Chinese battery factories hit the brakes in Hungary

Author | Zhou Zhiyu

The rapid overseas expansion of China's new energy industry chain has encountered resistance.

A factory of Semcorp Hungary, a subsidiary of Enjie Co., Ltd. located in Debrecen, Hungary, has recently faced a series of local regulatory bans: first, its diaphragm production was suspended due to environmental issues, and then all activities on the factory site were prohibited due to fire safety problems.

A source close to Enjie Co., Ltd. told Wall Street Insights on July 7 that the Hungarian factory is still in a ramp-up phase, and its capacity accounts for a relatively low proportion of the company's overall capacity. Short-term delivery can also be coordinated through other bases. Regarding the production halt, the source stated that, on one hand, they are cooperating with the investigation, and on the other, they are continuing to push for a resumption of production.

Looking at Enjie alone, this is not a shutdown that will alter the company's European supply pattern.

However, the timing is delicate. Chinese automakers and battery industry chains are accelerating the relocation of production capacity overseas, and Europe is the most unavoidable destination. Tariffs, customer integration, and local manufacturing requirements are pushing companies from "exporting" to "building local factories." Hungary has historically been one of the most active recipients along this path, but now it is showing another side: after the factory is established, companies face not only orders and capacity but also a series of local issues such as environmental protection, fire safety, community relations, and politics.

This also serves as a warning for latecomers: building a factory in Europe requires more than just considering investment amounts and planned capacity. Whether a factory can operate long-term is becoming as important as whether it can be built.

The Stopped Factory

The suspension this time is not for an isolated production line.

On July 3 local time, the Hajdú-Bihar County Government Office in Hungary announced that the fire department immediately prohibited all activities at the Semcorp Hungary Debrecen factory, citing multiple fire safety issues discovered during inspections that jeopardized personnel and property safety. This ban covers all activities in the factory area, including production, operations, cleaning, and warehousing, and will only be lifted when the foam fire extinguishing system can operate continuously and normally.

The authorities also imposed a fire safety fine of 3 million Hungarian forints (approximately 65.7k RMB). The amount is not large, but the regulatory action is heavy.

Before the fire safety ban, the environmental department had already taken action.

On June 24, local regulators ordered the factory to suspend diaphragm production. The regulators believed that the factory's activities deviated from the requirements of the IPPC Integrated Pollution Prevention and Control permit, posing a risk of further environmental pollution. In groundwater test results, the aluminum concentration near the leak point reached 2.68M micrograms per liter, while the local allowable limit is 200 micrograms per liter—an exceedance of over 13k times. Additionally, multiple metal elements were detected above legal limits.

This changes the nature of the matter. Fire safety issues can still be resolved through equipment repairs and system acceptance; environmental issues, however, involve pollution sources, liability determination, remediation plans, and public trust, making it harder for companies to unilaterally determine the pace of production resumption.

Enjie's assessment is relatively restrained. The aforementioned source close to Enjie Co., Ltd. told Wall Street Insights that they are currently mainly cooperating with the local government investigation. The Hungarian factory has not yet reached full production, and its overall impact on the company is limited. She said, "Even if the Hungarian factory's capacity were maxed out, it would only be over 400 million square meters, and it's still in the ramp-up phase, not yet at the peak."

Data shows that Phase I of Enjie's Hungary project officially commenced production in July 2023, with a total capacity exceeding 400 million square meters. According to research by Aijian Securities, in 2025, the company's core product, lithium battery separator, has a designed capacity of 14.4 billion square meters, with a capacity utilization rate of 94.91%. By this measure, Phase I in Hungary accounts for approximately 3% of Enjie's total designed separator capacity.

Therefore, in the short term, this is not a supply disruption crisis for a leading diaphragm company.

The aforementioned source close to Enjie also mentioned, "For some customer deliveries, adjustments have already been made." Regarding customer deliveries, she further stated, "The impact on customers is not significant; we can still coordinate shipments from our other production bases."

