Samsung SDI Takes Full Control of the New Carlisle Battery Plant, and Pivots Away from EVs

General Motors has exited its 49.99% stake in SynergyCells, the $3.5 billion battery joint venture in New Carlisle. GM cited weaker-than-expected EV demand. Samsung SDI now owns the facility outright and is pivoting from EV prismatic cell production toward grid-scale energy storage.

The mechanism driving that decision is Section 45X of the tax code, which was written to cover battery cells across end-uses, EV and stationary storage alike. That neutrality means a facility built with EV supply chain assumptions can pivot to grid-scale energy storage without losing the $35 per kilowatt-hour production credit. Samsung SDI is doing exactly that. The competitive consequence is that the company is now competing for grid-scale battery contracts against LG Energy Solution and Panasonic rather than supplying Indiana's automotive OEM ecosystem. The 1,700 jobs originally projected for that plant are now tied to energy storage demand cycles, not automotive production schedules.

The geographic overlap matters. Rep. Rudy Yakym, whose district includes New Carlisle, is simultaneously backing Trade Representative Jamieson Greer's strategy to transition USMCA into annual reviews conditioned on policy concessions from Mexico and Canada. If regional value content thresholds rise toward the reported 82%, that compresses capital allocation decisions for Mexican Tier 1 and Tier 2 suppliers that Indiana OEMs depend on.

What to do now: If your supply chain carries any USMCA rule-of-origin exposure, get someone working this before the next annual review sets new terms.