yes and true if you want want a full system installed.To meet codes you've got to make it so the generator is isolated from the main power feed
But...
You can simply turn off you main meter switch before a Generator start.
It was the Cliff note version.
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When I first installed my 17KW, 24 hours after Hurricane Katrina, we had very few electricians around.
I just clipped my meter seal and twisted my Meter to OFF and did the isolation.
When I build a new house with one, i have a automatic transfer switch with a 25 millisecond switching.
By the way..
My 9KW Boat Genset has an automatic transfer switch too.
Jim...