It is FAR more economical to install than it was, but it is still costed such that you have to WANT to install it.
From my prior research (which I have now lost) my best options were to look at solar power as a 15 year payback. Fuel/KWatt cost have gone way up since then, so the payback is likely shorter.
Installation is now FAR simpler and/or far more attractive installed. New panels look like architectural shingles instead of big ugly boxes. Others fit nicely within the ridges of metal roofs. Also they are easily repaired now.
The rub is still making use of the power and storing it. A lot of cost lies therein.
Interesting, thanks.