H2Gremm

What H2Gremm does

H2Gremm is a French low-carbon energy technology company founded in 2019 and headquartered in Édern, Brittany, that designs and manufactures integrated on-site hydrogen production, compression, storage, and distribution systems. The company sells two core products under the Quokka® brand: Quokka® H, an energy storage system for residential and commercial buildings that combines daily electrochemical battery storage (15-40 kWh) with seasonal hydrogen storage (200-2500 kWh) to convert solar surpluses into storable hydrogen; and Quokka® M, an autonomous refueling station for hydrogen mobility fleets producing 1-10 kg of H2 per day at 450 bar. Its technology stack centers on renewable-powered electrolysis, a patented electrochemical compressor that the company claims reduces maintenance costs versus mechanical alternatives, steel-cylinder storage, and a connected energy management dashboard for real-time monitoring.

H2Gremm holds 4 international patents covering hydrogen production, compression, and storage, and has obtained CE marking (2023), ISO 9001:2015 certification from Bureau Veritas (signed 2024, certified 2025), and a Solar Impulse Foundation Efficient Solution Label. Manufacturing is conducted in France with European suppliers, and the company operates a second site at the ESTIA engineering school campus in Bidart as part of the SharedH2 SUDOE Interreg project. The company's technology has been demonstrated in high-profile reference deployments including three hydrogen refueling stations for forklifts and bikes deployed with Toyota at the 2024 Paris Olympic Games, and on-site production of hydrogen used to refuel a Toyota Mirai directly from photovoltaic panels.

The company generates revenue through one-time hardware sales of Quokka systems supplemented by installation and maintenance services. It sells primarily via direct sales, augmented in 2025 by a network of manufacturer and installer partners, and serves four primary segments: individual homeowners with solar installations, professional/business users seeking energy autonomy, communities and local governments pursuing energy sovereignty, and mobility fleet operators (bikes, forklifts, light commercial vehicles, drones). H2Gremm is backed by regional and public investors including BPI France, Crédit Agricole Unexo, CIC, and BPGO following a €7 million funding round in December 2023.

Name

H2Gremm

Legal name

H2GREMM SAS

Website

http://www.h2gremm.com

Company type

Private

Founded year

2019

Operating status

Operating

Headcount range

11–50 employees

Short description

H2Gremm designs and manufactures on-site hydrogen production, compression, and storage systems under the Quokka® brand, serving residential, commercial, and mobility fleet customers in Europe. It sells hardware and services for building energy autonomy and clean hydrogen vehicle refueling.

Ownership category

akta.pro rank

Product category

Hydrogen Energy Systems

NAICS

Air and Gas Compressor Manufacturing (333912)

SIC

Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Hydrogen Energy Storage & Power-to-X Equipment (electrolyzers, storage, fuel cell systems) (IMAGAHAM)

akta.pro secondary industries

Hydrogen (Industrial & Mobility) (IMAEACAB), Hydrogen Storage Terminals, Depots & Bulk Logistics (Siting, Loading/Unloading) (EUAFAEAI)

Keywords

• Hydrogen energy systems
• Green hydrogen production
• Hydrogen refueling stations
• Building energy storage
• Renewable energy autonomy

Headquarters

HQ city

Édern

HQ country

France

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Technology or R&D, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Hydrogen Energy Systems (QUOKKA® H and M): Sale of complete hydrogen production, storage, and distribution systems for buildings and mobility applications. Systems are customized based on energy needs (200-2500 kWh seasonal storage for buildings, 1-10 kg/day for mobility). Revenue is generated through one-time hardware sales with associated installation and maintenance services.
2. Professional Services: Implementation, installation, and maintenance services for hydrogen energy systems. The company operates a production facility in France and partners with manufacturers and installers for deployment.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

H2Gremm designs, manufactures and sells integrated low-carbon hydrogen energy systems that produce, compress, store and distribute hydrogen on-site under the Quokka® brand. Quokka® M is an autonomous refueling station (1–10 kg H2/day, 450-bar storage, 1–5 m² footprint) for hydrogen-powered vehicles, bikes, forklifts and drones; Quokka® H is a building/home energy storage system combining 15–40 kWh daily electrochemical batteries with 200–2,500 kWh seasonal hydrogen storage fed by photovoltaic electricity. Customers receive the equipment, installation services, a connected real-time monitoring platform, and ongoing maintenance.

Product overview

H2Gremm offers two core products under the Quokka® brand: Quokka® M (Mobility) and Quokka® H (Home & Building). Quokka® M is an autonomous hydrogen refueling station for vehicles and fleets, producing and storing hydrogen on-site. Quokka® H is an energy storage system for buildings, combining daily electrochemical battery storage with seasonal hydrogen storage to achieve year-round energy autonomy from solar installations. Both products are designed and manufactured in France (Brittany) and form an integrated ecosystem for local hydrogen energy production and distribution.

