Abstract: A refrigeration system that maintains the temperature of products continuously within prescribed limits, while using electrical power only during selected time periods of each day, when the cost of that power is relatively low. During that time period, the refrigeration system cools the product to a temperature significantly lower than its normal storage temperature, such that subsequently, during a time period when electrical power is relatively expensive, the compressor and fan of the refrigeration system are disabled and the inherent thermal storage capacity of the product, itself, ensures that the product temperature will not rise above a predetermined maximum temperature.