The majority of Small Island Developing States (SIDS) rely on imported diesel fuel to generate electricity on the islands. This reliance on diesel exposes SIDS to multiple challenges. Solar powered microgrids appear to offer a significant opportunity for SIDS to lower their electricity costs and improve their energy security, while also advancing their climate objectives. Yet, thus far, relatively few islands have made the switch. Through a series of publications and events, the Guarini Center has examined the benefits and challenges to expanding renewable energy on SIDS.