General Motors is reducing its exposure to large scale EV battery manufacturing, selling its 49.99% stake in a $3.5 billion battery joint venture with Samsung SDI as slower US electric vehicle growth forces automakers to reassess capacity, chemistry and capital allocation.
Samsung SDI will acquire GM’s interest in SynergyCells, giving the South Korean battery manufacturer full ownership of the planned facility in New Carlisle, Indiana. The transaction changes the strategic purpose of a project originally conceived primarily around electric vehicle batteries and illustrates how rapidly automakers are adjusting battery investments to changing market conditions.
The Indiana facility was announced in 2023 with planned investment of approximately $3.5 billion. Initial production capacity was expected to reach 27 GWh annually before being increased to as much as 36 GWh. The 275 hectare site was also projected to create more than 1,600 jobs.
Production has been delayed from its original 2026 target to 2027, and the plant is not yet operational. Rather than immediately supplying GM electric vehicles, Samsung SDI now intends to use the facility initially for energy storage system batteries.
That change is strategically significant because stationary storage offers battery manufacturers another source of demand at a time when EV sales growth has fallen below many earlier industry expectations. Grid scale batteries are increasingly being deployed to integrate renewable generation, manage peak demand and provide flexibility as electricity systems become more dependent on variable wind and solar output.
GM Reduces Exposure to Battery Manufacturing
The transaction is the latest indication that GM is reassessing how much battery manufacturing capacity it needs to control directly.
GM and Samsung SDI had originally planned to manufacture nickel rich prismatic battery cells at the Indiana facility. The companies are now pursuing a separate agreement to develop next generation prismatic cells for potential future EV applications.
The distinction between the two strategies matters. GM is not abandoning battery development, but it is becoming more selective about the technologies and manufacturing assets to which it commits capital.
The company has increasingly emphasized lower cost battery chemistries, including lithium manganese rich cells being developed with LG Energy Solution. LMR technology is intended to reduce reliance on more expensive nickel rich chemistries while maintaining sufficient energy density for automotive applications.
That shift reflects a fundamental change in the economics of EV manufacturing. As automakers compete for price sensitive consumers, reducing battery costs has become at least as important as maximizing energy density.
GM’s financial restructuring reinforces the scale of the adjustment. The automaker recorded a $1.6 billion write down related largely to its EV business in October 2025, followed by another $6 billion write down in January 2026 as it reassessed its electric vehicle investments.
The company has also previously reduced its ownership exposure to battery manufacturing. In 2024, GM sold its interest in a battery cell facility in Lansing, Michigan, to LG Energy Solution.
Taken together, the transactions point toward a model in which GM continues to develop battery technology and maintain access to domestic cell production while reducing the amount of manufacturing capital it carries directly.
The Indiana facility can now be positioned around the US energy storage market rather than depending entirely on the pace of EV adoption. That provides Samsung SDI with greater flexibility as demand for batteries expands beyond transportation.
The shift also reflects an increasingly important characteristic of battery manufacturing: the same underlying cell manufacturing infrastructure can potentially serve multiple markets, but chemistry, form factor, performance requirements and customer contracts differ significantly between automotive and stationary applications.
Energy storage systems generally place less emphasis on weight and volumetric energy density than electric vehicles. That can make alternative cell configurations and chemistries commercially attractive even when they would be less competitive in passenger vehicles.
For Samsung SDI, the ability to redirect the Indiana factory toward ESS therefore reduces its dependence on automotive demand while maintaining the option of producing automotive cells later.
The company has said the facility could eventually manufacture the jointly developed prismatic cells for GM, although no confirmed EV production plan has been established.
Battery Investment Is Becoming More Flexible
GM’s decision also highlights a broader problem facing automakers that expanded battery capacity based on aggressive EV adoption forecasts.
Battery plants require billions of dollars in capital and long construction timelines. If vehicle demand grows more slowly than expected, manufacturers can be left with underutilized facilities and high fixed costs.
Ford dissolved its BlueOval SK battery joint venture in December 2025, with ownership of planned facilities subsequently divided between Ford and SK On. Stellantis has likewise adjusted its electrification strategy as EV adoption has developed more slowly than many earlier forecasts anticipated.
These decisions do not necessarily represent a retreat from electrification. Instead, they indicate that automakers are placing greater emphasis on production flexibility, battery cost and capital efficiency.
For battery manufacturers, the implication is equally important. Automotive customers remain a major source of demand, but stationary storage provides an increasingly valuable diversification strategy.
GM’s movement toward LMR batteries illustrates why battery chemistry is becoming central to the economics of EV deployment.
Nickel rich NMC cells can provide high energy density, but their dependence on nickel and other costly materials creates exposure to commodity prices and supply chain risks. LMR cells offer a potential route toward lower costs by changing the balance of active materials.
The tradeoff is that lower cost chemistry must still meet the range, charging and durability requirements expected by vehicle customers.
This makes battery manufacturing decisions increasingly dependent on vehicle segment. A chemistry that is attractive for a large electric SUV may not have the same economics in a stationary storage system, while a battery optimized for grid storage may face unnecessary cost pressures if evaluated primarily through automotive performance metrics.
Samsung SDI’s decision to initially use the Indiana plant for ESS therefore gives the facility a market where different performance priorities can be applied.
The most important issue for the Indiana project may ultimately be whether Samsung SDI can maintain high utilization of the facility as markets evolve.
A plant designed for up to 36 GWh of annual production represents substantial manufacturing capacity. Redirecting that output toward stationary storage can provide a new demand channel, but the economics will depend on battery prices, US storage deployment, project pipelines and the competitiveness of Samsung SDI against other domestic and international suppliers.
For GM, selling the stake transfers much of that manufacturing risk to Samsung SDI while preserving a commercial relationship and potential access to future prismatic cells.
For Samsung SDI, full ownership provides greater control over production decisions and allows the company to align the facility with whichever battery market offers stronger demand.
