Planned $950 million HJT facility is expected to add 4 GW of annual solar cell manufacturing capacity and create more than 700 local jobs HOUSTON, Oct. 29, 2026 /PRNewswire/ -- SEG Solar ("SEG"), a leading global vertically integrated solar manufacturer, today announced that it has signed a land agreement for a planned $950 million, 4 GW heterojunction (HJT) solar cell plant at its Tomball Industrial Campus in the greater Houston area. 