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.
Grapes, either European or American variety, are grown in the United States. European grapes are harvested in California, mostly for making and drying raisins, while American grapes are mostly used in making jam, jelly, juice, and other food products. There are many varieties of table grapes, ranging from white, black, green, and ruby-red.