US aluminum is poised for a comeback — if it overcomes these hurdles

The U.S. aluminum industry is growing again after years of decline, driven by tariffs on imported aluminum and rising electricity demand nationwide. Century Aluminum has restarted full production at its Mount Holly smelter in South Carolina, raising the country's total aluminum output by nearly 10 percent. The company is also planning a much larger smelter in Inola, Oklahoma, backed by a $500 million federal grant, though the project faces pushback from state officials and tribal nations over concerns about air and water pollution near the site. Separately, Magnitude 7 Metals plans to partially restart its idled smelter in New Madrid, Missouri, later this year, crediting new tariffs for making the move worthwhile.

None of this points to a direct rebate or program for homeowners. But it matters for anyone thinking about home energy upgrades because aluminum smelters use enormous amounts of continuous electricity, and their expansion adds to competition for power on local grids. In Missouri, for example, a new "large load" electricity policy meant to make big power users like data centers pay for grid upgrades could also apply to the aluminum plant, raising questions about whether it will run on cheaper clean energy or costlier fossil fuel power. How these smelters get their electricity, whether from coal, gas, wind, or solar, will shape regional power costs and pollution levels, which can indirectly affect electricity rates and grid reliability in the years ahead.