900 MW Mammoth Solar Project Completed in Indiana

On October 7, 2026, Doral Renewables completed the final 900 MW phase of the Mammoth solar project in Indiana, bringing the facility’s total capacity to 1.3 GW. The site employs an agrivoltaic model, where livestock such as sheep and alpacas graze beneath the solar panels. This arrangement provides farmers with a steady secondary income, a benefit that has become increasingly relevant as fuel costs rise. By allowing for the dual use of the land, the project maintains agricultural activity alongside large-scale power generation.

The agrivoltaic concept has seen growing interest since Doral Renewables first broke ground in 2022. The project spans land leased from more than 65 families across Starke and Pulaski counties in northwest Indiana. Construction of this final 900 MW phase took 18 months, a pace driven by the rising regional demand for electricity. Indiana Secretary of Energy Suzanne Jaworowski noted that the project is a significant factor in local economic development and addresses a clear need for more power on the grid.

When the initial 400 MW were commissioned, the Mammoth site was already home to roughly 2,000 grazing animals. These livestock manage the vegetation naturally, which reduces the need for mechanical mowing and lowers overall fuel consumption. This approach helps maintain the solar installation while keeping the soil healthy and productive for future agricultural use.

The Mammoth project marks a shift toward generating renewable energy without sacrificing agricultural land. Unlike traditional real estate developments, solar installations cause minimal disruption to the ground; if the panels are eventually removed, the land can return to its original farming state. This is particularly important in areas where farmland is often threatened by more permanent types of development. The project also supported the regional economy through the use of 20,000 tons of steel produced by Indiana’s own manufacturing sector.

Looking ahead, Doral Renewables intends to explore further agrivoltaic uses at the site, including the cultivation of specialty crops and expanded grazing. This ongoing commitment points toward a future for energy solutions that work in tandem with local agriculture. As projects like Mammoth become more frequent, they may provide a template for renewable energy production that aligns with existing farming practices across the U.S.