This thesis supports the transition to a fossil-free vehicle fleet at Omexom Stockholm Distribution Substation. By the end of 2025, the business unit (BU) has set two internal targets: 50% of its vehicles should be battery electric (BEVs), and at least 85% of diesel consumption should be replaced with the renewable fuel HVO100.

A case study approach was applied, combining quantitative and qualitative methods. The quantitative part involved mapping the current vehicle fleet and comparing costs for different vehicle alternatives. The qualitative part was based on interviews, field observations, and informal conversations with employees to identify practical challenges and understand how employees perceive and respond to the transition.

The results show that the fleet is currently dominated by diesel vehicles, and that 42 out of 63 vehicles are scheduled to be replaced in 2025 as their lease contracts expire. If 23 of these are replaced with BEVs, the BU can meet its target of a 50% electric fleet by the end of 2025. The cost comparison shows that among the electric vehicle alternatives, passenger cars are generally the cheapest option for the company, particularly when they can be charged at the workplace. For light commercial vehicles (LCVs), diesel models are currently more affordable than electric models, and HVO100 is slightly more expensive than diesel. In addition to the cost and replacement considerations, the qualitative findings identified several organisational challenges, including uncertainty around vehicle selection, limited experience with BEVs, reluctance to change routines, and a need for clearer communication.

In conclusion, the findings suggest that the BU’s climate targets are achievable, but the outcome will depend on how the transition is planned and supported in practice.