Samsung SDI restarts Synergy Cells investment for 2028 ramp

Samsung SDI resumed procurement and engineering preparations on Sept. 21 for its New Carlisle battery facility in Indiana, establishing an operational roadmap to commence commercial manufacturing in 2028.

The South Korean cell manufacturer will convert the 680-acre site into its first wholly owned manufacturing facility in North America. The factory was originally designed for an annual output capacity of 27 GWh.

The initial blueprints, drafted as a $3.5 billion joint venture with General Motors, contemplated scaling total cell output up to 36 GWh. The project was temporarily frozen earlier this year after exterior civil structures were completed.

To finance the standalone buildout, Samsung SDI secured 4.45 trillion won ($3.2 billion) in fresh cash on Aug. 21. The funds came from selling 13,088,235 common shares of Samsung Display back to the display unit.

The equity transaction reduced the battery maker's stake in the display subsidiary from 15.2% to 10.2%. Cash proceeds from the share repurchase were formally transferred to Samsung SDI on Aug. 27, according to regulatory filings.

The cash injection eliminated the need for external borrowing as the manufacturer assumes full capital expenditure liabilities for the Indiana site. The company had contributed 275.3 billion won ($200 million) to the venture through early August.

The ownership overhaul became official on Aug. 11, when Samsung SDI resolved to terminate its joint investment pact with General Motors. Samsung SDI agreed to buy the automaker's 49.99% equity holding in SDI-GM Synergy Cells Holdings.

Once formal regulatory transfers conclude, the operating company will adopt the name Samsung SDI Synergy Cells Holdings. That change grants Samsung SDI unilateral decision-making power over line allocation, chemistry choices and outside customer delivery schedules.

Automakers across the United States have curtailed battery intake schedules as electric vehicle sales volumes lagged corporate forecasts. General Motors halted interior fit-out work at the New Carlisle site in May to preserve operational capital.

Federal consumer subsidies under Section 30D ended in September 2025, accelerating an automotive retrenchment. S&P and local research data showed North American electric vehicle deliveries contracted 20.5% during the first half of 2026.

General Motors will maintain technology collaboration with Samsung SDI despite leaving the property. Both companies executed a joint development agreement on Aug. 11 to design high-energy-density prismatic batteries for future automotive platforms.

Samsung SDI is restructuring the factory floor to assemble energy storage system modules alongside automotive cells. The manufacturer intends to dedicate multiple lines to lithium iron phosphate chemistries to serve utility power developers.

The pivot aligns the Indiana footprint with surging power consumption from artificial intelligence data centers across the United States. Grid operators face severe generation constraints, lifting order volumes for containerized battery systems and uninterruptible power supplies.

Samsung SDI has secured multi-gigawatt supply agreements with American energy developers over the past year. Expanding domestic energy storage cell manufacturing enables the firm to fulfill those supply contracts without incurring steep transpacific shipping expenses.

The adjustment reflects an operational strategy already proven at StarPlus Energy, Samsung SDI's joint venture with Stellantis in Kokomo, Indiana. Samsung SDI converted three of the four lines at that facility to manufacture storage products.

Competitors across South Korea's battery sector are following similar restructuring paths. LG Energy Solution completed a 3.14 trillion won buyout of General Motors' stake in their Lansing, Michigan plant last year to operate the facility independently.

SK On likewise altered development plans for its joint venture plants, reviewing standalone production lines in Tennessee to fulfill grid-scale energy storage contracts starting in 2028.

Samsung SDI initiated preliminary technical consultations on Sept. 21 with domestic equipment makers to reconfigure cleanrooms and dry rooms at New Carlisle, according to suppliers familiar with the process.

Equipment fabricators had postponed manufacturing automated cell-handling machines and precision slitters when the Indiana site slowed down. Resuming specification reviews allows toolmakers to reactivate procurement chains for specialized mechanical components.

Under the updated operating schedule, Samsung SDI will finalize supplier tenders by mid-2027 to permit equipment installation across late 2027. Pilot line testing will precede commercial production runs scheduled for the second half of 2028.

Samsung SDI has not published an official regulatory disclosure confirming the revised equipment procurement timeline or the final capex budget for the New Carlisle site.