Grid storage refers to systems that store energy for later use, helping to balance supply and demand in electrical grids. These systems can store excess energy generated from renewable sources like solar panels and wind turbines when production is high, and release it when demand increases or generation decreases. Common types of grid storage include batteries, pumped hydro storage, and compressed air energy storage. By providing a reliable way to manage energy fluctuations, grid storage enhances the stability and efficiency of the power supply, making it a crucial component in the transition to cleaner energy sources.