We developed an EV conversion kit for light truck to promote “pure (battery)” commercial EV. Operation of EV trucks can be arranged according to the capacity of battery installed generally because light trucks for deliveries inside cities are used in limited areas, fixed routes and scheduled operation time. Light delivery trucks are mostly used in food industry to make small amount deliveries and most of such trucks are equipped with freezer-refrigerator. We mounted a freezer-refrigerator on the converted EV truck, optimized the specification through demonstration and validated amount of CO2 reduction.