The installation location of the gas filling station must be adequately secured to ensure static stability.

The floor area at the dispensing point must have sufficient electrostatic conductivity (resistance < 10^8 ohms) and be made of non-combustible material.

There must be no other equipment in the area where the system is installed that could cause a dangerous interaction.

The installation location of the hydrogen gas filling station must be selected so that the outer edges of the installation area are sufficiently far away from sources of danger. According to the safety concept, a minimum distance of 5 m for installation must be maintained or as prescribed by the licensing authority. Sources of danger include, for example, street lamps, open flames, heat sources of any kind, exposed electrical equipment, or similar.

Provisions should be made to ensure that the access and exit points are separated from each other. Road vehicles can enter the site forward and approach the refueling station forward. After refueling, the mobile filling station can be exited in the direction of travel. The station is located outdoors, i.e., it is not enclosed and is permanently ventilated.

Unless the mobile filling system is installed on a restricted-access site, it is necessary to provide the hydrogen gas filling system with a closed, perimeter security fence to protect it from unauthorized use and to prevent tampering.

A speed bump must be installed before entering the safety zone to reduce speed. Furthermore, one-way and speed limit signs must be installed.

For each new installation location, the potential hazards posed by mechanical impacts on the mobile hydrogen gas filling station must be assessed, taking local conditions into account. This assessment must be documented and presented to the authorized inspection body’s representative during the respective pre-commissioning inspection. If the results of this assessment indicate that the system is not adequately protected against mechanical impacts, collision protection must be installed in accordance with VdTÜV 965 Part 1 – 3, in particular Part 3: Requirements for Gas Stations and Filling Stations Not Accessible to the Public. Evidence of adequate design and installation of the collision protection must be presented to the authorized inspection body’s representative.

The lighting of the filling station’s operating area must be ensured at each new installation location. Gas filling stations must be adequately lit for their intended use. The illuminance at the dispensing device must be at least 100 lux. Proof of this must be presented during the pre-commissioning inspection.

Hydrogen storage (cylinder bundles) is not covered by this offer. Reference is made to the requirements of TRBS 3145, “Mobile Compressed Gas Cylinders – Filling, Holding Ready, In-House Transport, Emptying.” Sufficient space must be provided for the exchange of fuel storage units (cylinder bundles).

The system, consisting of cylinder bundle(s) and filling station, must be grounded. A measurement report must be submitted for inspection before commissioning.

A lightning arrester system must be installed in accordance with TRGS 727.

The total resistance should ideally not exceed 10 ohms. Therefore, a conductor made of copper and galvanized steel with a minimum cross-section of 16 mm² must be used at this point.

An explosion protection document must be prepared for each installation site, adapted to the current state of technical regulations. In particular, the current version of TRGS 751 must be taken into account.

The explosion protection zone must not extend to adjacent properties.

The explosion-hazardous areas around the vents of gaseous hydrogen system components must be identified and defined on a case-by-case basis as part of the risk assessment using a suitable calculation method.

The explosion zones and the corresponding hazard warnings and prohibitions must be prominently and permanently displayed on the mobile gas filling station (safety signage).

No non-explosion-proof equipment, e.g., lighting, may be installed in the designated Ex zones.

A site-specific fire protection plan must be developed for each new installation location and coordinated with the local building inspectorate and the fire department. Fire loads within the area of ​​the system (within a 5-meter radius) are prohibited. Due to the presence of a discharge device, two fire extinguishers of fire classes A, B, and C must be available. The extinguishing capacity of each fire extinguisher must be at least 6 extinguishing agent units according to ASR A2.2.

The hydrogen gas filling station is operated without supervision. The dispensing device may only be operated by trained personnel.

Employees/operating personnel must be trained before starting work and at appropriate intervals, but at least annually, regarding:

• the specific hazards involved in handling compressed gases
• the safety regulations, in particular the applicable recognized technical rules
• the measures to be taken in the event of malfunctions, damage, and accidents
• the handling of fire extinguishing equipment and protective equipment
• the operation and maintenance of the gas filling station based on the operating instructions

A record of the training must be kept.
Employees/operating personnel must confirm the training with their signature.

Further requirements are addressed by the following measures:

Preparation of an alarm and action plan for accidents caused by leaks, in coordination with the responsible authorities
Preparation of an operating manual containing a monitoring and maintenance plan