We’re here for you

+49 89 673 592-555

Personal advice, update service, checking the installation situation or repairs: Just arrange an appointment!

Contact by e-mail

[email protected]

Our service centre opening hours:
Mon – Thu 09:00 – 15:30
Fri 09:00 to 14:00

Dealer search

We sell our EFOY products worldwide through an authorised dealer network.

To the dealer search

Model check

We’ll help you choose the right EFOY fuel cell model and lithium battery.

To the model check

Service request
about your product

Do you have a specific question about your product or would you like to send it to our technical service team? Simply fill out our service request form.

Service request


We provide a warranty for your EFOY products. Detailed information about the warranty in your country can be found here and in our download area.

More about the warranty

Firmware updates

We are constantly working on improving our products and offer you free firmware updates.

Firmware update


Flyers, certificates, data sheets, instructions, warranty provisions, etc. can be found in our download area.

To the downloads


All answers to frequently asked questions can be found in our FAQ area:

Questions & answers

Service tool

Have you received a message from your fuel cell and would like to know what it means and how you can correct the problem?

To the service tool

Contact form

For contact requests you can also use the contact form on our contact page.

To the contact form

EFOY Newsletter

You will always be up-to-date with the EFOY Newsletter. Subscribe now and be the first to know when there is any news!

to the Newsletter

We are happy to help you personally!

+49 89 673 592-555

Contact form