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I bought 42 Sunpower X21-335 panels used for about $4700 shipped to my door a few years ago and couldn't be happier. As far as I could tell they weren't actuall

I bought 42 Sunpower X21-335 panels used for about $4700 shipped to my door a few years ago and couldn't be happier. As far as I could tell they weren't actually ever unboxed.

ncmncm 5y ago
For the numerically challenged, that is $4700/42 = $112 each. $112/335W = $0.33 per watt. Installed, well under $1.
- zbrozek 4y ago
  Yeah, the whole system has been fantastic. I'm so glad I did it. DIYing it was also fun.