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With the EFOY fuel cell you always have your environmentally friendly power generator with you – in your motor home, on the boat, or in your shed or cabin.

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For which applications are EFOY fuel cells designed?

The EFOY direct methanol fuel cells are available as EFOY and EFOY Pro models with an output of up to 500 W, depending on the power requirement and usage requirements. Our EFOY and EFOY Pro models are designed for different purposes. The EFOY models are designed for temporary use with few operating hours and are used as a back-up power supply for grid-connected or solar-powered hybrid installations. The EFOY Pro series is ideal for continuous operation and can also be used in hybrid operation. With the EFOY Pro, you can operate your application completely independently, compensate for low solar power and use smaller solar modules.


The hydrogen fuel cell solution EFOY Hydrogen serves as a back-up power supply solution and is ideally suited for providing clean emergency power and off-grid applications instead of a conventional generator, e.g. in the following markets:

  • For almost all stationary and semi-mobile applications up to 10 kW

  • UPS (Uninterruptible Power Supply)

  • Backup Power Supply – Telecom/IT/Data Centers/Hospitals

  • Railway and transport control / substations

  • critical infrastructure

  • Energy, gas or water supply


The EFOY Pro and EFOY Hydrogen fuel cells have been developed and designed for commercial and professional use.

Is there a risk that the batteries will be deeply discharged?

No, as long as a fuel cartridge is connected to the EFOY Pro, the built-in deep discharge protection takes effect and also switches on in the "Off" operating mode to protect the batteries from deep discharge. An additional deep discharge protection between consumer and battery must be installed independently.

Can the EFOY be repaired in the event of a defect?

Yes, we will repair your device, please email for an RMA (return material authorization).

Can I also monitor the EFOY Pro remotely?

Yes, remote monitoring is possible with a modem. Contact us at for more information. 


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contact us at

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The EFOY Pro charges the batteries fully automatically. The integrated charge controller permanently monitors the charge status of the battery. When required, the EFOY Pro is started automatically and turned off again when the battery has been charged. This means not only will you always have full power reserves, but your batteries will also last much longer because continuous charging prevents deep discharge. 230 V devices can be operated when an inverter is used.

The EFOY fuel cells are based on DMFC (Direct Methanol Fuel Cell) technology. They generate power from the fuel in the fuel cartridge (methanol), complemented by oxygen from the air. Methanol is directly converted into power. In addition to power, all this creates is waste heat and water vapour with a little carbon dioxide. This is extraordinarily environmentally friendly.

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The fuel offers significant advantages for mobile and portable applications because the liquid alcohol methanol can be transported anywhere safely, conveniently and effortlessly in the practical EFOY fuel cartridges.

EFOY fuel cartridge data sheet.

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EFOY COMFORT fuel cells have been developed for the leisure sector and ensure a fully automatic recharge of the battery, e.g. in a motorhome, on a boat or in a cabin. As EFOY Hybrid Power, fuel cell and lithium battery are a perfectly matched energy package.

For industrial applications, EFOY Pro fuel cells are the ideal power generators. The EFOY Pro is used for on-board power supply in vehicles, as off-grid power supply, e.g. for monitoring systems, measuring stations, oil and gas and many other applications.

For the special requirements of military users and security applications, SFC Energy offers a special fuel cell portfolio as well as a coordinated power management system.

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