The agreement, supported by the Environmental Law & Policy Center (ELPC), Iowa Environmental Council (IEC), and Sierra Club, reflects both utility and environmental modeling that identified solar as the most cost-effective option for Iowa’s future energy needs.
“Building solar is a no-regrets choice for Iowans: It provides consistent, clean power and moves Iowa toward a renewable energy future,” said Josh Mandelbaum, Senior Attorney at ELPC, in the September 11 announcement.
Iowa has long been a national leader in wind energy, which provided 66% of the state’s electricity in 2024. Yet solar still represented only 1% of generation. Adding 800 MW of new solar is a significant shift toward diversifying Iowa’s renewable portfolio while reducing reliance on coal, which continues to impose high health and environmental costs.
According to the 2025 Iowa Electric Generation: Condition of the State Report, coal plants in Iowa emitted over 14 million tons of carbon dioxide in 2024, contributing to health care costs estimated between $110–150 million annually, and reducing statewide corn yields by up to 330 million bushels per year due to affects of air pollution.
The settlement not only approves new solar generation but also establishes a resource planning process that requires MidAmerican to evaluate coal plant retirements and replacement options. This adds transparency and gives stakeholders more input into Iowa’s energy direction.
“Resource planning is critical for evaluating the energy resources that will be most beneficial for customers,” said Josh Smith, Senior Attorney at Sierra Club. “This planning process will provide needed transparency into the direction of Iowa’s energy generation.”
The timing is critical. Federal clean energy tax credits are scheduled to phase out under the One Big Beautiful Bill Act, which requires solar projects to begin construction before July 2026 to qualify. That makes the Commission’s decision both a financial and strategic win for Iowa customers.
“Solar is a cost-effective resource even without tax credits, but the opportunity to use tax credits for this project makes it a clear win for Iowa customers,” said Steve Guyer, Senior Energy Policy Counsel at IEC.
With load growth projected to rise 30–60% by 2044 because of data centers in Iowa and electrification, the Commission’s approval positions the state to balance economic growth with cleaner, more affordable energy.
