Translations:Sustainable energy/62/en

Energy storage

Main articles: Energy storage and Grid energy storage

Energy from renewable sources is converted to potential energy that is stored in devices such as electric batteries. The stored potential energy is later converted to electricity and added to the power grid, even when the original source is unavailable.

A battery storage facility

Energy storage helps overcome barriers to intermittent renewable energy and is an important aspect of a sustainable energy system. The most commonly used and available storage method is pumped-storage hydroelectricity, which requires locations with large differences in height and access to water. Batteries, especially lithium-ion batteries, are also deployed widely. Batteries typically store electricity for short periods; research is ongoing into technology with sufficient capacity to last through seasons.