This research investigates the impact of solar water heating systems on energy consumption in residential buildings, using the System Advisor Model (SAM) software. The study encompasses the installation and simulation of solar water heating systems across a sample of residential buildings, with their performance evaluated by altering key parameters such as tilt angle, type of working fluid, and number of collectors. A detailed analysis of the collected data is presented, focusing on energy savings achieved, system efficiency, and financial benefits, as well as the broader environmental impact of the technology. The study further examines the influence of factors such as geographic location, solar irradiance, orientation, and collector design on the overall performance of the systems. Key findings indicate that specific configurations, such as tilting panels between 45° and 65°, significantly enhance efficiency and financial returns. The results also highlight notable regional variations in performance, emphasizing the importance of tailoring system designs to local climatic conditions. This research provides critical insights into the potential of solar water heating systems to reduce energy consumption and carbon emissions in residential buildings. The study concludes by advocating for the widespread adoption of this technology, supported by financial incentives, public awareness campaigns, and further research to optimize system design and performance. These recommendations aim to promote the development of sustainable and energy-efficient buildings globally.