Solmar Insights
Arevon Energy has brought online the 300-MW/1,200-MWh Nighthawk Energy Storage Project in Poway, California, marking the largest standalone battery system in the company’s portfolio to date. The lithium iron phosphate (LFP) battery system, operating under a long-term agreement with Pacific Gas and Electric (PG&E), is set to play a significant role in supporting grid reliability in the high-demand San Diego region while generating substantial tax revenue for local communities over its operational lifespan.
Key figures
300 MW / 1,200 MWh project
Located in Poway, California
Over $30 million in property tax revenue expected
130 peak construction jobs created
Details of the Nighthawk project
The Nighthawk Energy Storage Project is configured for 300 megawatts of power output and has a total energy capacity of 1,200 megawatt-hours. This scale makes it a flagship installation within Arevon Energy’s growing energy storage portfolio. Constructed in Poway, a community within San Diego County, Nighthawk utilizes LFP battery technology, which is increasingly viewed as a preferred chemistry for grid-scale applications due to its enhanced safety and lifespan features.
The system is directly contracted through a long-term agreement with PG&E, one of California’s primary investor-owned utilities. Under this arrangement, Nighthawk contributes to grid services by absorbing excess renewable generation and supplying stored power during periods of elevated demand, crucial functions as California’s grid integrates higher volumes of variable solar and wind energy.
The site’s commissioning comes as large-scale storage becomes essential for reliability in California’s high-load, renewables-driven power environment. Nighthawk’s standalone configuration, rather than being paired with a generation source, allows it to address flexible dispatch and capacity needs independent of local renewable assets.
Grid reliability and regional market impact
As California continues to retire fossil generation and add more intermittent renewables, investments in grid-scale storage like Nighthawk are being relied upon for grid stability, particularly in the California ISO region. Energy storage provides crucial services ranging from peak shaving and frequency regulation to supporting resource adequacy requirements for load-serving entities.
By enabling time-shifting of renewable generation and improving reserve margins, the facility helps address evening ramping challenges and potential supply shortfalls, issues that have led to reliability events in recent years. Nighthawk’s location in the densely populated San Diego load pocket further increases its value, as congestion and local reliability needs are especially pronounced in this area.
Over its operating life, the project is expected to contribute more than $30 million in property tax revenues to the local community. Grid operators, policy makers, and utilities alike are monitoring the performance of such projects as they set future planning benchmarks for capacity and reliability procurement.
Construction, community impact, and workforce
Nighthawk’s construction phase peaked at over 130 workers, delivering short-term economic stimulus to the region and underscoring the continuing demand for skilled labor in the battery energy storage sector. With a localized workforce and a supply network able to support project build-out, installations of this size represent tangible employment and contracting opportunities at the community level.
Arevon’s approach in Poway included not just development and construction but also a range of community partnerships. The company collaborated with local groups such as the North County Special Needs Community Foundation, the Kiwanis Club of Poway and The Ranches, Rancho Family YMCA, and the Deputy Sheriffs’ Association of San Diego County. These initiatives signal a broader industry trend of utility-scale energy developers engaging with stakeholders well beyond the project boundary.
Importantly, the economic ripple of projects like Nighthawk is not limited to operational tax payments but extends to sponsorships, donor support for youth and special needs programs, and resources channelled to first responders and climate education efforts.
Role of PG&E and contract structure
Pacific Gas and Electric is the offtaker for the Nighthawk project’s stored energy through a multi-year agreement intended to guarantee resource availability during grid stress events. PG&E, facing California’s aggressive decarbonization mandates and changing load shapes, continues to leverage contracted storage assets to manage capacity obligations and system contingencies.
While the source does not specify the precise duration or pricing structure of the long-term agreement, such contracts typically include defined availability, performance guarantees, and the flexibility for the utility to dispatch the battery fleet as market and operational needs dictate. For the utility, control over assets like Nighthawk enables compliance with regulatory standards for reliability and resource flexibility.
This contract-driven approach also ensures a revenue stream for Arevon while integrating BESS assets more seamlessly into utility portfolios, supporting both merchant opportunities and reliability-centric procurement models.
Strategic significance for storage sector
Nighthawk’s commissioning demonstrates continued momentum in large-scale standalone battery deployments, distinct from co-located or hybrid solar-plus-storage models. The addition of 1,200 megawatt-hours of capacity positions Arevon’s project among the most substantial recently completed sites in the state and underscores the utility procurement trend now prioritizing scalable, flexible energy infrastructure.
The project’s use of LFP batteries reflects a growing preference in the industry for thermal and chemical stability, which are increasingly valued by developers and utilities as MWh-scale projects become normal in the California grid landscape. Lessons learned from Nighthawk are likely to inform the development, procurement, and operational strategies for subsequent California ISO BESS assets.
For developers, offtakers, and investors, Nighthawk illustrates both the rising economic potential of grid-scale storage and the operational complexities, including interconnection, resource adequacy certification, and lifecycle asset management, that will shape the next several years of battery buildout in the US.
What this means for buyers
Buyers in utility and institutional markets should note the significance of long-term procurement structures and local engagement as the storage sector matures. Arevon’s Nighthawk project provides a precedent for large standalone installations under utility contract, highlighting evolving best practices in grid-scale asset deployment and community partnership. For those considering energy storage investments or procurement, the integration of LFP technology and the community and regulatory benefits attached to such projects offer a template for successful negotiation and operation in competitive California markets.
