Applications

New decentralized, flexible and decarbonized energy services

Elhytec solutions pave the way for a new generation of energy services, designed to meet the challenges of the energy transition: service continuity, local autonomy, excess power valorization, technological sobriety, and operational safety.

Thanks to its two technological variants, Elhytec addresses a variety of needs. Each solution is modular, safe, pressure-free, lithium-free, self-discharge-free, and independent of complex logistics or critical technologies.

Three use cases illustrate this service-driven approach

 

1.Backup electricity for telecom towers

Hydrogen gensets, powered either by a fuel cell or a hydrogen internal combustion engine, offer an alternative to traditional diesel generators, which are noisy and polluting.
However, current hydrogen systems rely on pressurized hydrogen supply chains—whether through logistics or on-site production—which are regulated, complex, and costly.

ElhyPower offers a safe, long-duration storage solution without gas/pressure, and allows on-demand release of hydrogen/electricity via a fuel cell or H₂ engine. Then the system supports local electrical recharge via renewable or grid input.

ElhyPower can also be scaled and adapted for other critical backup needs:

  • Healthcare facilities
  • Defense infrastructure
  • Intermittent or weak power grids
  • Data centers

Initial specification:

  • Storage capacity: 750 kWh (equivalent to 50 kg of H₂)
  • Discharge power: 10 kW
  • Autonomy: 24 to 72 hours
  • Format: 20-foot container

 

2. Hydrogen inflation for tethered balloons

Tethered balloons are increasingly used for high-altitude observation and communication.
Shifting from helium (rare, expensive, and fossil-based) to hydrogen brings many advantages — but also key technical requirements:

  • Safe and simple operation, even in remote or sensitive environments
  • Fast inflation on demand, aligned with mission cycles,
  • Guaranteed hydrogen availability

Current solutions are often inadequate:

  • Compressed gas requires heavy, regulated logistics
  • Conventional electrolyzers are oversized or coupled with pressured gas storage
  • Chemical generators use non-sustainable materials and may pose risks (high temperature/pressure, Atex configurations, hazardous substances…)

The ElhyGas hydrogen generator provides a secure and innovative solution, usable on any type of site.
It allows deferred hydrogen storage and rapid release for balloon inflation.

It is a compact, cost-effective system, based on mass-produced industrial equipment, and intrinsically safe by design.

ElhyGas is suited to stratospheric balloon missions, but can also serve other technical or industrial needs:

  • Test benches, technical centers
  • Low or discontinuous hydrogen demands (e.g. furnace filling)
  • Sites with logistical or regulatory constraints (military applications…)

 

Initial specification:

  • Hydrogen output: 50 to 600 grams every 4 hours
  • Discharge rate: 100 grams in 2 minutes
  • Equipment volume: 100 to 1,500 liters

 

 

3. Long-Duration Energy Storage

The energy transition requires new storage capabilities to absorb and valorize excess decarbonized electricity, and to release energy several days or even weeks later, safely and cost-effectively — as a complement to lithium batteries, which are suited for short-term storage.

ElhyStore is a modular, long-duration energy storage solution, free of gaseous hydrogen and lithium. It provides flexible energy output in the form of gas, heat, or electricity, depending on the configuration.

 

Key benefits for new energy use cases:

  • Infra-weekly storage: capture weekend surpluses for weekday use
  • Near-seasonal storage: store solar or wind excesses over several weeks
  • Enhanced self-consumption: for commercial buildings, industrial sites, or community-scale systems

A modular and scalable system:

  • Pilot modules: Recharge 10 kW / Storage “equiv. 50 kg H₂” / Discharge 5 kW
  • Scale-up: Recharge 1 MW / Storage “1 ton H₂ equivalent” / Discharge 15 kg/h
  • Decoupled sizing of recharge, storage, and discharge for optimal techno-economic performance

A safe and regulation-friendly alternative:

  • No lithium: eliminates thermal runaway risks
  • No gaseous storage: no pressure, no Seveso classification
  • Buryable  or adatable to constrained environments

 

 

 

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