The authors have reviewed the present status of solar powered absorption systems. The book presents two cases studies considered: Netcare Moot Hospital system and the Vodacom World system. TRNSYS simulations are carried out for both systems and their results presented. A complete system performance analysis will be carried for each system and the main performance indicators calculated. The book presents the system performance results obtained during the operation of the systems is presented and analyzed. The Moot system was commissioned in October 2009 and was in operation up until November 2011 when it was decommissioned where as the Vodafone Ste Solutions Innovation Center system was commissioned in November 2011 and is still operational. An economic analysis has been carried out for the Vodafone system and the annuity calculated and the cost per unit of cold produced found. Comparison of simulation results and the recorded system performance data compared and the discrepancies are explained. The main discrepancies are due to the weather data and the differences between the data sets used are explained in depth. The main conclusions of this study are summarized.