ACC (Automotive Cells Company) is Europe’s most strategically significant battery joint venture — a consortium of Stellantis, TotalEnergies, and Mercedes-Benz designed to establish a European battery cell manufacturing champion capable of competing with Asian manufacturers at scale. The company’s first gigafactory in Billy-Berclau, Hauts-de-France, began production in 2023, making ACC the first French battery cell manufacturer to achieve commercial operation. Total committed investment across three planned European sites exceeds €7 billion.

Origins and Strategic Logic

ACC was established in 2020 as the French and European automotive industry recognized that continued dependence on Asian battery cells — primarily from Chinese manufacturers (CATL, BYD, CALB) and South Korean manufacturers (LG Energy Solution, Samsung SDI, SK On) — was untenable for long-term competitiveness. An automotive manufacturer dependent on Asian battery supply faces two structural risks: supply disruption (pandemic, geopolitics) and cost disadvantage (as battery costs are increasingly the key vehicle cost driver).

The specific shareholder combination reflects complementary strategic interests:

Stellantis is the world’s fourth-largest automaker and the owner of PSA Group (Peugeot, Citroën, DS, Opel, Fiat, Chrysler). Stellantis needs battery cells for dozens of EV models across 14 brands. Having a shareholding in ACC ensures both supply security and input cost alignment with its battery supplier’s economics.

TotalEnergies is France’s oil and gas major transitioning aggressively into clean energy. Battery manufacturing provides exposure to the energy transition value chain at scale; TotalEnergies’ materials science capabilities (from petrochemicals) are relevant to battery electrode materials; and the strategic positioning of a French oil major as a battery manufacturer has political and reputational value.

Mercedes-Benz is the premium German automaker that has set industry-leading EV ambitions. Mercedes needs premium battery cells for its EQ series and requires quality and performance that justifies co-investment in technology development rather than simply purchasing from established suppliers.

The Billy-Berclau Gigafactory

ACC’s first facility is located in Billy-Berclau, in the Lens-Liévin basin of Hauts-de-France — historically France’s coal mining heartland, now a zone de reconversion industrielle (industrial conversion zone) that has attracted multiple large manufacturing investments with the assistance of the regional development agency.

Facility profile:

• Location: Billy-Berclau (between Lille and Lens)
• Phase 1 capacity: 13 GWh per year (cells)
• Target Phase 2 capacity: 40 GWh per year
• Technology: NMC (Nickel Manganese Cobalt) lithium-ion cells
• Cell format: Prismatic cells optimized for Stellantis’ STLA (Stellantis Automotive architecture) platform
• France 2030 support: Approximately €437 million in direct grants and IPCEI battery allocation
• Total investment (Phase 1): ~€1.5 billion
• Employment: 2,000 jobs at full Phase 1 operation

Production commenced in 2023, making ACC the first commercially operating French battery cell manufacturer. This milestone is commercially and symbolically significant — France 2030’s battery investment moved from announcement to industrial reality.

European Gigafactory Plan

ACC’s strategy involves three gigafactories across Europe, providing geographic and customer diversification:

The Kaiserslautern and Termoli sites have faced delays and uncertainty, reflecting the broader European battery manufacturing headwinds — slower-than-projected EV demand and competition from Chinese manufacturers that has made the economics of European battery manufacturing more challenging. ACC’s management has communicated a sequenced approach: consolidate Billy-Berclau’s success before committing fully to the German and Italian expansions.

Technology: NMC Chemistry and Solid-State Ambitions

ACC’s current production uses NMC (Nickel Manganese Cobalt) chemistry — the dominant technology for European automotive applications, offering high energy density and power capability at established manufacturing cost. The NMC chemistry requires careful cell design to manage thermal stability and optimize the nickel-manganese-cobalt ratio for specific vehicle applications.

ACC is also investing in solid-state battery technology development under its long-term roadmap. Solid-state batteries promise superior energy density and safety, but are not commercially viable at current costs. ACC’s approach is to continue current NMC production while investing in solid-state R&D — a technology hedging strategy shared by most major battery manufacturers globally.

France 2030’s IPCEI battery funding explicitly supports solid-state technology development at ACC as part of the longer-term technology roadmap.

France 2030 and IPCEI Support

ACC received approximately €437 million in public support for the Billy-Berclau facility from France 2030 programs and IPCEI battery allocations:

• Direct grant from SGPI (France 2030 gigafactory program): ~€200 million
• IPCEI Batteries allocation (EU state aid): ~€150 million
• Hauts-de-France regional support: ~€87 million

This public support represents approximately 10-15% of the total Phase 1 investment — a meaningful contribution that de-risked the private investment commitment but did not dominate the economics. The remainder was financed by shareholder capital and bank debt secured against committed customer offtake agreements.

Customer Relationships and Offtake

ACC’s shareholder structure creates natural customer relationships. Stellantis has committed to purchasing ACC cells for its French and European factories — specifically for models on the STLA Medium platform, which includes Peugeot e-3008, Citroën ë-C3, and DS models. Mercedes-Benz has committed to purchasing ACC cells for its German production.

These commitments provide revenue visibility that is unusual among battery startups — most pure-play battery companies spend years negotiating supply agreements with skeptical automotive customers. ACC’s ownership structure effectively pre-committed the supply agreements.

Competitive Positioning

ACC’s primary European competitors:

• CATL (China): Dominant global player with Erfurt factory operating; lowest cost; most advanced technology breadth
• Samsung SDI: South Korean manufacturer at Göd, Hungary; also in discussion for additional European sites
• Volkswagen PowerCo: In-house battery manufacturing at Salzgitter; targeting European supply for VW Group
• Northvolt: Swedish startup now in financial distress; demonstrated the difficulty of greenfield battery manufacturing
• LG Energy Solution: Korean manufacturer at Wrocław, Poland; well-established European supplier

ACC’s competitive position against CATL and Korean manufacturers depends on whether European automotive customers pay a premium for European-manufactured cells — to ensure supply chain security, meet EU Battery Regulation requirements, and maintain strategic supplier diversity. The evidence from 2023-2024 is that this premium is small and eroding as Chinese manufacturers pursue European market share.

Strategic Assessment

ACC is France’s most important battery success story — an operating gigafactory producing cells that go into commercially successful European EVs. It demonstrates that European battery manufacturing is achievable. The question is at what scale and at what cost.

The strategic risk: if Stellantis’s EV sales growth is slower than projected, or if Chinese competition intensifies at the price points where ACC’s cells are used, the utilization economics of Billy-Berclau deteriorate. ACC’s success requires both Stellantis’ commercial execution and European market protection — either through EU tariffs on Chinese EVs, domestic content requirements in the EU Battery Regulation, or simply competitive pricing.

For France 2030, ACC’s operating status is a crucial vindication. The plan bet billions on battery manufacturing; ACC is proof that the bet produced real industrial output.

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• Stellantis EV Strategy — Primary ACC customer
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