Wood Mackenzie Reports US Solar Installations Declined In Q1 2026 Despite Continued Dominance In New Power Capacity

The US solar industry installed 7.8 GWdc of new solar capacity during the first quarter of 2026, representing a 27% decline compared to the same period last year and a 42% decrease from the previous quarter. While the figures may appear concerning at first glance, industry analysts note that such declines are largely consistent with typical first-quarter seasonality and do not necessarily indicate a weakening market.

Despite the slowdown in installations, solar remained the leading source of new electricity generation capacity in the United States during the quarter. Solar energy accounted for 60% of all new power-generating capacity added in Q1 2026. When combined with battery storage, the two technologies represented an impressive 91% of all new capacity additions, highlighting their growing importance in meeting the country’s rising energy demand.

However, the industry’s future growth trajectory faces a number of challenges. According to the latest US Solar Market Insight Q2 2026 report, published by Wood Mackenzie in collaboration with the Solar Energy Industries Association (SEIA), factors such as changing trade policies, financing pressures, expiring tax incentives, and permitting delays are creating uncertainty for the sector at a time when demand for clean energy continues to grow.

One of the strongest supports for near-term growth is the large pipeline of utility-scale projects that have been “safe-harbored” under existing policy frameworks. Wood Mackenzie estimates that between 216 GWdc and 240 GWdc of utility-scale solar capacity falls into this category, with most projects securing their status before the implementation of Foreign Entity of Concern (FEOC) requirements under the One Big Beautiful Bill Act at the end of 2025.

Even after accounting for project cancellations and delays, this pipeline is expected to support significant solar deployment through the end of the decade.Demand from corporate buyers also remains strong. During the first quarter of 2026, approximately 6.3 GWdc of solar capacity was contracted, marking a 15% increase compared to the previous year.

Much of this activity was driven by projects in Texas, where technology companies and data center operators continue to secure renewable energy supplies through long-term power purchase agreements. Project execution has also remained strong, with most projects being completed according to schedule, demonstrating the industry’s ability to deliver large-scale developments efficiently.

At the same time, the domestic solar manufacturing sector faces growing challenges. The US Department of Commerce announced preliminary anti-dumping and countervailing duties on solar cells and modules imported from India, Indonesia, and Laos during the spring of 2026. These measures add to existing tariffs on products from Malaysia, Thailand, and Vietnam. Collectively, these six countries supplied nearly 78% of US solar cell imports last year, making the new trade actions highly significant for the industry.

Further uncertainty stems from an expected Section 232 trade action targeting solar-grade polysilicon and related products, which could impact domestic manufacturing operations. While US module manufacturing capacity has expanded rapidly and is now capable of producing roughly 70% of the modules required to meet 2025 installation levels, domestic cell manufacturing remains limited.

The country currently has only about 3 GWdc of solar cell production capacity, leaving many module manufacturers dependent on imported components.Several companies are planning new cell manufacturing facilities, but investment decisions have been slowed by uncertainty surrounding FEOC regulations.

Industry participants are still awaiting comprehensive guidance on how these requirements will be implemented, making it difficult to evaluate future project economics and supply chain strategies. With important compliance deadlines approaching, developers and manufacturers are being forced to make critical decisions without complete regulatory clarity.Looking ahead, Wood Mackenzie’s base-case forecast projects average annual solar installations of approximately 43 GWdc between 2026 and 2031.

If achieved, this would double the size of the US solar fleet over the next five years. While this represents substantial overall growth, annual installation volumes are expected to remain relatively flat compared to recent years, indicating a slower pace of expansion than the industry experienced during previous growth cycles.

The distributed solar market is expected to face greater near-term challenges. Residential solar installations are projected to decline by 21% in 2026 following the expiration of the Section 25D residential tax credit at the end of 2025. The commercial solar segment is also expected to experience a temporary downturn, largely due to California’s transition away from the NEM 2.0 net metering framework.

Analysts expect both segments to recover over time. The residential market is forecast to begin rebounding in 2027, while commercial solar is expected to recover by 2028. Factors supporting this recovery include the growing adoption of third-party ownership models, rising retail electricity prices, and the continued development of projects that secured favorable policy treatment before recent regulatory changes.

Overall, the industry’s long-term outlook remains positive, but growth is expected to be constrained by several structural challenges. Interconnection delays, permitting bottlenecks, trade uncertainty, and the gradual phase-out of federal incentives continue to limit the speed at which strong market demand can be converted into completed projects.

According to the report, addressing these barriers will be critical if the United States is to meet its clean energy goals while keeping pace with rapidly growing electricity demand from industries, businesses, and emerging technologies.