The article examines ways to make hydrogen from water using renewable energy sources like solar or wind power. This hydrogen can be stored underground in salt caverns, acting like a giant battery for when we need extra energy. The stored hydrogen can be used later when there's high demand for power, helping balance out energy fluctuations. Different methods for making and storing hydrogen are compared to see which is the best option in terms of cost and practicality. The study looks at the potential benefits and challenges of using hydrogen as a clean energy source in our power grid.