H55
H55 is a Swiss electric aviation company that develops and manufactures certified electric propulsion systems and battery modules for aircraft, supplying OEMs like BRM Aero, Pratt & Whitney Canada, CAE, and Harbour Air with EASA-approved technology for CS-23 trainers and hybrid-electric regional aircraft.
- Company typePrivate
- Founded2017
- HeadquartersSion, Switzerland
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What H55 does
H55 S.A. is a Swiss electric aviation company founded in 2017 as a technological spin-off from the Solar Impulse project by André Borschberg, Sébastien Demont, and Gregory Blatt. The company engineers and manufactures certified electric propulsion systems (EPS) and Energy Storage Systems (ESS) for aviation, targeting CS-23 fixed-wing aircraft and scaling toward hybrid-electric regional applications. Its core technology features a patented cell-level battery monitoring architecture that enables individual cell protection, thermal runaway containment without propagation, and modular reuse across electric, hybrid, hydrogen-electric, STOL, VTOL, and regional aircraft configurations. H55 holds both EASA Design Organisation Approval and Swiss FOCA Production Organisation Approval for electric propulsion systems, and in December 2025 became the first company to complete EASA-supervised propulsion battery module certification tests.
The company operates a B2B OEM-embedded business model, selling certified battery modules and propulsion systems to aircraft manufacturers and operators including BRM Aero (Bristell B23 Energic trainer), Pratt & Whitney Canada (Dash 8 hybrid-electric demonstrator), CAE (Piper Archer conversion), Harbour Air (eBeaver), Smartflyer (SFX1), and Safran (motor integration). Revenue derives primarily from hardware sales of propulsion systems and battery modules, with the B23 Energic aircraft priced at approximately USD 500,000 per unit and over 100 orders secured. Geographic operations span Switzerland (Sion headquarters and production), Canada (Longueuil production facility opened August 2025), France (Toulouse subsidiary), and US commercial activity via the Across America demonstration tour. The company has raised approximately CHF 65 million across six funding rounds through July 2024.
H55 firmographics
Firmographics- Name
- H55
- Legal name
- H55 S.A.
- Website
- https://h55.ch
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- H55 is a Swiss electric aviation company that develops and manufactures certified electric propulsion systems and battery modules for aircraft, supplying OEMs like BRM Aero, Pratt & Whitney Canada, CAE, and Harbour Air with EASA-approved technology for CS-23 trainers and hybrid-electric regional aircraft.
- Ownership category
- akta.pro rank
H55 industry classification
Industry- Product category
- Electric Aviation Propulsion Systems
- NAICS
- Other Aircraft Parts and Auxiliary Equipment Manufacturing (336413), Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing (336415), Electrical Equipment Manufacturing (33531)
- SIC
- Aircraft Engines & Engine Parts (3724), Aircraft Parts & Auxiliary Equipment, Nec (3728), Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- Electric & Hybrid-Electric Propulsion (eVTOL/Regional) (IMABADAH)
- akta.pro secondary industries
- Energy Storage Software & Controls (EMS, monitoring, optimization, cybersecurity) (IMAGAHAJ), Thermal Management & Safety Systems (cooling, fire detection/suppression, venting) (IMAGAHAI)
Keywords
Where H55 is headquartered
LocationHeadquarters
- HQ city
- Sion
- HQ country
- Switzerland
- HQ region
- Europe
Offices4 records
Markets served
H55 business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure
Revenue model
- Electric Propulsion Systems (EPS): H55 sells complete electric propulsion systems including battery packs, motor, motor controller, pilot interface, and power controls to aircraft manufacturers and operators. The systems are sold as certified, production-ready solutions for new aircraft builds and retrofit programs. Revenue is generated through system sales with pricing based on aircraft type and configuration.
- Energy Storage Systems (ESS/Battery Modules): H55 supplies certified battery modules and energy storage systems as standalone products for aircraft integration. The Adagio propulsion battery modules are sold to OEMs and operators for integration into electric and hybrid-electric aircraft platforms. Battery deliveries and production-conforming systems are sold directly to aircraft manufacturers.
- Conversion Kits and Retrofit Solutions: H55 develops and supplies conversion kits for existing aircraft, such as the Piper Archer electric conversion program with CAE. These kits enable operators to retrofit conventional aircraft with electric propulsion, creating recurring revenue from kit sales and potential aftermarket services.
- Aircraft Sales (Bristell B23 Energic): H55's first customer application through BRM Aero results in sales of the fully electric Bristell B23 Energic aircraft. The aircraft offers up to 70 minutes of endurance including reserves, priced at approximately USD 500,000 starting price. First two years of production capacity have been sold out based on existing orders.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Multi-year contract | Bristell B23 Energic aircraft powered by H55 EPS |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels5 records
H55 product offering
Product offeringCore offering
H55 engineers, manufactures, and certifies Electric Propulsion Systems (EPS) and Energy Storage Systems (ESS) — including modular battery packs, motor controllers, and power management systems — for electric and hybrid-electric aircraft. The company's products are designed to CS-23 and CS-25 certification standards and are integrated as OEM-embedded propulsion solutions into aircraft such as the Bristell B23 Energic trainer, Piper Archer conversions, Dash 8 hybrid-electric demonstrator, and Harbour Air eBeaver commuter aircraft.
