HoloSolis secures over €220 million in financing for Europe's largest solar module factory

HoloSolis, the French manufacturer of low-carbon European PV cells and modules, has raised over €220 million in public and private funding to build one of Europe's largest solar gigafactories in Sarreguemines-Hambach.

With the support of Calés Technologie and Forming, and a solid foundation of long-term investors including InnoEnergy, TSE, Groupe IDEC, Armor Group, and Heraeus, the project is expected to create 2,000 direct jobs and achieve a production capacity of 5 GW per year.

Once fully operational in 2030, the plant will produce enough solar modules annually to power one million European homes, representing a significant milestone for Europe's energy independence.

To achieve this scale, HoloSolis relies on a robust mix of private capital, regional support, and national industrial policy instruments. The funds will be used to finalize the factory design, implement TOPCon technology, and support recruitment and supply chain development.

In doing so, HoloSolis contributes to building a fully "Made in Europe" solar manufacturing ecosystem and strengthening Europe's energy sovereignty. The HoloSolis plant will help Europe meet the Net Zero Industry Act target of ensuring that 40% of PV systems deployed in Europe are manufactured within Europe.

Bertrand Lecacheux, CEO of HoloSolis, said: “HoloSolis already had strong partners: InnoEnergy, Armor Group, IDEC, TSE and Heraeus. I am proud that new partners are now joining us! We will be able to benefit from their expertise to build the largest TOPCon cell and module gigafactory in Europe. Several photovoltaic developers have decided to invest in the project, and we have a total of more than 20 GW of customer letters of intent, which underlines the strength of our business model.”

Karine Vernier , CEO of InnoEnergy France, noted: “HoloSolis embodies the goal we have pursued since day one: a strong and sovereign European solar industry. The fact that this project has overcome a crucial hurdle with more than 200 million euros fills InnoEnergy, a long-standing investor committed to the energy transition, with great pride.”

Jean-Paul Calès, President of CALES Technologies, said: “The investment in HOLOSOLIS reinforces our conviction that the energy transition must be supported by a high-performing, innovative and responsible French industry. Through our subsidiaries, we promote national industrial expertise and actively contribute to a more sustainable and sovereign economy.”

Eric Lauer, Strategic Development Manager at Forming AG, added: “Supporting the reindustrialization of France is central to Forming AG’s ambitions. Beyond this investment, Forming will contribute its expertise at the interface between photovoltaic modules and structures to improve their performance.”

Franck Leroy , President of the Grand Est Region, said: “This is a crucial step for HoloSolis’ Gigafactory project in Hambach: More than €200 million in secured investments and strengthened partnerships confirm that it will enter its operational phase in 2026. I would like to commend the professionalism and continued commitment of the HoloSolis teams. With 1,700 newly created jobs, this project contributes to Europe’s energy sovereignty and the reindustrialization of our regions.”