Midwest solar power jumped 116% in a single year, with Missouri alone generating 210,000 MWh despite an ongoing grid upgrade needs. The surge is part of a broader wave of solar growth sweeping across the region, setting new records and powering hundreds of thousands of homes.
The Midcontinent Independent System Operator, known as MISO, hit a solar generation record of 6,887 MW on August 23, 2024. That’s the grid operator covering much of the Midwest. Alliant Energy alone contributed 1,050 MW, which was 15% of MISO’s total solar output that day. At peak production, Alliant’s solar sites powered roughly 400,000 homes for an entire day.
Solar’s share of MISO’s power has grown fast. It went from just 1% to 4.5% in a recent year. Nationally, solar made up over 60% of all new U.S. energy capacity added in the first half of 2024. Experts expect the U.S. to install around 40 gigawatts of solar annually, projected to near that mark starting in 2025.
State-by-state growth has also been striking. Illinois reached roughly 6,187 MW of solar capacity by early 2025, spread across more than 120,000 projects. Michigan’s planning to add 3,600 MW of new solar by 2028, the largest planned addition in the MISO region. South Dakota’s solar generation dramatically increased in 2023. Nebraska’s solar capacity has more than tripled in recent years.
New projects are driving much of this growth. Alliant Energy built over 1,000 MW of solar in Wisconsin and Iowa. A 100 MW project in Indiana sits on 850 acres and powers 20,000 homes. A similar Ohio project powers 20,800 homes. In Illinois, a 270 MW solar farm locked in $630 million in financing and it’s part of a larger 496 MW portfolio, with most of it expected to be running by 2025.
The economic benefits are also adding up. Alliant’s projects created over 3,000 construction jobs and bring in $5 million each year in local taxes and revenue. Midwest clean energy jobs outpaced national averages. Minnesota’s solar employment alone saw strong growth. MISO itself is an independent, not-for-profit organization responsible for keeping power flowing across 15 states and the Canadian province of Manitoba. Major improvements in battery storage technology are also accelerating solar growth, allowing utilities to capture renewable power and distribute it as needed, creating dispatchable renewable power that competes directly with coal and natural gas plants.
References
- https://www.alliantenergy.com/news/news-center/2024/08/082324-solar-generation-record
- https://www.michiganpublic.org/environment-climate-change/2026-03-09/solar-power-surging-in-michigan-midwest-as-renewables-rapidly-gain-ground
- https://www.environmentenergyleader.com/stories/midwest-solar-expansion-adds-200-mw-to-us-grid
- https://cleanenergy.illinois.gov/tracking-illinois-progress/midwest-solar-wind-capacity.html
- https://93energy.com/blog/the-rise-of-solar-energy
- https://centricitysearch.com/clean-energy-rising-the-midwest-is-quietly-powering-the-nations-green-future/
- https://ember-energy.org/latest-insights/solar-met-61-of-us-electricity-demand-growth-in-2025/
- https://www.allenergysolar.com/resources/why-the-midwest-is-the-next-big-solar-market/
- https://www.chooseenergy.com/solar-energy/solar-energy-production-by-state/
