Press Release

McCarthy Building Companies Completes Construction of LS Power’s 250MW Gateway Energy Storage Project in San Diego County, the Largest Battery Storage Project in the World

PHOENIX (Aug. 24, 2020)McCarthy Building Companies’ Renewable Energy & Storage group recently completed construction of LS Power’s 250 megawatt (MW) Gateway Energy Storage Project in San Diego County, Calif. LS Power’s Gateway system will be the largest operational battery storage facility in the world when it is fully energized at the end of this month.

Battery energy storage is a critical part of California’s strategy to provide greater grid stability and reliability that replaces retiring natural gas generation, while reducing consumer energy costs. Currently, Gateway Energy Storage is energized at 230 MW and on track to reach 250 MW by the end of August 2020, significantly increasing the state’s energy storage capacity.

“We’re proud to be a part of this landmark energy storage project for LS Power Group in Southern California,” said Dhruv Patel, senior vice president of EPC within the Renewable Energy & Storage group at McCarthy Building Companies. “We look forward to continuing our work on the project, delivering cost-effective, clean energy solutions to help the state meet its ambitious renewable energy goals.”

The Gateway Energy project has a 15-year contract with Edison International subsidiary Southern California Edison Co. and another long-term agreement with Pacific Gas and Electric Co., the operating arm of PG&E Corp. Initially, the system will offer one hour of energy storage, increasing to nearly three hours in 2021 and to four later.

The McCarthy Renewable Energy & Storage group, based in Phoenix, provides engineer, procure, construct (EPC) services on utility-scale solar installation projects and renewable energy storage projects across the U.S. Nationally, McCarthy offers in-budget development, constructability reviews, cost-estimating, value analysis, schedule development, project management and schedule control.

In recent years, McCarthy’s Renewable Energy & Storage group has completed or is in the process of constructing more than 48 utility-scale clean energy projects in communities from coast to coast, representing a combined capacity of more than 3.6 Gigawatts (GW) of clean energy production and 350 MW of energy storage.

About LS Power
LS Power is a development, investment and operating company focused on the North American power and energy infrastructure sector. Since its inception in 1990, LS Power has developed, constructed, managed or acquired more than 42,000 MW of power generation, including utility-scale solar, wind, hydro, natural gas-fired and battery storage projects, and over 680 miles of transmission. Additionally, LS Power actively invests in businesses and platforms focused on distributed energy resources and energy efficiency, such as CPower Energy Management and EVgo. Across its efforts, LS Power has raised in excess of $45 billion in debt and equity financing to support North American infrastructure. For more information, please visit

About McCarthy Building Companies
McCarthy Building Companies, Inc. is the oldest privately held national construction company in the country – with more than 150 years spent collaborating with partners to solve complex building challenges on behalf of its clients. With an unrelenting focus on safety and a comprehensive quality program that span all phases of every project, McCarthy utilizes industry-leading design phase and construction techniques combined with value-add technology to maximize outcomes. Repeatedly honored as a Best Place to Work and Healthiest Employer, McCarthy is ranked the 9th largest domestic builder (Engineering News-Record, May 2020). With approximately 5,000 salaried employees and craft professionals, the firm has offices in St. Louis, Atlanta; Collinsville, Ill.; Kansas City, Kan.; Omaha, Neb.; Phoenix; Las Vegas; Denver; Dallas, Houston; and San Diego, Newport Beach, San Francisco, San Jose and Sacramento, Calif. McCarthy is 100 percent employee owned. More information about the company is available online at or by following the company on Facebook, Twitter, LinkedIn and Instagram.

Media contact: Patty Johnson,,
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