This thesis explores the development and the diffusion of the charging infrastructure in Oslo and its surroundings. Due to the rapidly increasing demand for electric vehicles, which in turn generates a great need for charging infrastructure, the aim of this study is to identify barriers in the development- and diffusion processes. Furthermore, the thesis analyses the business cluster Electric Mobility Norway and seeks to explain how it contributes to the development and diffusion of charging infrastructure. In this regard, several actors have been interviewed and observed. Empirical data have been analysed through the use of the framework technological innovation systems. In light of the conducted data, it has been identified great uncertainty and a lack in cooperation between the actors, which slow down the development- and diffusion processes. Furthermore, it has been argued that the businesses cluster Electric Mobility Norway contributes positively to these shortcomings. In the virtue of being a cluster, EMN has the opportunity to reduce the uncertainty and facilitate an arena where actors interact and cooperate.