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.
Grape Solar GS-STAR-100W. Each kit comes with 4 high efficiency Grape Solar GS-STAR-100W crystalline solar panels. The GS-STAR-100W features: A 2-diode junction box for enhanced performance, MC4 connectors on the positive and negative leads for a secure, weather-tight connection.