Global food production is increasing, yet over one-third is lost postharvest, threatening food security and fuelling climate change. Low-income, food-deficit countries contribute 22% of global food loss, disproportionately affecting vulnerable groups, particularly women engaged in perishable produce trade. Inadequate cold chains are a major driver, causing losses of 526 million tons annually and reducing smallholder incomes by 15%. Uganda lags in cold storage capacity; for instance, Arua City had no bulk cold facility in 2024 despite evidence that refrigeration could save 144 million tons globally. This study aims to (1) assess the magnitude, causes, and costs of postharvest losses in perishable value chains in West Nile, (2) co-create and test low-input off-grid preservation technologies using local resources, and (3) train and equip vendors to adopt these innovations. Findings will guide policies and investments for food security, resilience, and SDG 12 achievement.