Overview
HYWATT is a green hydrogen production system that combines eWATT thermal solar technology (capturing solar heat instead of light, achieving 60–70% efficiency) with water electrolysis to produce hydrogen as the primary output. Unlike conventional hydrogen production (steam reforming of natural gas, blue hydrogen with carbon capture), HYWATT produces hydrogen directly from solar thermal energy and water in a closed-loop process with zero emissions. Claimed cost: €0.2/kg hydrogen (vs. €6–8/kg market average), 2–3 year ROI, 60–70% system efficiency, no external electricity dependency, minimal maintenance, 20+ year lifespan. Applications: green hydrogen for transportation (trucks, ships), industrial processes, energy storage, grid stabilization.
Applications
Green hydrogen for heavy transport (trucks, ships, trains), industrial hydrogen demand (ammonia synthesis, steel production, chemicals), energy storage and grid balancing, fuel cell power generation, direct use in combustion engines (retrofit), hydrogen infrastructure development. Typical scenarios: coastal hydrogen hubs, industrial parks with hydrogen demand, transportation corridors. Users: hydrogen producers, fuel distributors, heavy transport operators, industrial manufacturers, energy utilities.
Operating Principle
eWATT core: Captures a broad band of infrared solar heat beyond the visible spectrum, rather than relying on visible light as photovoltaic panels do; converts that heat to electricity via a proprietary thermodynamic conversion process (~60–70% efficiency vs. 24% for silicon PV). HYWATT adds: Electrolysis of water using eWATT-generated electricity produces hydrogen and oxygen; hydrogen collected and pressurized for storage/transport; oxygen vented or used industrially; water recycled in closed loop (evaporation recovery). No external electricity grid needed; system self-sustaining from solar thermal input alone.
Key Parameters
| Parameter | Value |
|—|—|
| Solar Thermal Efficiency | 60–70% (heat to electricity) |
| Hydrogen Production Cost | €0.2/kg (vs. €6–8/kg market) |
| Hydrogen Output (per unit) | TBD per installation size |
| Electrolysis Efficiency | ~70–80% (water to H₂+O₂) |
| Overall System Efficiency | 42–56% (solar heat to H₂) |
| Capital Expenditure | 2–3× lower than silicon solar + hydrogen plant |
| Payback Period | 2–3 years |
| System Lifespan | 20+ years (no degradation from burnout) |
| Water Consumption | Closed-loop (minimal loss, recycled) |
| Maintenance | Minimal (no silicon degradation issues) |
| Operating Temperature | Moderate (no extreme heat exposure) |
| Scalability | Modular units, from small to utility-scale |
Architecture and Components
eWATT thermal solar collector (medium/far-infrared capture, heat engine), electrical generator (converts heat to 3-phase AC), inverter/power management, water electrolysis stack (PEM or alkaline), hydrogen compression/storage, oxygen handling (vent or recovery), water recycling system, control/monitoring unit, container or ground-based structure. Modular design allows stacking for higher hydrogen output. Can operate standalone or grid-connected.
Advantages
Technical: 60–70% efficiency (3× better than silicon PV for solar heat), no photon-dependent limitations, operates in all light conditions (heat available even on cloudy days), no silicon degradation, long-term reliability (20+ years). Economic: €0.2/kg hydrogen cost (game-changing for hydrogen economy), 2–3 year payback, minimal OPEX (no consumables, no reagents), lower CAPEX than alternatives, no transport cost penalty (produced on-site). Environmental: zero emissions (green hydrogen from solar + water), closed-loop water recycling, no fossil fuels, supports decarbonization. Strategic: energy independence, scalable globally, applicable to any location with solar access, reduces hydrogen import dependence.
Integrations
Green hydrogen supply chains, fuel cell systems (automotive, stationary), ammonia/methanol synthesis plants, steel/chemical manufacturing (hydrogen-based), grid energy storage (hydrogen as storage vector), renewable energy microgrids, maritime/aviation refueling infrastructure. Related: eWATT · Hydrogen Production · Thermal Solar · Fuel Cell Systems
Deployment & Operation
Path: eWATT thermal collector validation (eWATT at TRL 3) → hydrogen electrolysis integration → system commissioning → production ramp-up
Operating: Autonomous from sunrise to sunset (thermal solar resource available as long as sunlight present); optional battery/storage for continuous operation. Climate: operates in all conditions (thermal energy available even on cloudy days, unlike PV). Maintenance: annual inspection, filter cleaning (minimal).
TRL
TRL 3 (Concept validated, based on eWATT parent platform)
Evidence: eWATT thermal solar technology proven at lab scale, hydrogen electrolysis well-established industrial process, integration pathway defined, economic modeling completed, efficiency claims documented
Remaining: Demonstration unit integration (eWATT + electrolyzer together), field trial hydrogen output validation, efficiency confirmation under real solar conditions, hydrogen purity/compression validation, commercial prototype, manufacturing scale-up
Market Potential
Target: hydrogen producers, renewable energy developers, heavy transport operators, industries with hydrogen demand (ammonia, methanol, steel, chemicals), emerging hydrogen fuel infrastructure. Drivers: green hydrogen mandate in EU/USA, transportation sector decarbonization, hydrogen cost reduction needed ($2–3/kg target by 2030), renewable energy integration. Global hydrogen market: ~$150B annually; green hydrogen segment growing 20%+ per year. If HYWATT achieves €0.2/kg cost, could capture 10–30% of emerging green hydrogen market = $5–15B opportunity by 2035.
Risk Factors
Technical: eWATT efficiency claims (60–70%) require independent verification under real solar conditions, electrolyzer durability under continuous thermal-driven operation, hydrogen purity standards (compression, moisture), thermal losses in system integration. Market: hydrogen infrastructure immaturity (no widespread refueling network), competing hydrogen production methods (electrolyzer costs falling, steam reforming + CCS improving), scaling manufacturing of eWATT units. Regulatory: hydrogen safety codes, pressure vessel certifications, grid integration rules (if grid-tied).
Related Technologies
eWATT