I have a 7.3 powerstroke (actually T444E - the year before Ford bought Navistar!), and I haven't modded it yet, so I run just plain diesel.

Mechanically, almost every component is a single-point-of-failure: drivetrain, brakes, cooling system, etc.

But I don't actually move all that much; I only move from place to place maybe a dozen times a year - less some years.

And while I'm stationary, it's pretty easy for me to have fully off-grid power. And a composting toilet lasts me a full loop around the USA without needing to empty the solid container.

But I didn't mean for my point to be about mobile living, just identifying that one of the main benefits of solar as opposed to nuclear is that control over power distribution can be scaled radically downward.