Energy storage duration of new energy power station

How long does energy storage last?

The average energy storage duration is 2.3 hours, an increase of about 0.2 hours since the end of 2023. New energy storage refers to energy-storage technologies other than conventional pump storage.

How long will energy storage projects last in 2024?

Regarding storage duration, the share of new energy storage projects with a duration of four hours or more increased to 15.4 percent in 2024, up by about 3 percentage points since the end of 2023.

What is new energy storage?

New energy storage refers to energy-storage technologies other than conventional pump storage. An energy-storage system charges when wind power or photovoltaic power generates a large volume of electricity or when the power consumption is low, and it discharges otherwise. China's operational efficiency of new energy storage continues to improve.

What is storage duration?

Storage duration is the amount of time storage can discharge at its power capacity before depleting its energy capacity. For instance, a battery with 1 MW of power capacity and 4 MWh of usable energy capacity will have a storage duration of four hours.

What is the difference between rated power capacity and storage duration?

Rated power capacity is the total possible instantaneous discharge capability of a battery energy storage system (BESS), or the maximum rate of discharge it can achieve starting from a fully charged state. Storage duration, on the other hand, is the amount of time the BESS can discharge at its power capacity before depleting its energy capacity.

How important is energy storage?

Projects with storage durations between two and four hours represented 71.2 percent, while those with durations of less than two hours accounted for 13.4 percent. "New energy storage plays an essential regulatory role in the new power system, significantly promoting the development and consumption of renewable energy," Bian noted.