[dariusj18]

Creating and maintaining a electric grid requires scale, it's one of the main reasons municipalities grant exclusive monopolies to power companies, because competition doesn't really work in the space. At certain low thresholds the system can absorb people going "off the grid", but too many and it becomes economically unstable. Forcing a rise in rates and a cascade effect. By requiring people to remain attached to the grid and sell off their unused power the benefit to all is clear.