Product overview
H55 provides a modular, certification-grade electric propulsion ecosystem for aviation. The core offerings are the EPS55 Electric Propulsion System (90-104 kW) and the modular Energy Storage System (ESS) platform, which can scale from 48 kWh for trainer aircraft to 200 kWh for regional hybrid-electric demonstrators. The Adagio propulsion battery modules represent the certified battery component that has achieved industry-first EASA approval. These systems are integrated into customer aircraft applications including the Bristell B23 Energic trainer, Piper Archer conversion program, De Havilland Dash 8 hybrid-electric demonstrator, and Harbour Air eBeaver conversions. H55 is the first company to achieve both EASA Design Organisation Approval and Production Organisation Approval for electric propulsion systems, enabling it to provide complete certified solutions from battery modules through full aircraft integration.
Differentiator
Problem solved
Functional benefit
Products and services
- Electric Propulsion System (EPS)
- Energy Storage System (ESS)
- Adagio Propulsion Battery Modules
- Bristell B23 Energic (Electric Trainer Aircraft)
- Piper Archer Electric Conversion Kit
- De Havilland Dash 8 Hybrid-Electric ESS (200 kWh)
- Harbour Air eBeaver Conversion (De Havilland Beaver)
Quantifiable outcome
- 2,000+ hours of incident-free electric flight accumulated
- +5 more outcomes
Companies that use H55
Customer profileNamed customers6 records
Segments5 records
Ideal customer profiles3 records
H55 technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature4 records
H55 partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core, minor and major.
- Safran Electrical & PowercoreH55 signed agreement with Safran Electrical & Power to integrate Safran's EASA-certified ENGINeUS electric motor into H55's electric propulsion system powering the fully electric Bristell B23 Energic aircraft. The partnership targets the expanding electric pilot training market for CS-23/Part 23 aircraft (2-6 seats), with serial production scheduled to begin in 2027.
- Sia and CRIAQminorH55, Sia (management and transformation consulting firm), and CRIAQ announced collaboration supported by the Écoleader Fund to develop second-life applications for aerospace batteries. The project aims to create sustainable business models and promote circular economy practices for battery reuse, positioning Quebec as a leader in sustainable aerospace.
- Switzerland SailGP TeamminorH55 and Switzerland SailGP Team joined forces to explore knowledge exchange and technology collaboration around clean and energy-saving technologies. The partnership showcases sustainable mobility with B23 Energic performing flybys at the Rolex Switzerland Sail Grand Prix in Geneva, demonstrating Switzerland's leadership in clean innovation.
- SmartflyercoreSmartflyer and H55 announced partnership at Bern Airport during Electrifly-in Opening, with H55 supplying certified electric battery systems for Smartflyer's hybrid-electric SFX1 aircraft. H55's battery system will be the first to receive EASA certification, providing Smartflyer with enhanced performance and operational flexibility. First demonstrator flight planned for 2026.
- Elfly GroupmajorH55 and Elfly Group signed Memorandum of Understanding to introduce the BRM Aero B23 Energic to the Nordic market. Elfly Group acquired three B23 Energic aircraft through exclusive Founders' Edition launch program with delivery for 2026. Elfly Group serves as exclusive distributor for Norway, Denmark, and Sweden, including joint demonstration tour and maintenance training programs.
- Vmo Aircraft LeasingminorVmo Aircraft Leasing and H55 committed to developing leasing solutions for new clean aviation products. Teams from both companies engaged in providing leasing programs targeted to support the nascent market for financing electric aircraft, battery storage, energy and management systems. Collaboration leverages H55's technology with Vmo's aircraft leasing expertise.
- CAEcoreH55 partnered with CAE and Piper Aircraft to develop a conversion kit for in-service Piper Archer aircraft and bring an electric variant to market as a Supplemental Type Certificate. H55 designs and manufactures the aircraft battery system to support conversion of two-thirds of CAE's Piper Archer training fleet with electric propulsion.
- Pratt & Whitney CanadacorePratt & Whitney Canada selected H55 to provide the battery pack for the company's regional hybrid-electric flight demonstrator program. H55 is developing a 200 kWh Energy Storage System for the modified De Havilland Canada Dash 8-100 aircraft. The demonstrator targets 30% improvement in fuel efficiency using a parallel hybrid architecture combining a thermal engine and 1MW electric motor.
- Harbour AircoreH55 partnered with Harbour Air to produce battery packs for the conversion of Harbour Air's De Havilland Beaver fleet for regional commuter flights through a supplemental type certificate program, making it the first electric Beaver (eBeaver) commuter airplane.
- BRM AerocoreH55 and BRM Aero cooperate on development and production of the Bristell B23 Energic fully electric aircraft. BRM Aero manufactures the aircraft airframe while H55 provides the certified electric propulsion system. The aircraft is the world's first certified electric trainer aircraft in the CS-23 category with over 100 orders secured.