Over the past few years, Enjie's core logic for building factories overseas has been to get close to European battery customers. Diaphragms are one of the most critical materials for lithium batteries. If diaphragm production is too far from customers, companies bear higher transportation, warehousing, and response costs; if the capacity is in Europe, it can theoretically shorten delivery lead times and respond faster to battery factory production changes.

From commissioning to full production, an overseas factory goes through a series of variables such as customer certification, yield ramp-up, local labor, and equipment debugging. What Enjie faces this time is an added regulatory variable: even if the factory is built, equipment installed, and customers nearby, environmental and fire safety issues can still pull the project back into a state of uncertainty.

In the past, when companies talked about going overseas, the most common metrics were investment amount, planned capacity, customer radius, and local subsidies. Now, regulatory compliance, community relations, and the pace of production resumption pose further tests for companies' overseas operations.

Localization Has Become a Hard Problem

Companies still need to go to Hungary.

This seems somewhat contradictory. On one hand, there are environmental and fire safety pressures; on the other, Chinese automakers, battery manufacturers, and materials companies continue to move production capacity to Europe. The reason is not complicated: the rules of the European market are forcing companies to shift from "selling to Europe" to "producing in Europe."

Tariffs are the most direct pressure. Following the EU's anti-subsidy investigation into Chinese electric vehicles, the cost for Chinese automakers to export to Europe is no longer determined solely by manufacturing efficiency. The EU had imposed anti-subsidy tariffs of up to 35.3% on Chinese EVs. Even though China and the EU later continued negotiations on price commitments, the direction is clear: Europe will not long tolerate Chinese new energy vehicles rapidly expanding market share solely through imports.

Regulatory pressure is slower but deeper.

The EU's Battery Regulation took effect in August 2023. The European Commission stated that the rules cover the entire lifecycle sustainability of batteries, from raw material sourcing, collection, recycling, and reuse. The EU expects global battery demand to grow 14-fold by 2030, with the EU potentially accounting for 17% of that. This means that while Europe needs a battery industry chain, it is gradually incorporating carbon footprint, recycling, due diligence, information disclosure, and product traceability into the regulatory framework.

For automakers and battery manufacturers, localization is not just about saving freight costs; it is about answering the question of market access.

This is also why Hungary has become the European bridgehead for China's lithium battery industry chain. Geographically, it connects to the German automotive industry chain; politically, it has long welcomed Chinese investment; and in terms of cost and subsidies, it is more attractive than Western Europe.

CATL has deployed a 100 GWh battery factory in Debrecen, with a project investment scale of several billion euros. BYD is building its first European passenger car factory in Szeged, with a planned capacity of up to 300k vehicles per year. EVE Energy is also deploying battery capacity in Debrecen for BMW's next-generation models. Enjie's diaphragm project is embedded in this chain.

CATL Chairman Zeng Yuqun previously mentioned when selecting a European site that building a factory in the UK is costly with insufficient potential customers; the core is still that where customers are, battery capacity must follow.

In Hungary's case, European customers like BMW, Mercedes-Benz, Volkswagen, and Stellantis are nearby, so battery and material manufacturers must also be close.

BYD's logic is more straightforward. In Europe, it faces not only price competition but also EU tariffs and local manufacturing requirements. BYD building a passenger car factory in Hungary essentially changes "exporting from China to Europe" to "producing in Europe, serving the European market." After this transformation, the automaker needs not just an assembly line but also a network of nearby batteries, electric drives, components, and materials.

It is a natural result for diaphragm companies to follow.

The problem is that localization in Europe reduces some trade risks but exposes companies to another set of risks. Once in Europe, projects face multi-layered regulation, local residents, environmental groups, labor unions, and political competition, from land acquisition, environmental assessment, and construction to operations.

Ding Chun, director of the Center for European Studies at Fudan University, told Wall Street Insights on July 7 that changes in Hungary's political environment could affect foreign investment. He believes that compared to the Orbán government, the Magyar government places greater emphasis on aligning with EU rules, "welcoming investment, but emphasizing compliance and adherence to sector standards."

In the past, one major selling point for Hungary to attract China's battery industry chain was policy friendliness. Now, this friendliness has not disappeared, but it has become conditional: investment is welcome, capacity can be built, but only if local social costs are not absorbed through lax regulation.

