Holosolis
HoloSolis SAS is a French photovoltaic manufacturer building Europe's largest 5 GW TOPCon cell and module gigafactory in Sarreguemines-Hambach, targeting B2B sales to European utilities and solar project developers seeking domestically produced, low-carbon modules from 2027.
- Company typePrivate
- Founded2023
- HeadquartersParis, France
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Holosolis does
HoloSolis SAS is a French photovoltaic manufacturer building what it positions as Europe's largest TOPCon cell and module gigafactory, located on a 50-hectare site in Sarreguemines-Hambach, Moselle, France. Founded in 2022 by InnoEnergy, the company manufactures N-type TOPCon (Tunnel Oxide Passivated Contact) photovoltaic cells and modules using phosphorus-doped silicon wafers under a "zero critical metal" policy that excludes indium and reduces silver consumption. Production covers the full vertically integrated stack: semiconductor-grade cell fabrication in cleanroom environments (surface preparation, junction formation, antireflective coating, metallization) and automated 10-step module assembly (cutting, interconnection, lay-up, encapsulation, lamination, framing, junction box installation, inspection). R&D partnerships with Fraunhofer ISE and CEA INES cover ongoing TOPCon optimization and perovskite-silicon tandem cell development.
The go-to-market is enterprise B2B sales targeting European solar project developers, utilities, and energy companies seeking domestically manufactured, low-carbon modules to address supply chain dependence on Asian producers and EU energy sovereignty concerns. At full capacity the facility is designed for 5 GW annual production, equivalent to 10 million modules per year or approximately 1 million European homes. Construction of buildings is scheduled to begin in 2026, first modules ship in 2027, and full operational capacity is targeted for 2030. Revenue mechanics are quote-based contract pricing for large-scale deployments; the company reported over 20 GW of customer interest following its November 2025 funding announcement, though no commercial contracts are disclosed and the company is currently pre-revenue.
Capitalization is structured as a French SAS (Société par Actions Simplifiée) with €500,000 share capital, backed by a consortium combining strategic industrial investors and public financing. Equity holders include InnoEnergy (founder and primary institutional backer), Armor Group (20% stake acquired November 2023 for perovskite-silicon tandem R&D), Heraeus (undisclosed stake acquired October 2023, supplying silver metallization pastes), Trinasolar (technical partner with 260+ GW delivered globally), Groupe IDEC, TSE, Forming AG, CALES Technologies, and Ecolab. Public funding flows through BPI France and the France 2030 plan via the C3IV green industry investment tax credit, with regional support from Grand Est and Sarreguemines Confluences. Total planned gigafactory investment is €850 million.
Holosolis firmographics
Firmographics- Name
- Holosolis
- Legal name
- HoloSolis SAS
- Website
- https://holosolis.com/
- Company type
- Private
- Founded year
- 2023
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- HoloSolis SAS is a French photovoltaic manufacturer building Europe's largest 5 GW TOPCon cell and module gigafactory in Sarreguemines-Hambach, targeting B2B sales to European utilities and solar project developers seeking domestically produced, low-carbon modules from 2027.
- Ownership category
- akta.pro rank
Holosolis industry classification
Industry- Product category
- Solar Photovoltaic Manufacturing
- NAICS
- Other Electronic Component Manufacturing (334419)
- SIC
- Semiconductors & Related Devices (3674)
- akta.pro primary industry
- Solar PV Module & Cell Manufacturing (Crystalline, Thin-Film) (EUAMAHAA)
- akta.pro secondary industries
- Solar PV Module Manufacturing (Cells, Modules, Thin-Film) (EUAMABAD), Solar Plant Components Supply & Manufacturing (Modules, Cells, Wafers, Mirrors, Heliostats) (EUACAGAK)
Keywords
Where Holosolis is headquartered
LocationHeadquarters
- HQ city
- Paris
- HQ country
- France
- HQ region
- Europe
Offices2 records
Markets served
Holosolis business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Infrastructure, Personnel, Supply Chain, Technology or R&D, Operations
Revenue model
- Solar Module Sales: Revenue from manufacturing and selling TOPCon photovoltaic modules and cells to European solar project developers, utilities, and energy companies. Production capacity of 5 GW annually producing 10 million modules.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Holosolis product offering
Product offeringCore offering
HoloSolis manufactures high-efficiency N-type TOPCon photovoltaic cells and assembles them into finished photovoltaic modules at a planned 5 GW gigafactory in Sarreguemines-Hambach, France, targeting 10 million modules per year at full capacity. Production is vertically integrated into separate cleanroom cell and module lines, with cell manufacturing centered on tunnel oxide passivated contact architecture that excludes indium and minimizes silver use. The output is sold to European utilities, solar project developers, and energy companies seeking domestically produced, low-carbon solar modules.
