What is a battery energy storage system?

A battery energy storage system (BESS) is an electrochemical device that charges (or collects energy) from the grid or a power plant and then discharges that energy at a later time to provide electricity or other grid services when needed.

What is the market for grid-scale battery storage?

The current market for grid-scale battery storage in the United States and globally is dominated by lithium-ion chemistries (Figure 1).

How EV battery storage is boosting policy support?

Governments are boosting policy support for battery storage with more targets, financial subsidies and reforms to improve market access. Global investment in EV batteries has surged eightfold since 2018 and fivefold for battery storage, rising to a total of USD 150 billion in 2023.

Are EVs the future of battery storage?

EVs accounted for over 90% of battery use in the energy sector, with annual volumes hitting a record of more than 750 GWh in 2023 – mostly for passenger cars. Battery storage capacity in the power sector is expanding rapidly.

How do battery storage systems improve grid resilience?

ing supply and demand (see Figure 9). However, battery storage systems helped bridge the gap by providing stored energy when solar generation was unavailable, demonstrating their importance in enhancing grid resilience and ensuring uninterrupted energy supply, especially in regions heavil

Why is battery storage important?

Battery storage has many uses in power systems: it provides short-term energy shifting, delivers ancillary services, alleviates grid congestion and provides a means to expand access to electricity. Governments are boosting policy support for battery storage with more targets, financial subsidies and reforms to improve market access.