I have only seen one episode of Preppers so I am no expert. The show did seem intrusive because many of the “preparing for catastrophe” types are really sensitive to outside interest. Some fear laughter, others fear exposing their hoards to people who might try to take them away from them, and others are just by nature isolationists. Also many of their theories about the impending “end of the world” are just plain incoherent. Thus painful to listen too. Most the off the grid people I know are not Preppers, they are, like me, cheap. They hate giving money to the utility companies.
The literal definition of living off-grid (or offgrid or living off the grid) is living without Utility power or water or waste disposal.
It can go further than this, to include being disconnected from the infrastructures that make life convenient, including roads, banks, schooling, doctors and so on. Even the Internet is a grid of sorts. Wikipedia has an extended discussion
In the absence of Utility electricity, energy needs are often supplied by solar, water or wind energy. (more…)