Great, hopefull, article:

[OKIsItJustMe]

9. "Manufactured homes" are a bit like utility-scale solar

You have a (mostly) stationary workforce, producing house after house. They’re shipped to the job site, and quickly tied down and “tied in" by another workforce. They should (as you have found) be relatively solid/stable.

The promised revolution in 3-D printed houses should be solider still.

As for “selling to the grid” well, you can think of “the grid” as an alternative to a storage battery. That battery in your home won’t pay you anything for the power you put into it, of course, it also won’t charge you for the power you take out. However, my brother was installing residential solar for people who were scared of “Y2K.” Even then, people found grid-connected solar to be the most convenient (of course, that was before products like the Tesla “Powerwall” but I wouldn’t install one of those in my home.)