Scaling U.S. solar manufacturing — what can be learned from SEG Solar?

A solar panel manufacturer called SEG Solar has quickly built up US factory capacity in Texas, growing from a 2-gigawatt plant in Houston, opened in 2024, to a second, 4-gigawatt factory in nearby Tomball. Together the two sites give the company about 6 gigawatts of annual panel-assembly capacity, making it one of only five US companies expected to pass that mark by the end of 2026. This growth followed federal manufacturing incentives created by the 2022 Inflation Reduction Act, which spurred many announcements of new US solar factories, though only a handful of companies actually built and ran them at scale.

For homeowners, this doesn't change rebate programs or installation costs directly, but it points to more US-made solar panels becoming available, which can matter if a purchase requires domestically produced equipment or if trade rules affect panel pricing. The piece also references a recent Section 232 trade ruling that is raising prices on imported solar panels and polysilicon, a factor that could push panel costs up generally.

SEG Solar is now weighing further expansion: staying focused on assembling panels while buying solar cells from other US producers, building its own large-scale cell factory, or eventually developing a fuller US supply chain including cell and wafer production. Whichever path it takes will shape how much of the solar panel supply chain moves onto US soil in the coming years, which could influence availability and pricing for future home solar installations.