The development of solar dish/Stirling system as a promising green power generation technology, has received great attention from researches and governments. Nevertheless, the characterization and commercialization of SDS technologies need a deep understanding of the effect of different opt-geometrical and operational parameters on their performance. In this study, the modeling of a Solar Dish/Stirling System (SDSS) is presented to determine its power generation and overall efficiency. The opt-geometric sizing and thermal analysis of the SDSS have been mathematically modeled. Different parameters such as the concentrator diameter, the receiver temperature, the direct solar radiation, the wind speed, and the ambient temperature have been parametrically analyzed to determine their effect on the output power and total efficiency of the SDSS. Then, a commercial SDSS was designed based on the obtained parametric results and the thermal behavior of the system has been evaluated under meteorological conditions of Tianjin, China. Results showed that SDSS with concentrator diameters of (10-17.5 m) can produce great electrical capacities of (18.6-58.1 kW) with insignificant variation in the overall efficiency (23.7-24.25 %) compared to the SDSS with diameters of (2.5-8.5 m) that generates small capacities of (0.735-11.7 kW) with a remarkable variation of the overall efficiency (17.1-23.4 %) since the variation of the heat losses in the receiver are minimal for the SDSS with concentrator diameter larger than 10 m. Moreover, the results showed that the proposed SDSS could produce a power output of 23.11 kW with an efficiency of 23.05 %, under conditions of Tianjin during the summer solstice. Future investigations should be done on maximizing the optical and thermal performance of dish/Stirling components, accomplished by optimizing the industrialization process of concentrator segments and receiver, which considers an essential challenge for further SDSS development. (C) 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.