How do I fill up with hydrogen?
At our stations there are two different tank couplings. In the movie we show how to refuel with both. You can also download the refuelling instructions as a PDF file here:
Our hydrogen stations are all similar, but have small differences depending on their manufacturer. What all stations have in common is a card reader
next to the fuel pump. The reader is either integrated into the dispenser or is very nearby. Insert your fuel card into the reader with the magnetic strip facing down to the right, and then simply follow the instructions on the display.
Remove the dispenser by lifting it upwards out of the slot and then moving it away in a downward direction. After you have opened the fuel tank flap and removed the tank lid, the dispenser nozzle can be placed on the vehicle’s tank nozzle.
There are two different types of coupling at our stations: either the tank coupling locks automatically, or the fuel nozzle has a lever for locking it into place. In the latter case, pull the lever upwards to lock the nozzle, and make sure that the locking ring is snapped forward on the tank coupling. Always check that the fuel nozzle is properly locked into place.
You can then start the refuelling process simply by pressing the green button on the dispenser. Don’t be startled – there is a test surge at the beginning, as the system tests whether the connection is secure and how much hydrogen is still in the tank. The refuelling process ends automatically and the green button lights up or stops blinking. Now you can release the locking device by activating the small crossbar on the fuel nozzle lever or by pressing the white button on the fuel coupling’s locking ring and pulling the ring towards you.
Hang the dispenser back into place, going from the top down. Please check that it is correctly engaged, otherwise the system will not be able to complete the refuelling process and prepare for the next refuelling. Now just close the fuel filler flap and enjoy your next 500-700 kilometres of emission-free driving!
Why does it hiss?
Your car and our dispenser communicate via an infrared interface. As soon as the tank hose is locked, the filling level of your tank is determined by a test surge. After a short pause, the refuelling process begins. Don’t worry about a hiss when the gaseous hydrogen is pressed into the tank and the hose tenses. In Linde systems, you can monitor the rising pressure in the tank via a pressure gauge on the side.
Replace the dispenser properly! Why this is so important.
Only when a refuelling process has been completed can the system begin to prepare for the next refuelling and build up the necessary starting pressure. A properly engaged dispenser is a prerequisite for this. Please be careful to do this after refuelling.
Is there a support hotline in case of problems or malfunctions?
We offer a 24/7 support hotline for all H2 MOBILITY stations: +49 800 400 20 23. Please use it only if there is a malfunction! If you require help or support at a station run by another operator, please contact the telephone number shown in the details window of the station.
Why does the refuelling take longer on hot days?
When refuelling an H2 vehicle, heat is generated as the pressure in the tank increases. For this reason, the hydrogen is pre-cooled before it is refuelled. At high outside temperatures, starting at about 28 °C, we slow down the cooling a little bit to better counteract the compression heat and the high outside temperature. Therefore the refuelling takes a little longer.
My car won’t fill up completely – What can I do?
The maximum filling level for vehicles can vary between individual H2 filling stations. Factors such as the outside temperature are also responsible for this. The average filling level is approx. 97 %. If your refuelling unexpectedly ends at less than 85 %, you can repeat the fuelling process. To do this, end the current refuelling process, including replacing the dispenser. Then restart the process by registering with your fuel card. If you still have difficulties, please contact the operator or the local support hotline.
Ice on the fuel nozzle – What does it mean?
Anyone who has ever inflated a bicycle tyre knows that it warms up as the pressure rises. We refuel hydrogen at 700 bar! The H2 is pre-cooled in our systems, to between -33 °C and -40 °C. So it can happen that ice forms on the nozzle when there is high humidity.
Difficulties when removing the fuel coupling
Our H2 systems are pre-cooled because refuelling under pressure generates heat. In some older systems, cooling may cause the coupling to briefly ‘freeze onto’ the car’s tank nozzle. If the coupling is stuck, simply push the coupling towards the car and then remove it. We are gradually retrofitting all older systems, as the problem has been eliminated in newer couplings.
How do I refuel hydrogen outside Germany?
At this point, the H2.LIVE/CARD is valid only in Germany, but we are working on introducing payment across borders. If you plan to travel abroad, we already have plenty of information available for you in the App/Web details window of the individual filling stations. We are also happy to provide information directly: Simply send us an enquiry with the destination country to firstname.lastname@example.org
. We will contact you with the country-specific details
Can I submit feedback about filling stations or any refuelling problems I experience?
We welcome and need your feedback! Please use the feedback section of our H2.LIVE app to submit your wishes, constructive criticism, suggestions for individual stations or about the hydrogen infrastructure in general. Or email us at email@example.com
. Thank you!
Where does the hydrogen at the hydrogen filling station come from, and how ‘green’ is it at the moment?
At H2 MOBILITY, we are building a nationwide hydrogen infrastructure for Germany because we believe that using hydrogen as a propulsion energy will significantly reduce road traffic-related emissions. To achieve the greatest possible effect here, our goal must be to offer hydrogen that is 100 % from renewable sources.
We already have facilities that offer hydrogen produced by water electrolysis (e. g. in Wiesbaden and Brunsbüttel), and as a company we are committed to ensuring a steady and rapid increase of these renewable sources of hydrogen in Germany. At present, however, it is still a great challenge to obtain sufficient green hydrogen. The reason is that there is simply not enough green hydrogen available. However, this will soon change thanks to national and international hydrogen strategies.
In 2020, the average share of green hydrogen in the grid was 28 %. It is produced from water electrolysis and from biomethane and biomethanol, and is certified green by TÜV. Our goal is to successively increase this share.
30 % of the H2 offered by H2 MOBILITY is by-product from the chemical industry that would otherwise go unused.
The remaining 42 % is (still) produced from natural gas. And though hydrogen produced from natural gas saves about 1/3 CO2 compared to conventional fuels, our clear goal remains: green hydrogen, preferably produced with electrolysis using renewable energies.
How much effort does it take, or how cost-intensive is it, to upgrade a conventional filling station with hydrogen dispensers and tanks?
So far, we have mainly installed S-size hydrogen filling stations. Here, 200 kg of hydrogen are stored for refuelling at 700 bar. That is enough to refuel 40 vehicles. Integrating this kind of filling station into a conventional station costs about 1.2 million euros.
Starting in 2021, we are also building larger stations that can supply commercial vehicles with hydrogen at 350 bar and hold 400-800kg of hydrogen. We estimate the costs here at 2.5 million euros. Construction takes between 12 and 20 months. Most of this time is taken up by the application and approval procedure. Apart from that, it is an engineering feat in which we now have the greatest experience worldwide.
To what extent is the expansion of hydrogen filling stations supported by the state or otherwise?
H2 MOBILITY receives funding from the Federal Ministry of Transport and Digital Infrastructure (BMVI) under the National Hydrogen and Fuel Cell Technology Innovation Programme (NIP), and from the European Commission as part of the Hydrogen Mobility Europe project, which receives funding from the Fuel Cells and Hydrogen 2 Joint Undertaking (FCH 2 JU, grant agreement no. 671438). The FCH JU is supported by the European Union’s Framework Programme for Research and Innovation (Horizon 2020), Hydrogen Europe, and the Hydrogen Europe Research Association.