Seal Beach: Clean Energy on Navy Land

The Seal Beach Solar + Battery Energy Storage System (BESS) project is now complete and delivering clean power in Orange County, California. Built on federal land at Naval Weapons Station Seal Beach, the project combines solar generation and storage to improve reliability and reduce emissions.

Power and Scale

The system brings 11.75 megawatts (MWdc) of solar online through 25,620 modules spread across Navy property. That’s enough to cover the electricity needs of about 2,500 homes each year.

At the heart of the project is a 10 MW / 40 MWh BESS made up of 64 Tesla Megapacks. Pairing the array with this level of storage makes the power more reliable, allowing energy to be shifted and used when it’s needed most.

On the environmental side, the project is expected to cut more than 7,500 metric tons of carbon emissions annually — roughly the same as taking 1,600 cars off the road, according to EPA greenhouse gas equivalencies.

Why It Matters

Naval Weapons Station Seal Beach is a major munitions hub for the Pacific Fleet. Adding renewable energy directly on base improves mission assurance, giving the Navy a more resilient energy resource if the grid goes down. At the same time, the project supports the surrounding community by strengthening the local power system.

Built with Care

Working on secure federal land came with unique challenges. Our crew completed extensive underground civil work to support the Tesla Megapacks, with trenching, vaults, and other infrastructure delivered to exacting standards. Every step was done safely and in coordination with Navy operations, while also respecting the nearby Seal Beach National Wildlife Refuge.

Looking Ahead

With the Seal Beach project now operational, it shows what’s possible when renewable energy is built with both resilience and sustainability in mind. It’s a model we expect to see repeated at other federal and defense sites as the U.S. moves toward a cleaner energy future.