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.
Solar farms. In July 2012, Michigan's largest rooftop array, 977.6 kW, was installed in Canton on the IKEA store. Ford Motor Company and DTE Energy built the largest solar plant in the state, a 1.04 MW solar car port at Ford's world headquarters in Dearborn, Michigan in 2015. In 2015, DTE built a 1.1 MW solar farm at Domino's Farms near Ann Arbor, slightly larger than the Ford carport.