Oregon is set to host the largest solar-plus-storage facility in the U.S. The Oregon Solar Plus system marks a significant milestone in renewable energy innovation.
A cutting-edge renewable energy project is taking shape in Morrow County, northeastern Oregon. The Sunstone Solar project, approved by state regulators in November 2024, will span nearly 9,500 acres and feature 1,200 megawatts of solar capacity paired with up to 7,200 megawatt-hours of battery storage. Once operational, this Oregon solar-plus system will generate enough clean electricity to power approximately 800,000 homes annually, making it the largest solar-plus-storage installation in the nation.
Developed by Pine Gate Renewables, a North Carolina–based company, the project Oregon Solar Plus system also includes a unique initiative to invest up to $11 million in local wheat farms. This effort aims to offset economic impacts on the region’s agricultural sector, blending renewable energy development with community support. Construction is slated to begin in 2026, and the facility is expected to significantly boost Oregon’s renewable energy capacity.
The Sunstone Solar project is part of a broader trend toward larger and more integrated renewable energy systems. Across the U.S., solar installations reached record levels in 2024, with 34 gigawatts of utility-scale solar added to the grid—a 74% increase from the previous year. Battery storage capacity also dramatically rose, nearly doubling to 13 gigawatts.
These projects are increasing in number and scale. The average size of solar farms in the U.S. has grown sixfold over the past decade, from 10 megawatts in 2014 to 65 megawatts in 2024. Battery storage projects are expanding even faster, with average capacities 15 times larger than in 2019. Economies of scale are a key driver, as larger projects reduce costs per watt and improve overall efficiency.
The Oregon solar plus system represents a significant advancement in renewable energy technology. By combining solar panels with battery storage, the project can store excess energy generated during peak sunlight hours and distribute it when needed. This approach addresses one of the main challenges of solar power—its intermittency—and ensures a more reliable energy supply.
Yayoi Sekine, head of energy storage research at BloombergNEF, notes that solar-plus-battery projects are becoming increasingly common, especially in regions with high solar generation. “We’ve seen more examples of projects with longer-duration storage, which is crucial for decarbonizing the grid,” Sekine explained.
The Oregon Solar Plus project stands out for its ambitious storage capacity, offering up to six hours of energy storage. This is notably higher than the industry standard, where most battery plants provide four hours or less. The project’s use of advanced battery technologies, including lithium-ion and emerging zinc-based options, could further reduce costs and improve efficiency.
The Sunstone Solar project is expected to bring Oregon significant economic and environmental benefits. In addition to creating jobs during construction and operation, the project will help the state meet its ambitious clean energy goals. Oregon law requires its two largest electric utilities to achieve 100% carbon-free electricity by 2040, a target requiring a substantial increase in renewable energy capacity.
See also: Oregon Offshore Wind Energy
The project also highlights the potential for renewable energy to coexist with agriculture. Pine Gate Renewables’ investment in local wheat farms demonstrates a commitment to balancing energy development with community needs. This approach could serve as a model for future projects in other regions.
While the Oregon Solar Plus system represents a significant step forward, it also underscores the challenges of scaling up renewable energy. Large-scale projects require significant land use, which can lead to conflicts with local communities and ecosystems. However, as seen in Oregon, careful planning and community engagement can help mitigate these issues.
The project’s success could also pave the way for further innovation in energy storage. Lithium-ion battery costs dropped 20% in 2024 as battery costs continue declining, and longer-duration storage options are becoming more financially viable. This could enable even greater integration of renewable energy into the grid.
The Oregon Solar Plus project proves the growing potential of solar plus systems to transform the energy landscape. Oregon is setting a new standard for renewable energy development by combining large-scale solar generation with advanced storage capabilities.
As the U.S. transitions toward cleaner energy sources, projects like Sunstone Solar will be critical in reducing carbon emissions and ensuring a sustainable future. With its innovative approach and community-focused initiatives, the Oregon solar-plus system is a shining example of what’s possible when technology, policy, and collaboration come together.
