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.
A solar plant in the Mojave Desert â the largest of its kind in the world â officially opened Thursday, and began providing energy to customers in California. The opening is seen as a milestone for a growing industry that is testing the balance between wilderness conservation and the pursuit of green energy across the American West.