wa8yxm wrote:
What is wrong with "Just shutting off the main breaker"
It's also illegal in most places because it's dangerous. The neutral / ground is bonded right through the mains and meter base, therefore back-feeding your house will create potential in the entire neutral circuit on the grid around your house.
When the electrical authority up here detects such a setup they just cut off the service to the home and tell the homeowners to get their wiring repaired / brought up to code and call for a re-inspection when done.