Scale indicators10 records
Recent moves11 records
Expansion highlights7 records
H55 competitors and assessment
Company assessmentEmerging players
- ZeroAvia: ZeroAvia is developing hydrogen-electric propulsion systems targeting the same regional aviation market (10-20+ seat aircraft) that H55's Dash 8 ESS addresses. ZeroAvia represents a competing clean aviation pathway with potentially longer range and faster refueling than H55's battery-electric solutions.
- Eviation Aircraft: Eviation is developing the Alice, a nine-passenger all-electric commuter aircraft. Eviation represents an emerging competitor in electric regional aviation and pursues a similar battery-electric pathway targeting regional airline customers that H55's programs also address.
- Pipistrel (Textron eAviation): Pipistrel, now part of Textron eAviation, produces the Velis Electro—the first EASA-certified electric aircraft. Pipistrel is a direct competitor in the electric trainer market and has achieved earlier type certification than H55 for trainer applications.
- Heart Aerospace: Heart Aerospace is developing the ES-30 electric regional aircraft (30-seat) targeting similar markets to H55's regional hybrid-electric programs. Heart uses battery-electric and hybrid configurations, competing for the same airline customers and regional aviation electrification opportunities.
- Wright Electric: Wright Electric is developing electric propulsion systems for commercial aircraft, including narrow-body ambitions. Wright competes with H55 in the electric aviation propulsion space and shares similar certification-driven go-to-market strategies.
- Bye Aerospace: Bye Aerospace manufactures the eFlyer family of electric training aircraft, directly competing with the Bristell B23 Energic in the pilot training market. Bye Aerospace targets the same flight school customers with similar operating cost and environmental value propositions.
Broad incumbents
- Pratt & Whitney Canada: Pratt & Whitney Canada is both an H55 customer (RTX Hybrid-Electric Dash 8 Demonstrator) and a broad aerospace propulsion incumbent with internal capabilities. PWC's hybrid-electric strategy positions it as both a partner for current programs and a potential competitor for future propulsion system integration.
- Safran Electrical & Power: Safran is a major aerospace propulsion incumbent with EASA-certified ENGINeUS electric motors that are being integrated with H55's ESS for the B23 Energic. Safran is both a partner and a potential competitor as OEMs evaluate integrated electric propulsion solutions from single suppliers.
- Rolls-Royce Electrical: Rolls-Royce is developing electric and hybrid-electric propulsion systems for aviation through its electrical division. As a broad aerospace incumbent, Rolls-Royce competes with H55 in supplying propulsion technology to aircraft OEMs while offering greater scale and resources.
Direct peers
- magniX: magniX develops electric propulsion systems and motors for aircraft, directly competing with H55 in the aviation EPS space. magniX has powered Harbour Air's eBeaver program (alongside H55) and is a leading competitor in electric aviation propulsion for regional and commuter aircraft.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks6 records
Key highlights7 records
Customer concentration
H55 social profiles
Digital presenceH55 compliance and trust
Trust signalCompliance4 records
H55 financial estimates
Financial estimateRevenue estimate
Valuation estimate
H55 leadership team
Management profileNumber of profiles
Profiles4 records
H55 subsidiaries and ownership
Company hierarchySubsidiaries2 records
H55 funding detail
Funding detailFunding overview
Funding rounds7 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
H55 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 H55
What does H55 do?
H55 engineers, manufactures, and certifies Electric Propulsion Systems (EPS) and Energy Storage Systems (ESS) — including modular battery packs, motor controllers, and power management systems — for electric and hybrid-electric aircraft. The company's products are designed to CS-23 and CS-25 certification standards and are integrated as OEM-embedded propulsion solutions into aircraft such as the Bristell B23 Energic trainer, Piper Archer conversions, Dash 8 hybrid-electric demonstrator, and Harbour Air eBeaver commuter aircraft.
Is H55 a public or private company?
H55 is a private company. It is classified as venture growth investor backed and is currently operating.
When was H55 founded?
H55 was founded in 2017. It employs 101 to 250 people.
Where is H55 based?
H55 is headquartered in Sion, Switzerland, in the Europe region.
How does H55 make money?
Four revenue lines are on record. Electric Propulsion Systems (EPS) is the primary driver. The others are energy Storage Systems (ESS/Battery Modules), conversion Kits and Retrofit Solutions and aircraft Sales (Bristell B23 Energic).
Who are H55's main competitors?
Emerging players on record are ZeroAvia, Eviation Aircraft, Pipistrel (Textron eAviation), Heart Aerospace, Wright Electric and Bye Aerospace. Broad incumbents are Pratt & Whitney Canada, Safran Electrical & Power and Rolls-Royce Electrical. magniX is listed as a direct peer.
Does H55 have an API?
No public API is recorded for H55.
What industry is H55 in?
H55's product category is Electric Aviation Propulsion Systems. Its primary akta.pro industry code is IMABADAH, Electric & Hybrid-Electric Propulsion (eVTOL/Regional), with a secondary code of IMAGAHAJ, Energy Storage Software & Controls (EMS, monitoring, optimization, cybersecurity). Its NAICS code is 336413 and its SIC code is 3724.