Passing the 100 GW milestone for cumulative U.S. module production marks a historic turning point, but the domestic solar industry’s long-term survival hinges on moving past celebratory groundbreakings and confronting everyday manufacturing realities. During the opening day panel at pv magazine USA Week 2026, industry executives and market analysts discussed how U.S. manufacturing is tackling workforce bottlenecks, equipment sourcing hurdles, and the complex path toward a self-sustaining supply chain.
Reaching the first 100 GW required an estimated $21 billion in capital expenditure over five decades. With billions more flowing in under the Inflation Reduction Act, the conversation has shifted squarely from raising capital to achieving sustained factory utilization and profitability.
“The big question is: can the level of investment now provide a manufacturing landscape that is sustainable?” asked Finlay Colville, founder and head of Terawatt PV Research. “Having manufacturing that’s profitable and having a policy framework where the certainty level can be a few years—I think that’s the biggest issue now.”
While institutional investors continue backing the sector, operational execution on the ground remains an uphill climb. Training enough skilled operators to run complex, automated lines is a major bottleneck. Qcells Global Chief Technology Officer Danielle Merfeld emphasized that managing an integrated facility under one roof requires extraordinary coordination across distinct production stages, moving far beyond assembling finished components from disparate parts.
“The hardest part isn’t any one of the single processes that we have,” Merfeld explained. “It’s orchestrating the ingot, wafer, cell, and module—each of which is a factory within its own technology and materials that just happens to be under one roof.”
Beyond managing internal factory orchestration, companies are actively rethinking how physical campus layouts impact project economics. For SEG Solar, scaling up production in Houston involved partnering closely with community colleges, local universities like Texas A&M, and drawing on the region’s existing manufacturing base. By strategically co-locating subcomponents such as backsheets and junction boxes right on the corporate campus, SEG has been able to trim transportation expenses and protect internal margins. Elaborating on this vertically integrated strategy, SEG CEO and President Jim Wood noted that operational efficiency allows the business to thrive independently of federal incentive structures.
“As we integrate each one of those components into our business, we’re able to hold onto that margin,” Wood said. “Even without the 45X tax credits, we’re a profitable business with or without those tax credits.”
Quality control and independent testing are also taking center stage as developers and financiers demand rigorous proof of long-term field reliability. Zennia Villanueva, Vice President of Quality at RETC, noted that new domestic manufacturers are flooding testing labs with prototypes and batch-testing requests to catch process variations early before modules reach commercial deployment.
“They are pretty conscious and want to make sure the quality is there, so we receive a lot of prototypes to be tested and requests for batch testing to make sure there’s consistency across different lots,” Villanueva observed.
Looking ahead, panelists debated whether a 100% self-sustaining domestic supply chain is realistic or even strategically sound. Colville argued that attempting to build every upstream material from scratch within a tight timeframe risks creating expensive, low-quality products that cannot compete globally. Instead, he advocates for identifying targeted domestic priorities while maintaining pragmatic trade relationships for specialized upstream materials. Highing the risk of forced isolationism, Colville warned against unrealistic expectations for complete self-reliance.
“The idea that within a few years it’s going to be 100% silicon-based is absolutely not going to happen—or if it does, you’ll get a lot of low-quality, expensive product that’s not as good as what you can buy falling off the back of a lorry in Shanghai for pennies,” Colville warned.
Ultimately, bridging the gap between ambitious manufacturing announcements and commercial execution will require a pragmatic balancing act. As the U.S. solar sector digests evolving trade policies, navigates impending Section 232 import guidelines, and scales up regional workforces, the ultimate measure of success will not be headline-grabbing capex figures, but long-term asset bankability and sustained manufacturing profitability.
To learn more, listen to the full hour discussion from pv magazine USA week 2026 below at 1:07:20:
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