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We implement an agent-based, threshold model of innovation diffusion to simulate the adoption of electric vehicles among Irish households. We use detailed survey microdata to develop a nationally representative, heterogeneous agent population. We then calibrate our agent population to reflect the aggregate socioeconomic characteristics of a number of geographic areas of interest. Our data allow us to create agents with socioeconomic characteristics and environmental preferences. Agents are placed within social networks through which the diffusion process propagates. We find that even if overall adoption is relatively low, mild peer effects could result in large clusters of adopters forming in certain areas. This may put pressure on electricity distribution networks in these areas.