Yes, sweet potato chili can be easily prepared by refrigerating in an airtight container for up to 3 days or in the freezer for up to 1 month. Reheat on the stovetop, in a microwave, or in an instant pot. To keep sweet potato chili from drying out as it cools down, add some extra liquid like broth, tomato sauce, or water before storing it in the fridge or freezer.