Arevon Energy’s 300 MW Nighthawk battery storage project goes online in Poway, California

Arevon Energy declared its Nighthawk Energy Storage Project fully operational on August 12, 2026. Located in Poway, California, the facility carries a capacity of 300 MW / 1,200 MWh—making it the largest standalone battery storage project in Arevon’s portfolio.

The developer, owner, and operator says Nighthawk can power up to 385,000 homes for as long as four hours during peak demand periods.

Project specifications and technology

Nighthawk runs on lithium iron phosphate (LFP) battery technology. That wasn’t a random call—LFP batteries have a solid safety record and a longer operating life than other lithium-ion chemistries, which matters considerably for a utility-scale facility expected to run for decades.

That cycle helps take pressure off the San Diego region’s grid, cutting the risk of shortfalls during high-consumption stretches like summer heat waves.

The core function is straightforward: store electricity when demand is low, release it when demand spikes. That cycle helps take pressure off the San Diego region’s grid, cutting the risk of shortfalls during high-consumption stretches like summer heat waves. At 300 MW / 1,200 MWh, Nighthawk ranks among the region’s most significant energy storage facilities. It operates under a long-term power purchase agreement with Pacific Gas and Electric Company (PG&E), tying it directly into California’s broader push to keep the lights on as the energy mix shifts.

Why California needed this project

California’s electricity demand isn’t standing still. Population growth, transportation electrification, heating electrification, and an expanding economy are all pushing consumption upward—putting real pressure on a grid that’s simultaneously going through a fundamental transformation.

The shift toward renewables creates a reliability challenge that’s easy to underestimate. Solar and wind generate power on nature’s schedule, not the grid’s. When the sun sets and demand stays high, something has to fill that gap, and battery storage is the answer the industry has landed on.

The California Public Utilities Commission (CPUC) saw this coming. Through its integrated resource planning and mid-term reliability procurement programs, the agency identified the need for new storage capacity. Nighthawk is a direct result of that planning. As CPUC Executive Director Leuwam Tesfai put it at the ribbon-cutting, the project shows “how thoughtful planning, strong partnerships, and targeted investment can deliver the reliable, clean energy resources California needs.” The facility also supports California’s clean energy transition goals more broadly—helping the state move away from fossil fuel peaker plants that traditionally cover demand spikes.

Economic and community impact

The numbers on Nighthawk’s economic footprint are concrete. Over its lifetime, the project is expected to generate more than $30 million in property tax revenue for the Poway area—money that flows to local schools, public safety services, and infrastructure. During construction, more than 130 workers were employed at peak activity, generating business for local companies along the way.

Arevon also built relationships well beyond the job site. The company partnered with the North County Special Needs Community Foundation, the Kiwanis Club of Poway and The Ranches, the Rancho Family YMCA, and the Deputy Sheriffs’ Association of San Diego County—covering youth programs, first responder support, special needs adult services, and climate education.

Tony Rubino, President of the North County Special Needs Community Foundation, said Arevon’s engagement felt genuine from the start. “It was evident to me from the beginning that the company was genuinely committed to engaging with and supporting the local community,” he said. A ribbon-cutting ceremony marked the official completion, drawing local officials and business leaders including San Diego County District 2 Supervisor Joel Anderson and San Diego Regional Chamber of Commerce President Chris Cate.

Arevon’s broader energy storage portfolio in California

Nighthawk is a milestone, but it’s not a one-off. Arevon owns and operates more than 6.3 GW of solar and energy storage projects across 18 states, placing the company firmly in the upper tier of American renewable energy developers.

California has been a particularly active market. Recent operational milestones in the state include the two-phase Eland Solar-plus-Storage Project, the Peregrine Energy Storage Project, the Vikings Solar-plus-Storage Project, and the Condor Energy Storage Project. Industry recognition has followed—Condor won Proximo’s North America Storage Deal of the Year Award, while Vikings took IJGlobal’s Renewables Deal of the Year in the energy storage category.

The pipeline keeps moving. Arevon’s 250 MW Cormorant Energy Storage Project is currently under construction in Daly City. The company also earned the No. 1 developer ranking in California on Solar Power World’s 2026 Top Solar Contractors List, a clear signal of where it stands in the state’s competitive clean energy market.

Designed to address a real and growing reliability gap

Nighthawk is a significant addition to California’s energy storage infrastructure. The 300 MW / 1,200 MWh facility in Poway went live on August 12, 2026, using LFP battery technology under a long-term agreement with PG&E—designed to address a real and growing reliability gap in the San Diego region as renewable generation expands.

Beyond the grid, the project delivers measurable local benefits: $30 million in projected property tax revenue, 130-plus construction jobs, and active community partnerships. For Arevon, Nighthawk is the largest standalone battery project in its portfolio. With Cormorant under construction in Daly City, it likely won’t hold that title for long.

Kelly Lippke

Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.