Kooltube Eutectic Refrigeration System is a holdover or latent heat storage system. The completed unit comprises a 220V single phase or 380V 3 phase condensing set coupled to eutectic beams mounted internally to the roof of the truck body. Externally,to the uninitiated,the system appears to be a normal over cab refrigeration unit as the condensing set is conventionally mounted above the cab of the truck. For option, condensing set can be mounted under the truck chassis or into the truck body.