I'm thinking specifically about states like Arizona, though I'm not sure of the current situation there being >1000 miles away. I know they had attempts to add a $100/month fee for connecting solar systems to the grid, plus assorted other licensing and regulatory requirements.

Mining equipment can also be older models no longer cost effective to mine with when you're paying for utility power.

If anyone's still checking a thread a few days old, I was talking about things like Florida's requirement that even if you're capable of being fully independent you be connected to the grid: http://www.wftv.com/news/local/want-solar-panels-you-still-h...

A side effect of that is that if the grid is down, you're also required to shut down your solar system (which makes complete sense, it's a safety thing to not have power sources connected while there's work being done) except that you're apparently not allowed to disconnect.

Discussion on [1] notes that disconnectable systems can be quite a bit more expensive, but it sounds like that's not even a legal option - no connection, no occupancy.

[1] https://www.dailykos.com/stories/2017/9/18/1699490/-Solar-Po...

Parent explicitly talks about situations in which you can't just sell your excess power.