The trending movement toward implementing renewable energy resources is still rising. Global warming and the many other hazardous effects made by fossil fuels motivated the whole world to transform to renewable energy resources. Water pumping is considered a primary load that consumes a high power conventionally supplied by diesel fuel. Therefore, Photovoltaic (PV) energy is increasingly employed in water pumping systems. This technology is based on using a PV array to convert solar energy into electrical energy to run a DC or AC motor-based water pump. To increase the employability of solar energy in water pumping systems, this paper presents a viable method of PV sizing to get the required PV modules to cover the load of water pumping. A presented method is a user-friendly tool based on economical values entered by a non-technician user. The main objective of the study is to cover the research gap found in the current PV sizing tools for water pumping systems by presenting a totally stand-alone PV system consisting of the solar array, inverter, solar charge controller, and circuit breaker, and a battery bank. Moreover, the total cost of the system installation and its payback period is calculated. The study has discussed the performance of the system in a different geographical location in Egypt. Finally, the carbon dioxide reduction saved by the system is measured. The results assure the effective utilization of solar energy as a driving energy source for the water pumping systems.