The United States has reached a milestone with sufficient solar power capacity installed to supply electricity to roughly 50 million homes, representing approximately one-third of the nation’s residential base. This achievement is documented in the latest US Solar Market Insight report, a collaborative effort between the Solar Energy Industries Association and Wood Mackenzie.
The second quarter of 2026 saw 11.4 gigawatts of direct current solar capacity added to the grid. This installation rate marked substantial growth compared to the previous year’s corresponding period, which saw a 45% increase, and also exceeded the first quarter of 2026 by 43%. The expansion reflects ongoing momentum within the solar sector despite shifting political dynamics at the federal level.
Utility-scale solar projects drove the majority of recent growth, accounting for 9.6 GWdc of the total 11.4 GWdc installed during the quarter. This utility segment alone increased by 61% compared to the same period last year. Industry sources indicate that a substantial portion of this activity reflects developers accelerating project timelines to meet the July 2026 safe harbor deadline for tax credit qualification.
When combined with battery storage installations, solar and energy storage technologies accounted for 70% of all new power generation capacity added during the second quarter. Industry analysts project that robust project pipelines and the development of safe-harbored capacity will sustain approximately 44 GWdc in annual installations through 2031. However, permitting processes and the transition period following the phase-out of the investment tax credit remain identified as significant obstacles to sustained growth.
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