Glendale Water & Power GWP

Glendale Water & Power Uses New 2-MW BESS for Fast Response

Battery Energy Storage System at substation provides rapid response to load shifts.

Glendale Water & Power's (GWP's) has successfully installed a new 2-MW battery energy storage system (BESS) next to the newly upgraded Grandview Substation. The BESS can now instantaneously respond to shifts in systemic load, providing GWP with an unprecedented capacity to regulate its transmission. This system is now one of the fastest responding storage systems for any municipal utility in Southern California.

Beyond renewable integration, the BESS may serve as an emergency source of energy to start up other units, mitigating the impact of potential unplanned disruptions in service. It will also reduce costs by delaying the need for infrastructure upgrades.

This BESS is a small-scale system that GWP will use to gain experience in the use of battery storage and eventually to use that experience to develop and incorporate a larger scale battery component into its energy system.

GWP will utilize and evaluate the BESS as it is integrated into the daily system and from there to expand the operation to include additional and larger battery storage projects as a key component of its resource portfolio. The full-scale BESS will support the integration of renewable resources by mitigating the intermittent energy supplied by renewable resources such as photovoltaic and wind.

"Embracing innovative technologies puts GWP in the forefront of municipal utilities that are seeking to improve electric reliability,” stated Steve Zurn, general manager of Glendale Water & Power. The BESS can provide the backup power to start GWP’s power plant generators in case of a major systemwide outage to allow power to be restored to city’s customers quicker.

The project was constructed by BETA Engineering with batteries supplied by SAFT America and the entire project was facilitated by Skylar Resources.

BESS Project Overview

  • Location: City of Glendale, California – Grandview Substation
  • Maximum discharge capacity: 2 MW
  • Primary function: Transmission system regulation and load balancing
  • Battery Rating: 950 kWh
  • Battery Manufacturer: Saft
  • Inverter Manufacturer: ABB
  • Engineering, Design and Construction: Beta Engineering

Along with the BESS project, last year, the vintage 1930 substation underwent a $15 million renovation to expand its capacity and install gas-insulated switchgear. The substation also got a facelift, bringing its façade in line with the attractive Municipal Light & Power building next door.

 For more information, visit this recent link or the BESS project’s original announcement at Glendale Water & Power.






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