I have a 15Kw gas generator that I will just plug into the panel box and back feed the entire house. I just haven't had time to complete the project since changing to the new panel box this summer. I guess I should get on this.
The breaker the plug is connected to has a sliding mechanism that only allows the breaker to be turned on when the main breaker is off, as to not back feed the grid and cause harm to anyone working on the lines.