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What are battery energy storage systems?

The battery energy storage system's (BESS) essential function is to capture the energy from different sources and store it in rechargeable batteries for later use. Often combined with renewable energy sources to accumulate the renewable energy during an off-peak time and then use the energy when needed at peak time. This helps to reduce costs and establish benefits for the user. BESS has flexibility with grid connection and can be operated in local mode when the grid is not available.

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ABB Energy storage white paper: Improve efficiency and save space

Where is battery energy storage used?



Why leverage battery energy storage solutions now?



Primary components of battery energy storage systems


The battery is the fundamental element of an electrical energy storage system.

Battery management system (BMS)

The Battery Management System (BMS) ensures and keeps track of the internal performance of the battery cells, system parameters, and potential hazards. The BMS data is internally collected and used to monitor and maintain an optimum level of charge without over changing the battery, helping to prolong the lifecycle of the system.

Power conversion/conditioning system (PCS)

The power conversion system is designed to convert the direct current produced by batteries, or the battery system, into alternating current that can be used for power consumption on the grid. During off-peak time, the PCS takes the energy from the grid to store in the BESS. In essence, the PCS's main function is to convert the power between the energy storage system and the grid, and vice versa. It accomplishes that by offering a bi-directional flow from DC-AC and AC-DC. See how our ABB OEM products flourish here: Download BESS brochure

The battery energy storage system illustration below consists of batteries, a battery management system, an inverter, controls, and a transformer.

ABB ESS component selection

*ABB White paper: Battery energy storage moving to higher DC voltages for improved efficiency and avoided costs


Related products for battery energy storage DC and AC components

DC side components for energy storage systems

Used in:

  • Battery Management System (BMS)

  • DC side of the Inverter / Converter

  • DC side of the Power Conditioning System (PCS)

  • DC side of Energy Management System (EMS)



Related webinars

Battery energy storage going to higher DC voltages: a guide for system design
Battery energy storage going to higher DC voltages: a guide for system design

The evolution of battery energy storage systems (BESS) is now pushing higher DC voltages in utility-scale applications. Industry experts are forecasting phenomenal growth in the industry with annual estimate projections of 1.2 BUSD in 2020 to 4.3 BUSD in 2025.

Speaker: Allen Austin, VP Renewable Energy, and E-Mobility Division, JD Martin Company

Watch now