Power to gas allows using excess renewable electricity to produce Hydrogen and to transform it to renewable methane. The latter step is the methanation which requires CO2 that can be taken from biogas plants, emissions from industrial plants or the atmosphere. The methane can be used to drive natural gas vehicles for transportation and mobility. The processes described use building blocks made of existing technologies, link the two major existing European energy distribution systems (i.e. the grids for electricity and natural gas) with each other and make large existing storage capacities accessible for renewable electricity. The system has the potential to make a huge contribution to the Swiss Energy Strategy 2050. However, many questions are unanswered: e.g. How and where to build the sub-systems, how to operate them, what are the business cases for the many players involved and what are the required political boundary conditions. This project aims to answer these questions with an interdisciplinary Team from an application and implementation point of view and wants to create the pre-conditions for the realization of renewable methane production for mobility.