Tesla LG Energy Solution battery supply deal for Megapack 3 factory

The U.S. government has formally identified Tesla as the customer behind a previously undisclosed USD 4.3 billion battery procurement agreement signed with LG Energy Solution. The deal, initially revealed in mid-2025 without naming the buyer, is now confirmed to support Tesla’s expanding energy storage business. The contract is scheduled to commence in August 2027 and continue until July 2030, with provisions allowing an extension of up to seven additional years depending on future requirements.

Battery Supply to Support Megapack 3 Production

The agreement is strategically aligned with Tesla’s next-generation energy storage manufacturing plans. Batteries supplied by LG Energy Solution will be utilized in Tesla’s upcoming Megafactory located in Houston, Texas. This facility is dedicated to producing Megapack 3 systems, the latest iteration of Tesla’s large-scale energy storage solutions. The confirmation of this supply chain linkage highlights Tesla’s effort to secure stable, high-volume battery sourcing to support growing global demand for grid-scale storage applications.

Megafactory Houston Capacity and Output Plans

The Houston-based facility is designed with an annual production capacity of approximately 50 GWh. This output translates to nearly 10,000 Megapack 3 units per year, positioning it as a key hub in Tesla’s energy infrastructure expansion. The Megapack 3 system, introduced in late 2025, delivers 5 MWh per unit, representing a substantial improvement over the previous generation. The scale of this facility indicates Tesla’s intent to accelerate deployment of large-scale storage solutions across utilities and commercial sectors.

Performance Advancements in Megapack 3

The latest Megapack variant offers enhanced storage efficiency and higher energy density compared to its predecessor. With a 28% increase in capacity over Megapack 2, the system is optimized for grid stabilization, renewable energy integration, and peak load management. These advancements reinforce Tesla’s positioning in the energy storage systems segment, where performance improvements directly impact project economics and deployment scalability.

Domestic Manufacturing and Policy Advantages

Producing battery cells within the United States provides strategic advantages for Tesla’s customers. Projects utilizing domestically manufactured components are eligible for federal tax incentives, which significantly improve financial viability. By localizing battery production through LG Energy Solution’s facilities, Tesla strengthens its compliance with policy requirements while enhancing supply chain resilience and reducing dependency on imports.

LG Energy Solution’s Expanded Manufacturing Role

LG Energy Solution has consolidated full ownership of its Lansing battery facility following the acquisition of General Motors’ stake in their former joint venture. The plant, now entirely under LGES control, has an annual capacity of 50 GWh and is being repurposed to focus on energy storage system batteries. This transition underscores the growing importance of ESS applications within the broader battery market and highlights LGES’s strategic pivot toward high-growth segments.

The long-term supply agreement reflects a deepening collaboration between Tesla and LG Energy Solution, driven by the accelerating demand for large-scale energy storage. With secured battery sourcing, expanded manufacturing capacity, and alignment with domestic policy incentives, the partnership is positioned to play a critical role in scaling energy infrastructure solutions in the coming decade.