I've looked into it. My understanding is commercial installs are more sensitive to efficiency than consumers. I believe it's far more economical for them to sq

I've looked into it. My understanding is commercial installs are more sensitive to efficiency than consumers. I believe it's far more economical for them to squeeze everything they can out of an acreage than it is to simply build new. Between panels losing efficiency and newer, more efficient panels coming on the market, commercial installs tend to cycle out panels well before the end of their life. This leaves a second-hand market with some pretty crazy discounts.