Expanding cities need to cope with significant challenges to provide good mobility, while atthe same time minimizing congestion, emissions and noise. Compared to combustion vehicles,electric vehicles have higher energy efficiency, reduced local emissions and are quiet, and cantherefore ease the above challenges. Unfortunately, the energy density in batteries is relativelylow; therefore they would be both expensive and heavy to achieve a corresponding range ofconventional vehicles. This case study has therefore examined the possibilities, ambiguitiesand requirements for utilizing Gothenburg’s existing tram network as energy source foren-route charging of buses. A conceptual technical solution has furthermore been presented toenable the connection to the tram network. It is also recommended to implement smart controlof the vehicle’s energy consumption in order to optimize the network power utilizationwithout additional infrastructure investments.