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This thesis supports the transition to a fossil-free vehicle fleet at Omexom StockholmDistribution 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 consumptionshould be replaced with the renewable fuel HVO100.

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

The results show that the fleet is currently dominated by diesel vehicles, and that 42 out of 63vehicles are scheduled to be replaced in 2025 as their lease contracts expire. If 23 of these arereplaced 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 aregenerally the cheapest option for the company, particularly when they can be charged at theworkplace. For light commercial vehicles (LCVs), diesel models are currently more affordablethan electric models, and HVO100 is slightly more expensive than diesel. In addition to the costand replacement considerations, the qualitative findings identified several organisationalchallenges, 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 theoutcome will depend on how the transition is planned and supported in practice.Tek nisk-naturvetensk apliga fak ulteten, Upps ala universitet. Utgiv nings ort U pps al a. H andl edare: Mag nus Lindqvist, Äm nesgransk are: J ennifer Leij on, Exami nator: Elísabet Andrés dóttir