About the project
Hydrogen is produced on the premises of the Buchs waste incineration plant. Swiss-Japanese plant manufacturer Kanadevia Inova is building the first electrolyzer that uses electricity from the waste incineration plant to produce green hydrogen and oxygen. The oxygen is released into the environment, while the hydrogen is compressed and stored in special tanks. To this end, HZI is using an alkaline electrolyzer that produces 550 Nm³/h of green hydrogen at 350 bar. The power-to-gas plant also includes several filling stations.
The hydrogen plant helps to stabilize the power grid by converting excess electricity into hydrogen during periods of overproduction, thereby storing the energy. This means that renewable electricity producers (solar and wind power) do not have to be shut down when there is a surplus.
Rey Technology was commissioned to supply the supply container for the power-to-gas plant. Our project included the planning, delivery, and equipping of the special container, which weighs approximately 10 tons. The container was equipped with a double floor, medium-voltage disconnect switch, 700 kVA transformer, low-voltage main distribution board, air conditioning, and lighting.
The planning and layout of the container was particularly challenging. Many safety regulations and requirements had to be taken into account, e.g., a fireproof wall, an emergency exit concept, and the cable entries on site. The very short implementation phase of 6 months had to be used efficiently in terms of the delivery times for the container, transformer, and medium-voltage disconnect switch.
Advantages for the customer
- Minimization of energy loss by converting surplus electricity into storable hydrogen
- Stabilization of the power grid through the use of surplus energy
- Sustainable use of existing infrastructure for continuous energy production and storage
Control technology
- PROFINET coupling for data to the higher-level control system
Communication
- 3VA-line
- PROFINET
- Modbus TCP
PLC (SPS)
- SIEMENS SIMATIC S7-1512SP-1 PN
Numbers
- Weight of container including equipment: 10 tons
- Container dimensions: 40-foot container – 12.2 m
Services provided by Rey
- Implementation concept
- Electrical diagram with EPLAN P8
- Manufacture of switch cabinets
- Electrical installation
- Delivery, assembly, and connection work for control cabinets, containers, and transformers
- Software engineering PLC
- Factory acceptance test / site acceptance test
- Commissioning
- Documentation / On-site training








