The refuelling unit, the Everfiller, is a flexible and fully mobile hydrogen fuelling solution targeted at smaller vehicle fleets. The unit allows Everfuel to offer low hydrogen prices at lower volumes than a conventional filling station, and does not require long-term customer commitment, which is normally required for building a fixed station. The unit is fully mobile and can simply be rolled away when the fuelling period is finished, which allows Everfuel to offer much greater flexibility in terms of length and size of offtake commitment.

Smaller fuel-cell vehicle fleet owners have previously faced the challenge of costly investments in full-scale stationary stations and the need to commit to commit to long-term offtake, which does not always fit with the operator's business model. Many operators would however like to decarbonise their fleets by trying or adopting hydrogen fuel but have struggled to find a way over these hurdles. The Everfiller lowers these barriers and makes hydrogen fuel accessible for users with small depots or who wish to conduct small scale trials.

The simplicity of the design in the Everfiller limits maintenance requirements which provides high uptime and high availability whenever needed. The unit has three onboard integrated fuelling lines that can be directly filled from, which offers fuelling for up to three vehicles in parallel. The unit will in particular be beneficial in bus depots.

Discussions with prospective users of the Everfiller solution have generated a very warm reception to date, both due to the Everfiller's flexibility and its ability to significantly lower the cost of hydrogen for the customer with at least €1 per kilo. A number of Public Transport Operators, including German PTOs Regionalverkehr Köln GmbH (RVK), WSW mobil GmbH and In-der-City Bus (ICB), have expressed their enthusiasm for utilising the solution to fuel their vehicles and for participating in prototype testing.