I mentioned the article freebird shared to a friend and he responded "Batteries FTW."
FTW must mean something different than I thought--and so must his PhD.
I was not going to say "This knowledgeable-sounding guy in my forums," so I looked for a source to support Oil Pan:
It can cost $15,000 to install solar panels on a house and enough batteries to run the air conditioner for three hours would cost another $15,000. The RoI on solar is about eight years, the warranty is ten, and a full battery array would not pay for itself until six years after the warranty expires.
https://www.azcentral.com/story/mone...els/772014002/