The corrugated medium and linerboard board are made of kraft containerboard, a paperboard material usually over 0.01 inches (0.25 mm) thick.
The panels contain cells made in China, Taiwan and, sometimes, Germany. Grape still plans to import inexpensive Chinese-made cells, and to buy Oregon-made inverters -- which convert direct current to alternating current -- for the panels it assembles in Eugene.
As of November 2014, Topaz Solar Farm was the largest PV solar plant in the world at 550 MW AC in central coast area and a second 550-MW plant, the Desert Sunlight Solar Farm is located in the far eastern desert region of Riverside County, California.