Minnesota PUC Approves over 475 MW Solar and 50 MW Battery Storage Projects
The Minnesota Public Utilities Commission has approved the Iron Pine and Northern Crescent solar projects, adding over 475 MW of solar capacity and a 50 MW battery energy storage system to the state’s grid.
July 16, 2025. By Mrinmoy Dey
“These approvals represent a significant step forward in Minnesota’s clean energy transition,” said Commission Chair Katie Sieben, further adding, “By expanding our renewable energy portfolio and integrating vital battery storage, we are enhancing the stability and resilience of our electric grid while helping to meet the state’s ambitious energy and climate goals. These projects also bring important economic opportunities to the rural communities that host them.”
The Iron Pine Solar Project received a site permit for a 325 MW solar energy facility in Pine County, along with a route permit for a 1-mile, 230 kV generation tie-line that will connect the project to the grid. The project represents one of the largest single-site solar installations approved in the state and will play a key role in delivering low-cost, clean power to Minnesota’s electric system, noted an official release.
The Northern Crescent Solar Project includes up to 150 MW of alternating current (MWac) solar generation and a 50 MWac battery energy storage system (BESS). The battery system will be housed in a 3.2-acre facility using lithium iron phosphate battery technology. The project will interconnect to the grid via a short 300-foot, 161 kV transmission line to an existing Xcel Energy substation. A final interconnection agreement is expected from the Midcontinent Independent System Operator in the second half of 2025.
“Both projects underwent comprehensive environmental reviews and robust public engagement processes, ensuring that community input and environmental considerations informed each step of development. These approvals reflect the Commission’s continued focus on ensuring Minnesota’s electric system is clean, reliable, and built to meet the needs of future generations,” it said.
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