The European Commission unveiled its Industrial Accelerator Act (IAA) on March 4, 2026, a sweeping legislative proposal that would require most electric vehicles sold in the EU to carry batteries manufactured on European soil. Starting around 2027, roughly two-thirds of EVs eligible for corporate car tax incentives will need to meet new local content thresholds for their battery packs. The same week, the transport policy group T&E published a parallel proposal calling for mandatory Vehicle-to-Grid (V2G) readiness in all new EVs by 2032. Seven weeks on, the IAA is in legislative negotiations at the European Parliament — and the reaction from industry has exposed a fault line between battery makers who welcome the rules and automakers wary of the compliance burden. Europe wants its own battery supply chain, and the IAA lays down concrete rules. Credit: AI-generated What the IAA Actually Requires The IAA is now in ordinary legislative procedure at the European Parliament and Council. AI-generated The proposed IAA defines what counts as a "made-in-EU" battery. To qualify, at least three key components, including the cells themselves, must be produced within the European Union. By 2030, the bar rises: five components will need European origins, including cells, cathode active materials (CAM), and battery management systems (BMS). The requirements apply to EVs, plug-in hybrids, and fuel cell vehicles seeking public support, not to all vehicles on the market. These rules primarily apply to EVs seeking corporate car tax incentives. Corporate fleets account for a large share of new car registrations across Europe, so the practical impact is broad. Automakers that want access to these tax benefits will need to source batteries from European factories or risk losing a major sales channel. Transport & Environment estimates that roughly two-thirds of EU EV sales fall under the scope of the new rules from 2027. The law goes beyond batteries. EVs must also contain green steel, and 70% of non-battery components need to be produced in the EU. The message is clear: Europe wants integrated manufacturing, not just final assembly of imported parts. The IAA also introduces FDI screening for large non-EU investments in strategic sectors, with caps of 49% ownership and requirements for at least 50% EU workforce and 30% EU inputs for gigafactory projects above €100 million. Key IAA Battery Requirements 2027 (approx.): At least 3 battery components (including cells) made in the EU 2030 (approx.): At least 5 components (cells + CAM + BMS + two others) made in the EU Scope: Corporate car tax incentive eligibility, state aid above 45-100% of budget, public procurement above EU thresholds, and auction volumes above 40% EVs overall: EU assembly required; green steel required; 70% non-battery content from EU Grid batteries: Separate rules for BESS above 1 MWh — EU-origin system and BMS initially, plus cells and one additional component by 2030 The Loopholes That Worry Critics T&E, which has been one of the loudest advocates for European battery manufacturing, praised the direction of the IAA but flagged several concerns. The most significant: cathode precursors (pCAM), which account for more than half the value of a battery cell, are excluded from the local content requirements. This omission could undermine the economics of domestic recycling, since recyclers depend on selling recovered cathode materials back into the local supply chain. The act also extends EV purchase subsidies to vehicles from countries with existing free trade agreements (FTAs). Critics argue this creates a backdoor that could allow imported EVs to benefit from European taxpayer money without supporting European jobs. T&E called this "mission creep" from the original intent of the legislation. A third issue: the IAA now covers non-strategic components like seats and seat belts. Broadening the scope dilutes focus on the components that actually matter for energy security and industrial competitiveness. Julia Poliscanova, T&E's senior director for vehicles and e-mobility supply chains, urged lawmakers to "tighten the many loopholes to truly give investors certainty that they can bank on Europe's battery industry." Automakers have raised their own concerns. Germany's VDA industry association said local content rules alone will not fix Europe's competitiveness problem, pointing to a roughly 20% cost disadvantage for European manufacturers versus Asian rivals. Volkswagen, Stellantis, and others have also sought clarity on an "equivalence" clause that would let non-EU components from FTA partner countries count toward local content thresholds — a provision that could significantly dilute the rules depending on how it is interpreted. The Gigafactory Reality Check Cell manufacturing capacity across Europe is expanding, but several planned gigafactories have stalled or been cancelled. AI-generated The IAA arrives at a complicated moment for European battery manufacturing. The gigafactory buildout that looked unstoppable two years ago has since hit headwinds — and the divergence between winners and losers has become stark. Company Status (April 2026) Details Northvolt Defunct Filed bankruptcy; production halted. Assets sold, including to Lyten for lithium-sulfur R&D. ACC Scaled back Cancelled Germany and Italy gigafactories in February 2026, citing weak EV demand. Called new builds "totally irresponsible." France plant still ramping. CATL (Hungary) Expanding 100 GWh Debrecen plant targeting profitability in 2026. Also pursuing Spain JV with Stellantis. Samsung SDI (Indiana/EU) Ongoing U.S. StarPlus Energy plant kept alive by €1.05B Samsung SDI loan; European operations continuing. Tata/Agratas (UK) Funded £380M UK government commitment secured in April 2026; Somerset gigafactory on track. Hithium (Spain) Announced €400M agreement with Navarre region signed April 2026; 700 planned jobs for grid storage focus. The pattern is clear: Chinese manufacturers with European factories (CATL, Hithium) are advancing, while European-owned battery ventures struggle with cost structures. The IAA's local content rules could give established EU-based producers a competitive edge in public procurement — but only if those factories are actually running when the rules kick in around 2027. ~67% Share of EU EV sales affected by IAA rules from 2027 85,000 Estimated jobs created if the IAA achieves its supply-chain goals ~80% China's share of global battery production the IAA is designed to reduce V2G: Making Every EV Battery a Grid Asset Bidirectional charging could turn millions of parked EVs into distributed grid storage. AI-generated While the IAA focuses on where batteries are made, T&E's V2G proposal asks a different question: what happens to all that battery capacity once it is sitting in driveways and parking garages? The group is pushing for a voluntary "V2G-ready" label on new EVs, tied to EU type-approval standards. Under their plan, this label would become mandatory for all new EVs sold in the EU by 2032. To qualify as V2G-ready, an EV would need to comply with ISO 15118-20 interoperability standards, integrate an onboard charger capable of DC-to-AC inversion, and share real-time battery data (state of health, state of charge, capacity, location) with authorized third parties. The proposal states that automakers should not lock V2G functionality behind paywalls or activation fees. The economic logic is straightforward. Europe expects tens of millions of EVs on its roads by 2030. Each one carries a battery pack ranging from 40 kWh to over 100 kWh. If even a fraction of those vehicles can feed energy back into the grid during peak demand, the aggregate storage capacity dwarfs anything the stationary BESS industry can deploy in the same timeframe. Grid operators see V2G as a way to absorb more intermittent renewable generation without building as many dedicated storage facilities. What This Means for the Battery Industry European ba