Tesla Secures $4.3B LFP Battery Deal with LG for Megapack 3
The US government has confirmed that Tesla is the customer behind LG Energy Solution’s significant $4.3 billion lithium iron phosphate (LFP) battery contract. This announcement resolves months of speculation following LG’s disclosure of the deal in July. The three-year agreement involves the production of LFP prismatic cells at LG’s Lansing, Michigan factory, set to commence in 2027. These cells will be utilized in Tesla’s next-generation Megapack 3 energy storage systems, which are assembled at the company’s Houston Megafactory.
Tesla’s Strategic Move to Secure Domestic Battery Supply
This confirmation was made public during the Indo-Pacific Energy Security Summit, organized by the US government. The Department of the Interior emphasized that American-made cells would power Tesla’s Megapack 3 systems. This strategy aims to strengthen the domestic battery supply chain amidst growing tariffs on Chinese battery imports.
Tesla’s energy storage division is the only consistently growing segment of the company. However, it has faced challenges due to tariffs on LFP cells sourced from China, which could impact its growth. Tesla’s CFO previously warned of the potential financial burden from these tariffs.
Impact of Tariffs on Tesla’s Business
- Tariffs on Chinese LFP cells can reach up to 82.4%.
- The energy storage division deployed 31.4 GWh in 2024, doubling from the previous year.
- In 2025, deployment increased to 46.7 GWh.
The LG contract is crucial for ensuring a domestic LFP supply, allowing Tesla to avoid absorbing high tariff costs. Without this deal, Tesla would face significant challenges in scaling up Megapack production.
LG’s Lansing Facility Transition
The LFP cells will be manufactured at LG’s Lansing facility, formerly a joint venture with General Motors. This factory, initially established for Ultium Cells, is undergoing a transformation to accommodate LFP production. LG will invest in new equipment to prepare for mass production by the latter half of 2027, in line with the contract’s start date of August 2027.
Broader Battery Supply Strategy
This deal is part of Tesla’s larger initiative to secure domestic battery supplies. In November 2025, Tesla also formed a $2.1 billion partnership with Samsung SDI for about 10 GWh of LFP cells annually. Collectively, these agreements represent over $6.4 billion in battery supply commitments for Tesla’s energy storage products.
Megapack 3: The Future of Energy Storage
The LFP cells from LG will supply Tesla’s Megapack 3, which was unveiled in September 2025. The new version features larger 2.8-liter battery cells, boasting approximately 5 MWh of capacity per unit. Additionally, Tesla has simplified its thermal management system, significantly improving efficiency.
Production of Megapack 3 is scheduled to begin at the Houston Megafactory in late 2026. Initially, Tesla may rely on existing stock or alternate suppliers until LG’s output comes online in 2027.
Conclusion
This $4.3 billion deal marks a pivotal moment for Tesla’s energy division. It alleviates reliance on Chinese imports and bolsters domestic battery production. With LG committed to supplying LFP batteries, Tesla is poised to enhance its energy storage capabilities while mitigating tariff risks. This strategic initiative solidifies Tesla’s position in the constantly evolving energy storage market.
