Integrating photovoltaic (PV) and electrochemical (EC) systems has emerged as a promising renewable energy utility by combining solar energy harvesting with efficient storage and conversion technologies. PV systems generate electricity by converting sunlight, while EC systems, including batteries, supercapacitors, and electrolyzers, store energy or produce clean fuels like hydrogen. This synergy guarantees energy reliability, minimizes energy loss during peak solar output, and supports smart-grid transitions. Revolutions in PV technologies, such as high-efficiency perovskite cells, and progressions in EC systems, including vigorous electrolyzers, have paved the way for scalable applications. Various integration configurations, such as PV–electrolyzer and PV–battery systems, outfit diverse energy storage and usage needs. Direct coupling offers simplicity but faces efficiency limitations, while indirect coupling with power management units enhances energy conversion efficiency—challenges like energy losses, high material costs, and long-term durability impact large-scale adoption. However, research into low-cost catalysts and stable materials continues to address these limitations. Integrated PV–EC systems offer key benefits, including sustainable hydrogen production, enhanced grid resilience, and improved energy independence. With ongoing technological advancements, these systems are poised to play a pivotal role in achieving carbon-neutral energy goals and fostering a sustainable future.