Business
March 16, 2026
Tesla may have just cut one of its most important battery ties and has kept it on the low. Amidst this, the firm has entered a $4.3 billion deal with LG Energy Solution to build a Michigan factory that will power Tesla Megapack 3. But the bigger shift is who is no longer in the picture.
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Tesla’s $4.3B LG Energy Deal, Megapack 3, and the End of CATL Dependency
The agreement, confirmed by the US government, is linked to a wider $56 billion push to secure energy infrastructure and supply chains. The Michigan plant will start production in 2027. They will supply cells for Tesla’s Houston Megafactory and bolster a domestic battery supply pipeline at a time when global sourcing has become uncertain.
The U.S. Department of the Interior said,
“American-made cells will power Tesla’s Megapack 3 energy storage systems produced in Houston, creating a robust domestic battery supply chain.”
Tesla has cut ties with the Chinese battery firm CATL (Contemporary Amperex Technology Co., Limited). This partnership has played a major role in scaling its lithium iron phosphate (LFP) battery strategy. This is mostly because of its lower costs. But the setup isn’t comfortable anymore. Rising tariffs and ongoing political tensions have made depending on Chinese imports a lot less predictable.
Recent reports point out that Tesla has been looking to localize battery sourcing for its energy storage business. This is where LG Energy Solutions comes into the picture. The South Korean firm is one of the very few players that can produce LFP battery cells that Tesla is in need of, at scale, outside China. This gives Tesla a great alternative.
The latest move comes at a time when competition in the EV space is rising. More recently, BlockNow reported how BYD was overtaking Tesla in multiple global markets.
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Where Does Megapack 3 Fit In All This
Tesla’s Megapack 3 is at the center of the deal. The system, launched in September 2025, stores about 5 MWh in a 28-foot unit and is designed for longer-duration grid use. Tesla has also reworked part of the design. This includes a much simpler thermal setup and a wide operating range from -40°C to 60°C.
Data from recent reports reveal that Tesla has made it easier to install. This move is important, as installation is often where large-scale projects see a slowdown.
The project itself was announced as part of a broader set of energy deals revealed during the Indo-Pacific Energy Security Summit. This shows how vital storage is becoming to energy planning.
Tesla’s move doesn’t look dramatic, but it subtly tightens control over one of the most critical parts of its business. In addition, the latest expansion reflects Tesla’s wider strategy under Elon Musk. The businessman has been pushing the firm beyond automobiles into other high-growth sectors.
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