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An analysis released this week by the Welsh Government Energy Service reveals that the 2,045 electric vehicles (EVs) operating across Wales’ public sector are delivering net energy cost savings of up to £1.9 million ($2.4 million) each year. By shifting from diesel to electricity, the fleet avoids purchasing more than 2.4 million liters of diesel annually.
Sharp savings from fuel switch
The service calculated that the transition saves between £1.4 million and £1.9 million in net energy costs annually, depending on the electricity tariff each public body pays. Without EVs, the same mileage would require purchasing diesel worth up to £3.7 million per year. Charging the fleet consumes roughly 8.6 GWh of electricity.
The analysis also modeled a 100-day oil price spike. During such an event, the EV fleet would dodge an extra £200,000 to £280,000 in diesel costs, underscoring the financial insulation that electrification provides.
Energy security and global oil exposure
For the Welsh Government, the move away from diesel is as much about strategic resilience as it is about cost. Diesel, a globally traded fuel, is subject to sudden price swings driven by geopolitical tensions. By shifting demand to domestically generated electricity—which is
