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.
Functional and efficient solar panels ( PV as we know it today ) were implemented in the US by NASA for use in space in 1958 , although underlying concepts were identified by a French physicist as early as 1839 ; solar cells were patented in US in 1888 by Ed Weston ; 1901 Tessla patented  utilization  of same , and Bell labs exhibited a solar cell ...