What are base year costs for utility-scale battery energy storage systems?

Base year costs for utility-scale battery energy storage systems (BESSs) are based on a bottom-up cost model using the data and methodology for utility-scale BESS in (Ramasamy et al., 2023). The bottom-up BESS model accounts for major components, including the LIB pack, the inverter, and the balance of system (BOS) needed for the installation.

What is a utility-scale battery storage system?

Utility-scale battery storage systems will play a key role in facilitating the next stage of the energy transition by enabling greater shares of VRE. For system operators, battery storage systems can provide grid services such as frequency response, regulation reserves and ramp rate control.

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 a stationary battery?

Stationary batteries can be connected to distribution/transmission networks or power-generation assets. Utility-scale storage capacity ranges from several megawatt-hours to hundreds. Lithium-ion batteries are the most prevalent and mature type.

What is a 30 MW / 120 MWh Li-ion battery storage project?

30 MW / 120 MWh Li-ion battery storage project near one of its substations in Escondido to store excess renewable energy production in the state and also serve as a capacity reserve (SDG&E, 2017). The battery system offsets the peak demand overload and avoids distribution upgrades.

How many MW of battery storage does CAISO have?

Since 2016, CAISO has installed 80 MW of new battery storage systems, yielding a total of around 150 MW, including the largest Li-ion facility in North America at the time (30 MW / 120 MWh), located in Escondido and owned by San Diego Gas and Electric utility (Davis, 2018).