What about adding a 2nd subpanel vice replacing?
absolutely. That's the way a subpanel is fed. It just gives an extra overcurrent protection for the subpanel, which is finemazzonetv said:If I leave it the way it is now, there would be a 100a breaker in my main panel controlling this sub panel, and another 100a breaker in this panel. Is it ok to have two breakers controlling the same panel?
It does, but the neutrals are still taking up space in the panel, not to mention all of the connections from the circuits being moved to the generator panel. As we have added more circuits, the Panel is getting fuller and fuller and is looking sloppy. While I have all of the walls open I figured it was a good time to install a larger panel and "neaten" everything up.