Ding Chun also noted that environmental issues are inherently sensitive locally, "not only for Chinese companies, but also for Korean companies like Samsung, whose environmental issues have also been closely watched by local residents."

This means that Korean and Japanese companies, which entered Hungary's battery industry chain earlier, have already faced similar problems. Chinese companies are now entering the same public forum, but on a larger scale and faster, making them more likely to become the next focal point.

For companies, localization remains a must, but it is not a pass. It is more like a stress test.

Slow Down to Catch Up

Enjie is not the only company facing trouble.

Since the beginning of this year, controversies related to Hungary's battery industry chain have increased significantly. Samsung SDI's battery factory in Göd was embroiled in disputes over environmental permits as early as 2025. Samsung's Göd factory employed over 4,000 people in 2023 and was an important pillar of Hungary's battery strategy, but it also became a concentrated case study for local environmental and occupational health disputes.

BYD's Szeged factory also faced labor scrutiny. CATL's Debrecen project has long faced questions about water usage and environmental footprint. Data from the Rhodium Group shows that over the past decade, Chinese battery companies have built or announced 68 facilities overseas, with at least five projects suspended or canceled.

Enjie's current situation is more like a concentrated lesson in operational governance after a high-growth industry rapidly expands overseas.

In the past few years, Chinese new energy companies going overseas emphasized speed. The domestic market was too competitive, and the overseas market offered more growth space; European automakers needed batteries, and Chinese companies had technological and cost advantages; Hungary offered land, subsidies, and policy certainty. This logic is not wrong, but it assumed a premise: once overseas capacity is built, it can ramp up smoothly like a mature domestic industrial park.

Now, that premise appears too optimistic.

The difficulty of overseas capacity is not just the construction period or simple labor and energy costs. The real challenge is embedding the high-efficiency manufacturing system familiar to Chinese companies into an environment more sensitive to environmental protection, community relations, and political accountability. Any anomaly in related links can cause a production line to go from a ramp-up state back to a waiting-for-permits state.

This will change the investment calculus for companies going overseas.

Previously, models for overseas factories mostly considered investment amounts, depreciation, labor, electricity prices, logistics, tariffs, and customer orders. Now, they must also account for the probability of shutdowns, rectification cycles, environmental remediation, legal and PR costs, local labor ratios, subcontractor compliance, and political cycles. For listed companies, these variables may not immediately appear on capacity planning sheets, but they will affect the turnover efficiency and return on investment of overseas assets.

That Enjie's short-term impact is limited actually makes this issue clearer.

The current suspension of its Hungarian factory is unlikely to affect overall delivery, and investors may easily see it as a local disturbance. But for the entire industry chain, the real question is: if more overseas factories go from ramp-up to full production in the future, will the financial impact of such regulatory interruptions amplify? If local residents, environmental groups, and political parties continue to scrutinize battery projects, will the overseas expansion pace assumed by companies remain stable?

Ding Chun told Wall Street Insights that overseas investment is influenced by local politics, "sometimes quite prominently."

He also reminded Chinese companies to pay attention to local compliance and community relations, saying, "How to do compliance well, how to do comprehensive and inclusive work including ESG with local residents, is also very important for companies going overseas."

Hungary will not close its doors to the battery industry because of this. Ding Chun judged that Hungary is still part of the European industry chain centered on Germany, with its own comparative advantages; as long as investment benefits the local economy, industry chain, and national interests, the impact of policy changes may exist but won't necessarily continue to amplify.

European automakers need local batteries, Chinese automakers need European capacity, and Chinese material companies need to be close to customers. EU tariffs and battery regulations continue to push supply chains locally, and the German automotive industry chain also needs a manufacturing hinterland that is lower cost and well-positioned. Hungary remains one of the few countries that simultaneously meets the conditions of policy, location, and cost.

However, the previous approach of "grabbing positions first, filling in details later" is becoming riskier.

The story of Chinese new energy companies building factories overseas is shifting from competition in investment amounts to competition in operational capabilities.

Building a factory is only the first hurdle. The real test is whether it can keep running smoothly in Europe over the long term.

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