The operation strategy consists of three separate parts: (1) forecasting of wind velocity, (2) scheduling of the power exchange with the market and, (3) on-line operation of the storage. In the present model, the forecasts of load and spot price are assumed to have 100% accuracy. . In this paper, we propose a model to evaluate the cost per kWh and revenue per kWh of energy storage plant operation for two types of energy storage: electrochemical energy storage and. The paper at hand presents a new approach to achieve 100 % renewable power supply introducing Thermal Storage. . The storage system can power 20,000 Yemeni homes for 8 hours during grid outages – equivalent to 40% of Sana'a's residential electricity demand. Prior to the installation of the diesel power modules, our engineering and operations teams performed.