Trempealeau County, Wisconsin

Osseo Solar

A proposed 80-megawatt solar farm and 80-megawatt battery energy storage project in Trempealeau County, Wisconsin.

At a Glance

Project by the Numbers

150 MW
Solar Power
Maximum installed solar generation capacity
150 MW / 4h
Battery Storage
Battery power capacity and duration
20,750
Homes Powered
Estimated households supplied with electricity per year
134,000 tCO₂e
Carbon Emissions Reduced
Estimated annual reduction in carbon dioxide equivalent emissions
Why This Project

A Clean Economic Opportunity for Wisconsin

Osseo Solar will bring clean, locally generated energy to Trempealeau County while delivering lasting economic benefits to the communities that host it. The project is expected to create local construction jobs, generate new earnings for area businesses, and provide annual tax revenue that supports township and county services — including schools, roads, and public infrastructure — for decades to come.

Job Opportunities

Osseo Solar is expected to create approximately 64 local construction jobs in Trempealeau County, bringing new employment and economic activity to the region during the build phase.

Economic Benefits

The project will generate significant local tax revenue for Trempealeau County over its operational lifetime, helping fund schools, roads, and essential public services for years to come.

Wisconsin-Made Clean Energy

Osseo Solar will generate up to 80 MW of clean electricity right here in Trempealeau County, paired with an 80 MW battery storage system to deliver reliable, locally produced energy to the grid.

Why This Project

From Vision to Reality

Osseo Solar follows a transparent, multi-phase development process — from initial site selection through construction and long-term operation. Learn about each step and what to expect along the way.
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Why This Project

Why This Project in Trempealeau County, Wisconsin

Osseo Solar is strategically sited in Trempealeau County, delivering clean power into the Wisconsin grid and supporting local communities with reliable, locally generated energy backed by battery storage.

  • 80 MW utility-scale solar facility with 80 MW / 320 MWh battery storage
  • Delivers power into the Wisconsin grid
  • Located on agricultural land with minimal footprint
  • Designed to complement the existing local landscape and infrastructure
Learn more about the project
Owner & Operator

About Atlantica

Atlantica is a sustainable infrastructure company engaged across the entire project lifecycle — from origination, development, and financing to construction and long-term operational management. With over 3.6 GW in operation and 54 operating assets across North America, Europe, and South America, Atlantica is committed to powering the energy transition.
Visit Atlantica.com
Gallery

The Project in Pictures

Latest News

Project Updates

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FAQ

Common Questions

Quick answers to the most frequently asked questions about the project.

Commercial operation is currently expected in 2029, subject to permitting, interconnection, and construction timelines.

Construction is currently targeted to begin in 2028, following completion of permitting, interconnection agreements, and final engineering. As with all large infrastructure projects, the schedule may adjust based on regulatory approvals and market conditions.

The project will contribute to local tax revenues, support short-term construction jobs, provide long-term clean energy benefits, and help strengthen regional energy reliability.

The project includes up to 150 MWac of solar generation and a battery energy storage system rated at up to 150 MW with a four-hour duration.

Get in Touch

Have questions about the project?

Our team is here to answer any questions you may have about the Osseo Solar project. Reach out and we’ll get back to you as soon as possible.