This paper presents a state-of-the-art study of solar collector-cum-storage systems with one or more mirror boosters suitable for water heating applications. Three specific configurations for solar collector with storage viz., a shallow solar pond, rectangular built-in-storage and triangular built-in-storage have been considered and their thermal modelling results with two and four reflectors on the solar collection system are presented in the form of graphs and tables. The thermal performance of each configuration is increased significantly by addition of reflectors R-1, R-2, R-3 and R-4 surrounding the solar collector/storage systems. The effect is a maximum for the triangular built-in-storage solar water heater (the rise in the water temperature is about 10°C for winter and about 12°C for summer) and a minimum for the shallow solar pond water heater (the rise in the water temperature is about 7°C for winter and about 8°C for summer).