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H2PS-5 is a combined heat & power CHP System. It has a capacity of 5 kW electric power, while in the combined heat and power (CHP) mode, it can also produce up to 7 kW thermal energy in the form of hot water.

The system is multi-fuel fed, i.e. it can operate with either Natural Gas, Propane/LPG or Biogas, converting it to electrical power through an intermediate production of hydrogen using a Proton Exchange Membrane Fuel Cell (PEM-FC).
The unit is equipped with a power management system, delivering electrical energy in the form required (DC or AC, grid connected or stand alone), depending on application. It has the ability to operate in the range of 40-100% of its nominal capacity. Its electrical efficiency is greater than 35% (based on LHV), while total efficiency exceeds 85%.

The integrated system consists of the following sub-units:
• Fuel processor/hydrogen production unit, where hydrogen production takes place via the reformation of the feeding fuel
• Low temperature PEM fuel cell stack, where power production takes place using the produced hydrogen from the fuel processor
• Batteries and electronic power management systems, where the excess produced power is managed
• Control system, capable to control the unit and to achieve proper, smooth and safe operation of the H2PS-5 product

H2PS-5 based on highly innovative and efficient technologies, which have been developed in recent years by Helbio S.A. The key technology and innovation pertains to an integrated approach of the reforming reactor and the required catalyst. This has resulted in the so-called Heat Integrated Wall Reactor (HIWAR)which offers significant advantages over conventional reactors/catalysts: very rapid heat transport, very small quantities of catalyst required, very compact, enhanced safety, high power to volume ratio and lower operating temperatures. H2PS-5 uses PEM-FCs coupled with a fuel processor based on a reforming step in advance.

The system comprises a reforming step and a power generation step.
Firstly the reformer stage:
It produces hydrogen and carbon monoxide.
The following reactions take place in the reforming step:
Steam Reforming:
CnHm + H2O = nCO + (n+m/2)H2
Water Gas Shift (HT and LT WGS):
CO + H2O = CO2 + H2
CO + 3H2 = CH4 + H2O
Secondly the power generation stage:
A low temperature Proton Exchange Membrane (PEM) fuel cell is used.


> Electrical efficiency is greater than 35% (more than twice the efficiency of common diesel generators)
> Operating cost (Fuel) is more than 2 times lower than that of a conventional diesel generator
> Maintenance cost is expected to be reduced to less than 50% compared to the maintenance cost of conventional power generators due to simplicity of construction
> Multifuel system, operating with Natural Gas, Propane / LPG or Biogas.
> Dramatically reduced emissions Prometheus 5 emits 170 times lower amounts of NOx and HC, 27 times lower amounts of CO and zero amounts of Sox)
> Very low noise and vibration levels
> Improved safety (no ames)
> Excellent performance at partial loads
> Capable to operate with raw biogas


Telecommunication stations

Telecommunications providers rely on backup power to maintain a constant power supply and to ensure the operability of cell towers. In telecommunication stations, H2PS-5 offer many advantages which include reliability, low maintenance costs, reduced frequency of refueling and reduced cost.

On- or off- grid households and other buildings

Main benefits of using H2PS-5 include: energy savings due to high electrical and overall efficiency, reduced (or zero, depending on fuel) CO2 emissions, essentially elimination of emissions of atmospheric pollutants such as NOx, SOx and particulates, and dramatically reduced noise and vibration level.

Sailing yachts and boats

Βoats longer than 10m need a supplementary power generator for power and/or heat production when docked or in the occasion of failure of the main engine.H2PS-5 offers the same attractive characteristics as in any other mobile application: reliable, economic, quiet, vibration free, and emission free operation.


The market for Auxiliary Power Units (APU) for trucks represents an interesting potential opportunity for fuel cell power systems. Replacement of diesel engines with H2PS-5 power system will result in significant fuel savings, drastically reduced emission of pollutants and significantly quieter operation.

Small-size farms with biogas availability

Future and developing markets for H2PS-5 include small biogas producers in farms, food industries and food chains. In the biogas field, conventional technologies suffer from unreliable and interrupted operation due to the low heating value of the fuel, issues which are not important in H2PS-5.


Power production unit

Rated power production: 5 kW
Max. electrical efficiency: 35 %
Max. total efficiency: 85 %
Power characteristics: 48 VDC
Rated heat production (hot water @70 °C): 6 kW
Operating range: 40 - 100 %
Utilities specifications and consumption, at full load:
    •    Natural gas @ rated capacity (>91% CH4): 1.3±5 % Nm3/h
    •    Parasitic power consumption: <0.7 kW
    •    De-mineralized water: 4.9±5 % l/h
    •    Water specific conductivity
Materials of construction for all unit’s versions:
    •    vessels: heat resistant stainless or lower grade stainless steel
    •    piping: stainless steel, painted carbon steel or plastic
    •    supporting structure painted carbon/stainless steel

Containers & control cabinet

Dimensions: 65 x 70 x 160 cm
Weight: 200 kg
Ambient operating temperature: 4 - 40 °C
Corrosion protection: outdoor paint
Protection grade: IP30

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