One of the goals of the European Union (EU) is to reduce greenhouse gas (GHG) emissions. To this end, internal combustion vehicles (ICVs) will be progressively replaced with battery electric vehicles (BEVs) over the course of a transition period that is expected to last until 2035. While GHG reductions have been extensively evaluated for continental territories, this is not the case for territories with isolated electrical power systems, as in some islands of the EU. Emissions generated in these territories are considerably higher than in continental systems because their electricity generation mixes commonly have more polluting fuels. In this study, a calculation is performed of the CO₂ emissions that result from the charging of a reference BEV in the different isolated electrical power systems of the Canary Islands (Spain). The results are then compared with the CO₂ emissions of ICVs. Results show that the Canary electrical power systems that consume the least energy are the most contaminating and that charging a BEV entails higher CO₂ emissions than those generated by an ICV. In addition, no significant differences were observed between BEV- and ICV-related CO₂ emissions in the electrical power systems of the islands with higher energy consumption. A small decrease in CO₂ emissions was only observed in isolated insular systems with energy storage systems and high levels of renewable penetration.

欧盟 (EU) 的目标之一是减少温室气体 (GHG) 排放。为此，在预计将持续到 2035 年的过渡期内，内燃机汽车 (ICV) 将逐步被电池电动汽车 (BEV) 取代。虽然已经对大陆地区的温室气体减排进行了广泛评估，但这并不是具有隔离电力系统的领土的情况，例如在欧盟的一些岛屿。这些地区产生的排放量远高于大陆系统，因为它们的发电组合通常含有更多污染燃料。在本研究中，计算了 CO ₂在加那利群岛（西班牙）的不同隔离电力系统中对参考 BEV 充电产生的排放。然后将结果与ICV的 CO _{2排放量进行比较。}结果表明，消耗能量最少的 Canary 电力系统污染最严重，并且为 BEV 充电会产生比 ICV 产生的更高的 CO _{2排放量。}此外，在能源消耗较高的岛屿的电力系统中， BEV 和 ICV 相关的 CO _{2排放之间没有观察到显着差异。}仅在具有储能系统和高水平可再生能源渗透率的孤立岛屿系统中观察到CO ₂排放量的小幅下降。