Samsung SDI has secured an additional battery supply contract worth approximately 1.5 trillion won, about $1.1 billion, for energy storage system batteries in the United States, extending deliveries through 2029.
The agreement was signed by Samsung SDI America with a U.S. based energy company whose identity has not been disclosed due to confidentiality provisions. The batteries will be produced at StarPlus Energy, a joint venture manufacturing facility established by Samsung SDI and Stellantis in the state of Indiana.
Production will include two battery chemistries widely used in grid storage applications. The project will deploy nickel cobalt aluminum batteries alongside lithium iron phosphate batteries, allowing the developer to balance energy density, safety characteristics, and cost depending on the operational requirements of individual storage projects.
Although the end customer was not disclosed, the contract adds to a growing pipeline of energy storage supply agreements for the company in the United States. Late last year, Samsung SDI signed another agreement exceeding 2 trillion won for lithium iron phosphate batteries supplied to a U.S. energy infrastructure developer. Additional contracts have been secured in 2026, with negotiations reportedly ongoing for further projects.
The timing of these deals reflects broader structural shifts in the U.S. power sector. Rapid expansion of solar and wind generation is increasing the need for grid balancing infrastructure capable of storing electricity and releasing it during periods of peak demand. Utility scale battery systems have become one of the most deployable solutions for this challenge, particularly as lithium iron phosphate chemistry continues to dominate new installations due to its lower cost and longer cycle life.
Manufacturing location is becoming equally significant in the supply chain strategy for battery producers. The StarPlus Energy facility in Indiana forms part of a wider effort by battery manufacturers and automakers to establish production capacity within the United States. Domestic manufacturing has gained importance following policy incentives that prioritize North American supply chains for energy technologies and electric mobility components.
For Samsung SDI, diversifying battery production across multiple chemistries also reflects changing demand patterns in the energy storage market. While nickel cobalt aluminum batteries offer higher energy density and are widely used in electric vehicle applications, lithium iron phosphate cells are increasingly favored in stationary storage projects due to their lower material costs and improved thermal stability.
Energy storage providers are also increasingly offering integrated solutions rather than only battery cells. Samsung SDI has developed a containerized system known as the Samsung Battery Box designed to package battery modules, power electronics, and thermal management systems into a deployable grid storage unit. Whether that integrated solution will be included in the newly announced contract has not been disclosed.
