$3 is a score!
Will not work with wind.
"Back in the day", I considered using them for solar.
The price was a little more than what I thought were better units at the time, but a lot of dealers and installers went with them. I know there are a lot of them still working around this area, though mostly the 4 or 8A units.
I do not know about the larger units like that one, since an 8A array around here is still consided fairly large. Not a whole lot of 16A arrays around here over than 5 years old... if you know what I mean.