Submersible Hydropower Rises in the Great Lakes as Trump Slashes Solar and Wind Subsidies

Submersible hydroelectric systems are emerging as a pivotal component of North America’s clean‑energy strategy, especially as the Trump administration eliminates key subsidies for solar and wind. The technology, already proven in Alaska and Maine, is now being deployed in the densely populated Great Lakes corridor, where electricity demand and prices are climbing sharply.

Last month, Ocean Renewable Power Company (ORPC) announced its first urban installation on the St Lawrence River in Montreal, slated to launch two carbon‑fiber turbine units later this year. ORPC’s CEO Stuart Davies highlighted the river’s “consistent, high‑velocity water” and estimated a 60‑90 MW resource potential for the Montreal area alone.

In parallel, ORPC is preparing a second project on the Niagara River near Buffalo, New York, and plans a future deployment on the lower Mississippi River between Baton Rouge and New Orleans.

The timing coincides with record electricity price spikes across the Great Lakes. New York’s public service commission approved substantial rate hikes in September, and further increases are scheduled for 2027, while Michigan and Ohio face similar pressures driven by data‑center expansion.

These economic pressures are driving interest in marine‑based power. Unlike traditional hydropower, ORPC’s devices resemble “push‑lawn‑mower blades” and can generate between 0.5 MW and 5 MW continuously, offering a potential baseload for industrial users and a reliable backup during grid outages.

Environmental considerations remain central. While Quebec benefits from long‑standing, low‑cost hydropower, U.S. projects endure an average eight‑year licensing timeline. Critics worry about impacts on fish and wildlife, though ORPC cites its Alaska deployment—operating since 2019 without recorded fish injuries despite massive salmon migrations—as evidence of minimal ecological risk.

Researchers are also expanding the technology’s reach to slower‑moving waters. University of Michigan professor Michael Bernitsas demonstrated the Vivace system on the St Clair River, capable of harvesting energy from currents as low as 0.5 m/s, suggesting broader applicability across the Great Lakes watershed.

Operating in fresh water offers a distinct advantage: the absence of salt eliminates corrosion, extending turbine lifespan and reducing costs compared with ocean‑based projects. Some European tidal installations have even anchored devices to riverbeds to avoid ice damage, a practice ORPC may adopt.

Financially, the sector benefits from a 40‑50 % investment tax credit that remains intact, even as the Trump administration phases out Biden‑era subsidies for solar and wind. The National Hydropower Association confirms that marine‑energy tax incentives will stay in place through at least 2033, reshaping the competitive landscape and attracting inquiries from entities in over 70 countries.

As electricity bills rise and policy shifts favor alternative renewables, submersible hydropower could become a cornerstone of the Great Lakes’ energy mix, delivering resilient, low‑carbon power while navigating regulatory and environmental hurdles.