Wind and solar energy generation can be intermittent due to weather conditions. Energy storage systems help smooth out these fluctuations by storing excess energy when generation is high and releasing it when generation is low, thus ensuring a more consistent and reliable energy supply.
They contribute to grid stability by providing ancillary services such as frequency regulation and voltage support. They can respond rapidly to fluctuations in supply and demand, helping to balance the grid and prevent blackouts or brownouts. They also help manage peak electricity demand by storing energy during off-peak hours when demand is low and discharging it during peak hours when demand is high.
By enabling greater integration of renewable energy sources and, by providing an alternative to fossil fuel derived grid stability services, energy storage plays a key role in facilitating the energy transition.