In 2019, Efficiency for Access and Energy 4 Impact, tested and assessed the market viability of Agsol solar milling equipment in East Africa, including its ability to meet consumer demand, generate a profit, and compete with incumbent milling technology. Results indicate that, while solar mills have market potential, they are not yet commercially viable because they cannot fully compete with their diesel counterparts. This report outlines several actions that manufacturers, suppliers, donor, investors and policymakers can take to close the commercial viability gap for solar mills.