It may describe people, things, trends or actions.
Off the grid can describe current events which may be sinister. It may also describe people who have proven themselves so far superior in their chosen field that no one can compare.
It may also describe creativity or genius that's oftentimes so advanced that those who possess oteegee were often decades before their time.
Sometimes, innovation came so far before the general public was ready to accept it, that the originator actually died penniless, as is the case with many "off the grid" artists, engineers and inventors.
Utter genius beyond conventional comparison.
Bob Dylan's off the grid musical talent is so powerful it keeps people buying albums long after his voice has failed him.
Michael Jordan and basketball? One word: oteegee, baby.
9-11's off the grid terror brought America to its knees.
2) One who disdains all recordable common forms of commerce, such as eschewing any form of credit extension, banking services or reportable payroll activities, using only cash so as to avoid any traceable transactions, e.g., living completely 'underground.'
Famous "off the grid" people include such disparate types as environmental champion Daryl Hannah and sociopathic Luddite Ted Kaczynski.
2) Leaving behind no record of his existance other than his birth certificate and social security number, Jim lived totally off the grid.