Differentiator

Problem solved

Functional benefit

Brands

• Quokka® H: Hydrogen energy storage system for homes and buildings enabling full year-round energy autonomy
• Quokka® M

Products and services

• Quokka® M Hydrogen Mobility Station Autonomous on-site hydrogen refueling station that produces, compresses (to 450 bar via a patented electrochemical compressor), stores in steel cylinders, and dispenses hydrogen for hydrogen-powered vehicles, bikes, forklifts, drones, taxis and ambulances. Scalable from 1 to 10 kg H2 per day on a 1–5 m² footprint with a 20+ year lifetime, sold to mobility-fleet operators and partners via direct sales with custom quotes.
• Quokka® H Home & Building Energy Storage Building- and home-scale energy storage system that combines 15–40 kWh daily electrochemical battery storage with 200–2,500 kWh seasonal hydrogen storage (produced via on-site electrolysis and stored at 300 bar in steel cylinders), releasing electricity via a fuel cell. Targets individual homeowners with photovoltaic installations, commercial buildings, and municipalities seeking year-round energy autonomy with zero lithium, silent operation and zero direct emissions.

Quantifiable outcome

• Reduces solar energy waste from less than 40% self-consumption to near 100% utilization through seasonal hydrogen storage
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

17 partnerships are on record, tiered core, flagship and supporting.

• ESTIAcoreStrategic or Co-development Partner · 1 January 2025Engineering school partnership to develop and deploy green hydrogen production station at Bidart campus. ESTIA is the first French engineering school to integrate hydrogen production station within local renewable energy microgrid. Part of SharedH2 SUDOE project.
• ToyotaflagshipStrategic or Co-development Partner · 1 January 2024Partnership for 2024 Paris Olympics to deploy 3 hydrogen vehicle refueling stations for forklifts and hydrogen bikes. Also demonstrated refueling of Toyota Mirai using hydrogen produced on H2Gremm's own site from photovoltaic panels.
• France HydrogènecoreStrategic or Co-development PartnerIndustry association partnership for hydrogen ecosystem positioning and development
• CEAcoreTechnology or IntegrationTechnical collaboration on hydrogen energy modeling and simulation since 2020
• EstiacoreTechnology or IntegrationEngineering school collaboration on hydrogen technology development and deployment
• S2E2coreStrategic or Co-development PartnerCompetitiveness cluster partnership for innovation and industry development
• Interreg SUDOEcoreStrategic or Co-development PartnerEuropean regional development fund project - SharedH2 SUDOE for hydrogen platform deployment
• CD2EsupportingStrategic or Co-development PartnerSustainable development organization partnership
• Le Coq VertsupportingStrategic or Co-development PartnerGreen business network partnership
• La French FabsupportingStrategic or Co-development PartnerFrench manufacturing ecosystem partnership
• Bretagne Développement InnovationsupportingStrategic or Co-development PartnerRegional innovation development agency partnership
• ATEEsupportingStrategic or Co-development PartnerTechnical energy association partnership
• TechnopolesupportingStrategic or Co-development PartnerTechnology park network partnership
• TRECOBATcoreImplementation/ SI/ Consulting PartnerConstruction company partnership for connected and autonomous home solutions with solar panels and H2Gremm energy storage integration
• ID4 MobilitysupportingStrategic or Co-development PartnerMobility innovation partnership
• UBO et UBSsupportingTechnology or IntegrationUniversity partnerships (Université de Bretagne Occidentale and Université de Bretagne Sud) for research and development
• PragmasupportingTechnology or IntegrationTechnical integration partner

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Lhyfe: French green hydrogen producer and on-site hydrogen production operator; overlaps with H2Gremm on electrolyzer-based hydrogen supply for mobility and industrial customers in France and Europe.
• McPhy Energy: French hydrogen equipment company specializing in electrolyzers and hydrogen refueling stations; competes head-on with H2Gremm's Quokka M in producing on-site green H2 for mobility.
• HDF Energy: French pioneer in hydrogen microgrids combining renewables, storage and fuel cells; comparable to H2Gremm's integrated building-and-mobility hydrogen microgrid concept.
• Home Power Solutions: German provider of year-round home energy autonomy via solar-to-hydrogen storage; competes directly with H2Gremm's Quokka H on residential seasonal hydrogen storage.

Broad incumbents

• ITM Power: Established PEM electrolyzer manufacturer deploying hydrogen production and refueling systems across Europe; a broader incumbent in the same on-site hydrogen equipment category as H2Gremm.
• Nel ASA: Global electrolyzer and hydrogen refueling station supplier; overlaps with H2Gremm on on-site hydrogen generation and fueling infrastructure for mobility customers.
• Plug Power: Large US hydrogen fuel cell and green hydrogen producer with a broad mobility and stationary portfolio; competes with H2Gremm on forklift hydrogen fueling and building-scale hydrogen solutions.
• Ballard Power Systems: Fuel cell manufacturer serving mobility and stationary power markets; relevant peer to H2Gremm given its fuel cell component within Quokka H and broader hydrogen stack focus.
• Cummins Accelera: Cummins' zero-emission business unit including electrolyzers and fuel cell systems; broader incumbent in on-site hydrogen production and stationary power similar to H2Gremm's offerings.
• Sunfire: German electrolyzer and Power-to-X company producing industrial-scale green hydrogen equipment; a broader incumbent in the same hydrogen production technology category as H2Gremm.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/h2gremm
• Xx.com/H2Gremm

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds1 record

Investors4 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about H2Gremm