior stated that "American-made cells will power Tesla's Megapack 3 energy storage systems produced in Houston, creating a robust domestic battery supply chain." The announcement also affirms preliminary reports of a Tesla–LG battery factory arrangement and sets production to begin in 2027.
Strengthening Tesla’s American Supply Chain
Tesla’s energy division is its fastest-growing segment, frequently achieving record deployments of Megapacks and Powerwalls. To sustain that pace, the company is deepening vertical integration. Sourcing LFP cells from Michigan helps sidestep geopolitical risks and tariffs tied to importing cells from Chinese suppliers such as CATL and BYD.
The Lansing site is planned for 50 GWh of annual capacity, augmenting Tesla’s existing LFP cell plant in Sparks, Nevada. Together with Tesla’s lithium refinery in Corpus Christi, Texas, the company is assembling a resilient domestic supply chain. The push for self-reliance also reaches into silicon, with Elon Musk recently noting the forthcoming launch of the "Terafab" AI chip factory project later this week.
Powering the Next Generation: Megapack 3 and Megablock
LFP cells produced in Michigan will feed Tesla’s newest industrial storage products, introduced last fall. Megapack 3 is a ground-up redesign of the company’s flagship unit, offering 5 MWh of usable energy and a simplified thermal bay that uses an enhanced Model Y heat pump—yielding 78% fewer connections and fewer potential failure points.
Tesla is also rolling out the Megablock, a plug-and-play platform that integrates these next-generation units. It is designed to be 23% faster to install while cutting construction costs by 40%. Tesla targets a commissioning rate of 1 GWh in just 20 business days—enough to power 400,000 homes in under a month.
Why LFP is the "Undisputed King"
For stationary storage, LFP is well suited to the task. Although it is not as light as nickel-based chemistries used in high-performance vehicles, it is more durable. LFP cells can deliver over 10,000 charge cycles, have practically zero risk of fire (thermal runaway), and avoid the use of costly minerals like cobalt.
Manufacturing these cells in Michigan enables Tesla’s customers to fully leverage tax credits under the U.S. Inflation Reduction Act (IRA), enhancing the economic appeal of Tesla’s energy offerings for large utility-scale projects versus competitors that still depend on imported batteries.
As Tesla Energy scales up, this $4.3 billion agreement positions the company with the battery supply needed to meet accelerating demand for a cleaner, more reliable grid.
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