The Energy Storage Report 2024

Now available to download, covering deployments, technology, policy and finance in the energy storage market

Mitsubishi supplying six-hour Emerald BESS for SDG&E


Californian investor-owned utility San Diego Gas & Electric has ordered a 10MW, six-hour battery energy storage system (BESS), dubbed Emerald, from Mitsubishi Power.

Mitsubishi is supplying its solution for the Pala-Gomez Creek BESS project announced last month when it was authorised by California Public Utilities Commission (CPUC), as reported by The BESS is set to enter commercial operation on 31 January 2023.

This article requires Premium SubscriptionBasic (FREE) Subscription

Enjoy 12 months of exclusive analysis

  • Regular insight and analysis of the industry’s biggest developments
  • In-depth interviews with the industry’s leading figures
  • Annual digital subscription to the PV Tech Power journal
  • Discounts on Solar Media’s portfolio of events, in-person and virtual

Or continue reading this article for free

The BESS project Mitsubishi Power is delivering to is one of three being developed for SDG&E totalling 161MW/664MWh which were authorised, with the other two being provided by Fluence and ConEdDev.

It is the Tokyo-headquartered company’s eighth BESS project in California bringing the total in the state to 280MW/1,140MWh. The company’s Emerald storage solution includes full turnkey design, engineering, procurement, and construction, as well as a 10-year long-term service agreement.

The project will repower an existing energy storage site, the company said, and will use its energy management system (EMS) the Emerald Integrated Plant Controller. The BESS is a lithium iron phosphate (LFP) battery system.

The Pala-Gomez Creek BESS is to be located at an existing SDG&E battery storage yard adjacent to the Pala substation in San Diego county. It was the result of efforts by the investor-owned utility to identify potential future energy storage sites that can leverage existing infrastructure.

California is the main driver of the energy storage market in the US, accounting for 90% of utility-scale deployments in 2021. Its three investor-owned utilities have in the last few years been directed by the regulator to procure additional, clean energy resources to bolster the grid in light of fossil fuel retirements but also increased wildfire risk. It plans to have a zero-carbon electricity grid by 2045.

Read Next

February 23, 2024
A roundup of energy storage news announcements from Energy Vault, Mitsubishi Power Americas and Tesla.
February 22, 2024
The implications of larger projects, revenue streams of projects, and grid connection issues were discussed on a panel at the ESS EU event in London.
February 20, 2024
A recent report from the Clean Energy Associates found that system-level defects accounted for nearly half of all defects found in battery energy storage systems (BESS), of which two issues related to increased risk of fire.
February 20, 2024
Global energy storage developer Eku Energy has started constructing two UK battery energy storage systems (BESS), totalling 130MWh of capacity.
February 14, 2024
San Diego Gas & Electric (SDG&E), one of California’s main investor-owned utilities (IOUs), has brought online a portfolio of four ‘advanced’ microgrids equipped with 180MWh of battery storage.

Most Popular

Email Newsletter