Abstract: The absorption cooling system is capable of continuous operation both day and night while using only solar power for its basic operation. The system is an absorption type system using phase changes of aqua-ammonia and a storage system for storing chilled refrigerant for operations when solar power is not available. When solar power is available during the day, the system operates according to the principles of absorption cooling systems, and also stores a reserve of chilled refrigerant in the storage unit. The stored refrigerant then continues the absorption process during the night when solar energy is not available, thereby providing uninterrupted cooling during the day, and also at night when solar energy is not available.