HoloSolis Raises €220M To Build One Of Europe’s Largest Solar Gigafactories In France

The round was supported by Calés Technologie, Forming, and existing investors including InnoEnergy, TSE, Groupe IDEC, Armor Group, and Heraeus.

Bertrand Lecacheux, CEO of HoloSolis says: “HoloSolis already had strong partners: InnoEnergy, Armor Group, IDEC, TSE, and Heraeus. I am very proud that new partners are 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 chosen to invest in the project and we have a total of more than 20 GW of customer letters of intent, which demonstrates the strength of our business model.”

In 2025, several European startups in solar and energy-transition sectors secured funding, providing context for HoloSolis’ recent raise. In France, Solarock raised €7M to expand its solar self-consumption franchise, while Dracula Technologies extended its Series A to €30M for ambient-light energy modules.

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In Germany, feld.energy secured over €10M for dual-use agrivoltaics, and Co-Power obtained €6.4M for on-site storage and industrial PV projects. In the Baltics, Estonia’s Sunly raised nearly €85M to develop large-scale solar parks in Latvia.

Together, these funding rounds total around €108 million well below HoloSolis’ €220 million raise underscoring the significantly higher capital needed to scale up PV manufacturing in Europe.

Karine Vernier, CEO of InnoEnergy France adds: “HoloSolis embodies the ambition we have had since day one: a strong and sovereign European solar industry. Seeing this project reach a decisive milestone with more than €200 million secured is a source of immense pride for InnoEnergy, a long-standing investor committed to the energy transition.”

HoloSolis, founded in 2022 aims to reshore PV production in Europe, meeting growing demand from EU developers driven by new European and national regulations. Its large-scale production is expected to offer a sustainable and competitive alternative to existing PV panels on the market.

Jean-Paul Calès, President of CALES TECHNOLOGIES says: “Investing in HOLOSOLIS affirms our conviction that the energy transition must be supported by a high-performing, innovative, and responsible French industry. Through our subsidiaries, we are committed to promoting national industrial expertise and actively contributing to a more sustainable and sovereign economy.”

The HoloSolis project is expected to create 2,000 direct jobs and achieve an annual production capacity of 5 GW. By 2030, the plant will generate enough solar modules to power one million European homes advancing Europe’s energy independence. Funding will support factory design, TOPCon technology deployment, recruitment, and supply-chain setup, helping build a fully “Made in Europe” solar ecosystem and supporting the Net Zero Industry Act goal of 40% locally produced PV.

Eric Lauer, Strategic Development Manager at Forming AG shares: “Supporting the reindustrialisation of France is at the heart of Forming AG’s ambitions! Beyond this investment, Forming will contribute its expertise in the interface between photovoltaic panels and structures to improve their performance.”

Franck Leroy, President of the Grand Est Region says: “This is a decisive step forward for HoloSolis’ gigafactory project in Hambach: more than €200 million secured and strengthened partnerships confirm that it will enter the operational phase in 2026. I would like to commend the professionalism and ongoing commitment of the HoloSolis teams. This project contributes to Europe’s energy sovereignty and the reindustrialisation of our regions, with 1,700 jobs at stake.“

About HoloSolis

HoloSolis is reshaping European solar manufacturing, producing high-efficiency PV modules with low carbon footprints and strong social standards. Founded to strengthen Europe’s energy sovereignty the company leverages advanced photovoltaic technologies to deliver “Made in Europe” solar solutions that power homes sustainably while supporting local jobs and a resilient renewable energy ecosystem.