September 30, 2026 - The United States is adding record amounts of renewable energy capacity, but an industry warning of a sharp slowdown as soon as 2028 is drawing attention to federal policy and the future supply of electricity.

The American Clean Power Association’s warning comes as lawmakers negotiate changes to energy permitting and utilities prepare for growing demand from data centers and manufacturing.

The industry’s latest construction figures remain strong. In its September 3 report, ACP said developers brought 164 utility-scale solar, wind and battery storage projects online during the second quarter, adding 17.1 gigawatts of capacity. The association described both the second quarter and the first half of 2026 as records for deployment.

Second-quarter additions included 7.4 GW of solar, nearly 5 GW of land-based wind and 4.7 GW of battery storage. However, the land-based wind project pipeline declined 4% from the previous quarter, with ACP identifying federal permitting and review delays as threats to future development.

The distinction between projects being completed and projects moving through development is central to the debate. Strong installations today can coincide with obstacles affecting the next generation of power projects.

In its February outlook, the U.S. Energy Information Administration reported plans for a record 86 GW of utility-scale capacity additions in 2026, if all scheduled projects were completed. Solar accounted for 51% of the planned additions, wind for 14% and battery storage for 28%.

Those figures describe planned capacity rather than completed construction or electricity generated. EIA also identified 6.3 GW of planned natural gas capacity additions for the year.

The administration has emphasized a different approach. White House energy adviser Jarrod Agen highlighted nuclear power and questioned whether wind and solar could meet rising electricity needs.

Meanwhile, Senators Martin Heinrich, D-N.M., and Sheldon Whitehouse, D-R.I., said September 25 that permitting negotiations remained active and that many major hurdles had been overcome. They stressed the need for legislative text and time for senators to review the proposals before voting.

The senators said their goal was to lower energy costs, support employment and improve how the country builds energy infrastructure. Their statement expressed a commitment to completing legislation during the current Congress.

The debate has implications across the power industry. EIA’s September forecast projects U.S. electricity generation will rise 2.2% in 2026 and another 1.7% in 2027, supported by demand from data centers and manufacturing.

The same forecast places coal’s share of generation at 16% in 2026 and 14% in 2027, while natural gas remains at approximately 40%.

For coal producers, utilities and other energy suppliers, the pace of new construction will help shape future fuel demand and competition. The projected renewable slowdown remains an industry warning, while the outcome of permitting negotiations could influence development across multiple energy sources.