Here’s the complete list of American solar panel manufacturers:

Solar manufactures 2018
Auxin Solar – San Jose, CA
First Solar – Perrysberg, OH
Global Solar Energy – Tucson, AZ
Heliene – Mountain Iron, MN
Itek Energy – Bellingham, WA
Mission Solar – San Antonio, TX
Seraphim – Jackson, MS
Solaria – Fremont, CA
SolarTech Universal – Riviera Beach, FL
SolarWorld – Hillsboro, OR
Suniva – Norcross, GA
SunPower – San Jose, CA
SunSpark – Riverside, CA
Tesla/Panasonic – Buffalo, NY

Any of the 5 could have been suppliers for SNPW.