Product overview
HoloSolis is a French solar PV manufacturer producing TOPCon n-type photovoltaic cells and photovoltaic modules. The company operates as a single unified manufacturing operation with two distinct production lines: cell production (requiring semiconductor-like precision in cleanroom facilities) and module assembly (the encapsulation and finishing of cells into ready-to-install solar panels). The products work together as an integrated solar energy solution, with cells being the core semiconductor component manufactured internally and modules being the final consumer-facing product.
Differentiator
Problem solved
Functional benefit
Products and services
- Photovoltaic Cells (TOPCon N-Type) High-performance N-type TOPCon (Tunnel Oxide Passivated Contact) photovoltaic cells manufactured by HoloSolis using phosphorus-doped silicon wafers under a zero-critical-metal policy that excludes indium and minimizes silver. Cells are produced in cleanroom environments through surface preparation, junction formation, antireflective coating, and metallization processes, and serve as the core semiconductor input for the company's own photovoltaic modules and for European solar module assembly.
- Photovoltaic Modules Photovoltaic modules (solar panels) assembled by HoloSolis from its TOPCon cells via a 10-step automated process including cell cutting, interconnection, lay-up, encapsulation, lamination, frame assembly, junction box installation, inspection, sorting, and packaging. Designed for residential, commercial, and utility-scale solar installations across Europe, with target full-scale output of 10 million modules per year equivalent to powering 1 million homes.
Quantifiable outcome
- 5 GW annual production capacity powering 1 million European homes
- +3 more outcomes
Companies that use Holosolis
Customer profileSegments2 records
Ideal customer profiles1 record
Holosolis technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Holosolis partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered flagship, core and supporting.
- Fraunhofer ISEflagshipEurope's largest research institute for solar energy systems located in Freiburg, Germany with 1,400+ employees. Unveiled the TOPCon N-type architecture concept to the public in 2013. Expert across entire PV value chain and industrialization, supporting HoloSolis from factory design through ongoing R&D for cell and module improvements. Franco-German cross-border collaboration.
- CEA INESflagshipNational Solar Energy Institute located in Bourget-du-Lac, Savoie, France. World-leading in advanced photovoltaic R&D, grid integration, and smart energy management. Combines CEA teams with Savoie Mont Blanc University and CNRS research units. Piloting research through LITEN technology institute, bringing expertise from proof of concept through industrial transfer.
- TrinasolarcoreTechnical partner providing photovoltaic technology expertise and solutions. World leader with 260+ GW of modules delivered globally, bringing established solar technology and manufacturing knowledge to the partnership.
- Grand Est RegionsupportingNortheastern French region covering 9 departments including former Alsace, Lorraine, and Champagne-Ardenne. Strategic cross-border position supporting the project with regional development initiatives.
- Communauté d'Agglomération Sarreguemines ConfluencessupportingAgglomeration of 38 communes with 67,000+ residents centered on Sarreguemines at French-German border. Strategic cross-border position facilitating exchanges and supporting gigafactory establishment.
Scale indicators8 records
Recent moves1 record
Expansion highlights5 records
Holosolis competitors and assessment
Company assessmentMarket position
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Holosolis social profiles
Digital presenceHolosolis financial estimates
Financial estimateRevenue estimate
Valuation estimate
Holosolis leadership team
Management profileNumber of profiles
Profiles7 records
Holosolis funding detail
Funding detailFunding overview
Funding rounds4 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Holosolis M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Holosolis
What does Holosolis do?
HoloSolis manufactures high-efficiency N-type TOPCon photovoltaic cells and assembles them into finished photovoltaic modules at a planned 5 GW gigafactory in Sarreguemines-Hambach, France, targeting 10 million modules per year at full capacity. Production is vertically integrated into separate cleanroom cell and module lines, with cell manufacturing centered on tunnel oxide passivated contact architecture that excludes indium and minimizes silver use. The output is sold to European utilities, solar project developers, and energy companies seeking domestically produced, low-carbon solar modules.
Is Holosolis a public or private company?
Holosolis is a private company. It is classified as venture growth investor backed and is currently operating.
When was Holosolis founded?
Holosolis was founded in 2023. It employs 11 to 50 people.
Where is Holosolis based?
Holosolis is headquartered in Paris, France, in the Europe region.
How does Holosolis make money?
One revenue line is on record: solar Module Sales.
Does Holosolis have an API?
No public API is recorded for Holosolis.
What industry is Holosolis in?
Holosolis's product category is Solar Photovoltaic Manufacturing. Its primary akta.pro industry code is EUAMAHAA, Solar PV Module & Cell Manufacturing (Crystalline, Thin-Film), with a secondary code of EUAMABAD, Solar PV Module Manufacturing (Cells, Modules, Thin-Film). Its NAICS code is 334419 and its SIC code is 3674.