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Power-to-gas technology allows water to be converted into hydrogen or methane by electrolysis and stored and transported using existing gas infrastructure. This means that excess renewable electricity produced on particularly windy days can also be stored for longer periods of time.


On the subject of power-to-gas

With power-to-gas, electricity is generated from hydrogen via chemical processes. Some of this can be fed directly into the gas network or converted into synthetic gas beforehand by methanation. If this process takes place using renewable energies, renewable gas is created that can be used in various sectors. In this respect, power-to-gas technology will be an essential infrastructural component of the future energy system.

From around 2035, PtG plants will be required on a significant scale. So far, however, there have mainly been small pilot plants (up to 10 MW). Various larger projects (e.g. Highbridge and Element One) with 100 MW systems each are still being planned. The development and construction of PtG plants on an industrial scale should, however, begin immediately. The transmission system operators (TSOs) offer to take over the construction and operation of PtG plants in regulated business in order to raise the technology and its scaling to the necessary level in a timely manner. In this case, the TSOs would provide the market with a conversion service for renewable electricity. The owner of the kilowatt hour of electricity would also become the owner of the kilowatt hour of gas - minus the conversion losses. The early expansion of PtG plants would be promoted by introducing a target value for the proportion of renewable and decarbonised gases in gas consumption. The TSOs therefore recommend the timely introduction of a “green gas quota”.

Further topics of the energy transition

#Sector coupling

#Green gas

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