This article explores impact investing within the renewable energy sector. Drawing on ethical decision making and sensemaking, this article contributes to an enhanced understanding of the complex ethical sensemaking process of impact investors when facing plausible situations in a world of contested truths. Addressing the ethical tensions faced by impact investors with mixed motives, this study investigates the way decision makers use context-specific reasons to make sense of and shape the renewable energy investment process. This represents an initial attempt to (...) understand ethical sensemaking in impact investing made within the renewable energy sector using a multi-stakeholder approach. Our findings show that prosocial, personal, reputational, and economic motives are the main drivers of REI, with prosocial and personal motives being value-based, and reputational and economic motives being evidence-based. We find three different modes of ethical sensemaking, allowing for the construction of the four motives noted above. These motives are based on the context-specific reasons of impact investing decision makers in the RE sector. This article contributes to the academic discourse on ethical sensemaking with some key processes involved in ethical decision making, and a better understanding of the underlying motivations of impact investing in the RE sector. (shrink)