Solar-powered cooling systems can help keep food fresh in Rwanda. Researchers used a computer program to model how well a solar-powered chiller could cool a room. They tested different sizes of solar panels and batteries to see how much solar energy could be used. They found that using two loops instead of one can make the chiller more efficient, even with an extra pump. With 35 solar panels, the two-loop system needs less battery power to work well compared to the one-loop system. This means that having a bigger chiller can actually save energy. The study helps decide how many solar panels and batteries are needed to keep the chiller running and cool the food.