off the grid
adv.
- Outside the predominant system(s) of society.
Usually off the grid refers specifically to electricity generation, but its use is widening:
At dinner I mentioned that this was probably the all-time most local meal I’d ever eaten. Teresa joked that if Joel and Daniel could just figure out how to mill paper towels and toilet paper from the trees on the farm, she’d never have to go to the supermarket. It was true: We were eating almost completely off the grid. —Michael Pollan, The Omnivore’s Dilemma