I originally intended to switch OFF the MAIN feed breaker from the street and
back feed the power from my generator into the house via a convenient receptacle. I was talked out of that. I Preferred to do the job right. So I called an electrician who I have used before. He didn't seem interested in the job. OH Well.
So much for my support of local business. I figured it wasn't any big deal. I'll figure it out IF it happens again..probably next decade....we rarely lose power here.
Today we had a freakin blizzard and the power went out for 19 hours. The temp outside was 22 F. The temp in the house went down to 48. The local weather said tonight (Sat) the temp outside would go down to 8 degrees. I'm getting desperate.
BEST.......I didn't want to do this..I Switched OFF the Main Breaker from the street and Back Fed the power from my 2000 watt Honda generator into the house. It worked..EXCEPT only to certain circuits. I WANTED the Furnace and the Fridge. NO deal. I got lights in some parts of the house but not the TWO appliances I wanted.
The work room where the furnace is, had lights....but the furnace didn't have power....different circuit I guess.

I'm not an electrician.
GOOD NEWS: The power came back on about 4:30 this afternoon. Temp outside is NOW 18.1 and inside is NOW up to 63.7.
More thought required. NB