Terra-Gen, the California-based renewable energy producer jointly owned by Masdar and Igneo Infrastructure Partners, has announced that its Lockhart Solar PV IV project has reached commercial operations, completing the final phase of the Lockhart Solar and Energy Storage facility in San Bernardino County and bringing the complex's total solar generation capacity to 365 megawatts.

Final Phase Completes a Four-Part Development

The 80-megawatt Lockhart IV project marks the conclusion of a multi-phase development effort that has transformed approximately 4,000 acres of private land in San Bernardino County into one of California's significant solar and storage installations.

With all four phases now operational, the complete Lockhart Solar and Storage facility comprises 365 MW of solar generation capacity and 173.7 MW of battery storage, which Terra-Gen says is sufficient to meet the annual energy needs of more than 350,000 homes and businesses.

The facility as a whole includes nearly one million solar modules and 248 battery enclosures, connected to the broader grid through an existing gen-tie line linking to Southern California Edison's Kramer Junction Substation.

Lockhart IV Specifics

The fourth phase alone contributes 80 MW of solar capacity, which Terra-Gen describes as enough to power approximately 40,000 homes and businesses annually.

The project will deliver electricity under a long-term power purchase agreement with a California load-serving entity, though the specific counterparty was not identified in the announcement.

Cupertino Electric served as the engineering, procurement, and construction contractor for the Lockhart IV project. Construction created more than 220 jobs at peak activity, with crews logging over 122,000 work hours. Terra-Gen noted that the project was completed with no lost-time incidents.

Terra-Gen's Position and Pipeline

Terra-Gen describes itself as one of the largest independent, integrated renewable energy producers in the United States. The company is jointly owned by Masdar, the Abu Dhabi-based clean energy developer, and Igneo Infrastructure Partners.

John O'Connor, chief executive officer of Terra-Gen, said the company is well positioned to continue scaling its output. "We are excited to bring the Lockhart IV project online and continue investing in projects that help meet the growing electricity demand and create economic, social, and environmental positive impact," O'Connor said.

"With more than 15 GW of projects in our development pipeline, we are well positioned to continue delivering reliable, sustainable energy at scale that can help satisfy the energy needs of today and tomorrow."

The completion of Lockhart IV adds to Terra-Gen's existing renewable energy portfolio in California, though the announcement did not provide further details on the company's other operational projects in the state or the composition of the 15 GW development pipeline.

Scale of the Completed Facility

The completed Lockhart Solar and Storage complex represents a substantial land-use footprint, occupying around 4,000 acres of private land. The nearly one million solar modules installed across all four phases of the project illustrate the physical scale of the build-out undertaken over the course of the facility's development.

The 173.7 MW of battery storage capacity integrated into the complex positions the facility to provide not only generation but also storage, a combination that has become increasingly central to California's energy planning as the state works to manage grid reliability alongside a growing share of intermittent renewable generation.

The use of the existing gen-tie line to Southern California Edison's Kramer Junction Substation indicates that the project was able to leverage existing transmission infrastructure rather than requiring new interconnection construction for the final phase.

Broader Context Within Masdar's Portfolio

The Lockhart IV announcement comes as Masdar continues to expand its renewable energy footprint across multiple geographies. The company has separately announced agreements with EDF Power Solutions North America for a solar and energy storage project, achieved financial close with ENGIE on the 1.5 GW Khazna Solar Project in Abu Dhabi, and closed financing alongside consortium partners for Oman's first utility-scale solar and battery storage project.

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