Relatively common site here, and other parts of the world I'd suspect.....
Likely same your side of the border, I've noticed an explosion of self-storage facilities the last 40 years (Do we have too much Junk ?... but that's another thread....

). I've noticed many self-storage places here, totally roofed over with PV panels.
Rgds, D.
Interesting comment as I have a good friend that owns a large storage facility.
Just recently he has been approached by a buyer and and expecting an offer shortly.
Then along came a second buyer that is (today), going to make an 'on the spot' offer.
We are talking serious $$'s from large well funded organizations.
Word is that there is an actual bidding war to buy up storage facilities.
His facility is in a prime location, heavy with retired seniors, close to a major city, lots of condos* and heavy with comfortable retirees, with tons of trails, skiing and lakes everywhere.
In fact recognized as the fastest growing population area in the province.
*Condo storage is typically minimal and can't accommodate all those seasonal toys and sports items that active retirees enjoy.
Forever he's been at 99% capacity with an endless waiting list. More than a few times he's needed to 'hot swap' lockers and often temporally accommodate in makeshift locals.
Having adequate land he's added shipping containers that suit many trades but presently even those are no longer affordable.
Another bonus is that he can park close to 100 RV's plus has a vehicle rental franchise.
I believe he'll retire shortly!