This study introduces a new optimization model for WSSs, incorporating solar plants and battery storage systems. . Photovoltaic (PV) power generation plays an important role in the clean energy. Placing PV on water has therefore become an interesting alternative siting solution. In this paper, the floating photovoltaic system is divided into four categories: fixed pile photovoltaic system, floating photovoltaic. . Converting a water pressurised distribution network into an off-grid pumping station supplied by solar photovoltaics represents a challenge for utility managers, user demand assessments evaluate the energy generated in a solar-powered systems to establish energy consumption. This work includes. . Our findings highlight that when water and renewable energy systems are cohesively designed and operated, it can markedly boost the energy efficiency of WDNs, furthering the sustainability goals of both the water and energy sectors.