Fuel Cells

Solar Energy


* The energy that the sun continuously irradiates on the earth is equal to 10.000 times the worldwide energetic requirements!

* Between all the energetic sources available to us, the sun represents the more long-lasting energetic source by far, with a life expectation of billions of years.

* Demand for solar cells is unquestionably robust, the price of oil is trending higher, and solar tax credits will likely be extended.

* Solar energy continues to show the most momentum of all the alternative energy segments.

* The use of solar energy is versatile; it is used for electricity, central heating, hot water, cooking, for producing salt and even for desalination

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Reliable Mobile Energy - Power where it's required

Please use our contact page to request technical details and our low prices.


Finding reliable energy for remote applications can be a real challenge. Batteries are heavy and go dead quickly, so they don’t provide a long-term solution. Generators are noisy, dirty and require lots of maintenance. The default solution is solar modules. Once installed, they deliver electricity courtesy of the sun. There's one problem though: when the weather's bad, power production drops dramatically and devices may stop operating. That's why solar modules often need to be oversized and equipped with large batteries to make sure that they continue producing power even in bad weather.

How an EFOY Pro/solar hybrid system works

The EFOY Pro connects directly to the battery and monitors voltage continually. The fuel cell kicks in automatically only if output from the solar cells drops below a certain threshold, guaranteeing that the battery stays charged even in bad weather. Devices continue to run reliably, around the clock.


Robust and maintenance-free

Lightweight and compact

Quiet and emission-free

Automatically charges12 V and 24 V batteries

Hybrid compatible - ideal for combining with solar energy systems


100% reliable power around the clock, in any weather

The EFOY Pro/solar hybrid combines the best of both fuel cell and solar technologies.

Good weather - the sun

In a fuel cell/solar hybrid system, the solar module provides all the power when the sun is shining. The EFOY Pro remains in standby mode as long as the sun delivers free energy.

Inclement weather, darkness, winter - a fuel cell

In bad weather, solar cells can't deliver enough power and so, battery voltage drops. Once the charge falls below a certain threshold though, the fuel cell automatically cuts in, recharges the battery, and then returns to standby mode.


A hybrid system consisting of the EFOY Pro and a solar system offers cost advantages. You no longer have to construct oversize solar panels and you can keep battery size to a minimum.


An EFOY Pro/solar hybrid system is also economical. When the sun is shining, less fuel is needed. More importantly, though, you no longer have to replace batteries. That means lower personnel and logistical costs.

Easy to integrate

Use plug and play to integrate the EFOY Pro into new or existing solar systems.

EFOY Fuel Cell Pro 600 Pro 1200 Pro 1600
Charging capacity 600 Wh/day 1200 Wh/day 1560 Wh/day
Nominal output 25 W 50 W 65 W
Nominal voltage 12 V / 24 V 12 V / 24 V 12 V / 24 V

Nominal current
12 V / 24 V

2.1 A / 1.05 A 4.2 A / 2.1 A  5.4 A / 2.7 A
Weight 17.2 lbs 18.1 lbs 18.5 lbs
Noise emissions 23 dB(A) in 7 m distance
39 dB(A) in 1 m distance
Operating temperature

-20 to +45 °C
(-4 °F to +133 °F)

Nominal consumption* 0.9 l/kWh

Dimensions  (L x W x H)

433 x 188 x 278 mm
(17 x 8 x 11 in)


*Effective consumption depends on operating conditions

Fuel cartridge M5 M10 M28*


 5 liters
(1.32 gallons)

10 liters
(2.64 gallons)

28 liters
(7.4 gallons)

Weight 4.3 kg (9.5 lbs) 8.4 kg (18.5 lbs) 22 kg (48.5 lbs)



5.5 kWh


11.1 kWh 31.1 kWh


The EFOY Fuel Cell Offers:

Robust industrial construction

EFOY Pro are delivered in a robust metal casing. The integrated user interface allows monitoring and control directly on the unit.

More freedom when refuelling

EFOY Pro can be hooked up directly to all EFOY Fuel Cartridges. Selecting the optimum size of fuel cartridge for your requirements allows you to optimise the weight and operating time of your appliance.

More flexible installation in your appliance

EFOY Pro can be fitted in your appliance in a variety of ways. Thanks to the extended fuel cartridge hose, the positioning of the fuel cartridge can be chosen freely for example beneath the EFOY Pro.

One for all - charges 12 V and 24 V batteries

EFOY Pro are compatible with 12 V and 24 V batteries. The integrated charge control system identifies the battery in use and automatically adjusts the charge process accordingly.

EFOY Pro 1600 Longlife

EFOY Pro 1600 is optionally available as longlife version.
When purchasing a EFOY Pro 1600 Longlife you receive an extended term of guarantee.