French startup Holosolis to build 5GW PV module assembly plant

Facebook
Twitter
LinkedIn
Reddit
Email
Modules produced by Holosolis will target agriPV, residential and C&I rooftop. Image: Unsplash.

French startup Holosolis, founded by innovation group EIT InnoEnergy, has announced plans to build a 5GW solar module assembly plant in France.

Other partners in the project include real estate company IDEC Group – which specialises in the rooftop market – and French solar developer TSE, which specialises in agrivoltaics.

This article requires Premium SubscriptionBasic (FREE) Subscription

Unlock unlimited access for 12 whole months of distinctive global analysis

Photovoltaics International is now included.

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Unlimited digital access to the PV Tech Power journal catalogue
  • Unlimited digital access to the Photovoltaics International journal catalogue
  • Access to more than 1,000 technical papers
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

Commercial production is expected to start in 2025 with full capacity to be reached in 2027, when it will have an annual capacity of 5GW.

The plant will be located in the northeast of France in Sarreguemine, close to the German border, and aims to employ 1,700 people.

The modules produced at the plant will be focused on three markets: rooftop residential, commercial and industrial rooftop and agriPV, however, the technology used was not disclosed. PV Tech reached out to EIT InnoEnergy to know which technology will be used in the new plant.

Jan Jacob Boom-Wichers, CEO at Holosolis, commenting on the announcement, said: “We will manufacture the most energy efficient modules, incorporating the latest photovoltaic technologies, with the lowest carbon footprint and highest social standards. Scale effects and line automation will allow for a competitive cost to rival the global giants in the industry.”

This is the latest in a series of new solar module assembly plants in Europe that have been announced since the European Commission unveiled its Green Deal Industrial Plan in February, which aims to scale up domestic manufacturing capacity for net-zero technologies in the EU.

Upstream activity in France has been moving in the past several months, with startup Carbon set to build a 5GW cell and 3.5GW module assembly plant in Marseille, in the south of France which is expected to start operations in late 2025, while solar company Reden Solar plans to increase its module production capacity in France from 65MW to 200MW a year by 2024.

Moreover, EIT InnoEnergy’s project is part of the initiatives carried out by the European Solar PV Industrial Alliance (ESIA), of which it has been appointed as the secretariat. ESIA is targeting 30GW of manufacturing capacity across the entire value chain in Europe by 2025.

Read Next

June 25, 2025
The French National Assembly has rejected a proposal to implement a moratorium on utility-scale solar and wind projects.
June 24, 2025
Chinese solar manufacturing giant LONGi has signed an agreement with Indonesia’s Pertamina New & Renewable Energy to build a 1.4GW module assembly plant in West Java, Indonesia.
June 23, 2025
Waaree Energies will relocate its proposed 6GW vertically-integrated manufacturing facility for ingots, wafers, cells, and modules in India.
June 23, 2025
Solar project developer Cero Generation has started commercial operations at its 48MW Castrum agrivoltaics (agriPV) project in western Italy.
June 23, 2025
Q Energy and Velto Renewables have inaugurated Europe’s largest floating solar power plant in the Haute-Marne region of France.
June 19, 2025
Boralex is driving organic growth across Canada, the US, France, and the UK, fueled by a project pipeline totalling 8GW.

Subscribe to Newsletter

Upcoming Events

Upcoming Webinars
June 30, 2025
10am PST / 6pm BST
Solar Media Events
July 1, 2025
London, UK
Solar Media Events
July 1, 2025
London, UK
Media Partners, Solar Media Events
July 2, 2025
Bangkok, Thailand
Media Partners, Solar Media Events
September 2, 2025
Mexico City, Mexico