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 5830 Watt Grid-Tied Solar Kit. Generate Between 310kWh and 723kWh of Electricity Per Month, Includes 22 Polycrystalline Solar Panels, SolarEdge 5000 Inverter with Power Optimizers, Roof-top Mounting System.