Renewable energy storage refers to methods used to store energy generated from renewable sources like solar and wind. Since these energy sources are not always available, storage systems help capture excess energy when production is high and release it when demand increases. Common storage technologies include batteries, pumped hydro, and compressed air systems. These storage solutions play a crucial role in balancing energy supply and demand, ensuring a reliable power supply. By storing renewable energy, we can reduce reliance on fossil fuels and lower greenhouse gas emissions, contributing to a more sustainable energy future.