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.
From the Manufacturer. The Grape Solar 400-Watt Off-Grid Solar Panel Kit is ideal for a variety of applications, including emergency backup systems, RVs, boats, 12 Volt battery charging, small pumps, charging small electronic devices and operating LED lights.