I suspect roughly similar to the initial European colonies in the "new world". The first 100 years or so will be dominated by big corps wanting new resources, and religious zealots wanting "freedom" from the old rules. Just like in the 1500s, only groups with deep pockets will be able to go initially. If those colonies take foot, and become self sufficient (this was really hard in the early "new world" colonization days, many many colonies just died off, the ones that didn't made history) then eventually "regular" people will be able to go. One can assume that human nature won't change over the next 500 years, and you'll have the same kind of gov'ts you have today. Local leaders under a higher level state/country leader. etc

True, they make a "megapack" or something that is being installed grid scale. I own two powerwalls and Solar (bought before Elon went off the deepend, but I think the economics are still about the best for Tesla Solar). So my generation is on the roof (I never charge from the grid, except for an impending storm). My current reading match up about with the spec sheet (for Month to date in Nov : 287kWhr in and 250kWhr out (and battery 87% charged as of noon, it normally charges to 100% by about 1pm if I'm not doing a lot of high energy items at home)

77% isn't great for batteries (For example Tesla's Powerwalls are 90% round trip efficient (you get 90% useable A/C power for the 100% you put in (includes all the AC->DC->AC steps, plus battery losses)

Of course if these are 40% cheaper, than that's what really matters for some power sources. Especially as we super saturate with solar and other.