Signal July 4 tax-credit deadline pressures US solar/wind project pipeline; $17B federal loan for 10 nuclear reactors

Summary

Under the One Big Beautiful Bill Act's Section 48E(e)(4), wind and solar facilities over 1.5 MW that begin construction after July 4, 2026 lose eligibility for tax credits unless placed in service by December 31, 2027; projects that start construction by July 4 instead get four years to completion, and Treasury has tightened the "beginning of construction" test to require physical work of significant nature (though a court ruling in Oregon Environmental Council v. IRS restored an alternative method many developers rely on). Industry data from Wood Mackenzie suggests about 85% of safe-harbored projects had already secured that status before December 2025, though smaller developers may still miss the deadline. Separately, the Department of Energy announced $17.5 billion in loans (across five special-purpose vehicles, each requiring nearly $1 billion in equity from Westinghouse and partners) to build 10 large AP1000 nuclear reactors at five sites, each generating 1.1 gigawatts — a combined output equivalent to power for nearly 10 million households — with Energy Secretary Chris Wright saying the loans could speed timelines by up to three years; construction could begin by 2030 with reactors operational in the mid-2030s. Nuclear safety expert Edwin Lyman called the loans "a drop in the bucket" against likely total project costs approaching $200 billion, noting no reactor project yet has an actual construction contract. The nuclear push responds to surging power demand from data centers, following the loan office's cancellation of nearly $30 billion in Biden-era clean-energy loans.