Yes, the issue is that the 200 and 30 can add, thus exceeding the 200A (E) feeder wire's ampacity.
Re. upgrading the feeder wire...it's 4/0 SE cable (the heavy romex type stuff) inside walls, up several stories.....no way!
Yes, replacing the short and tightly bent conductors from meter to line side of main breaker would physically work (to allow tap) ...........it gets into violating the listing of the combination meter/main, etc. Stuff I do not know much about - but the inspector does....
Yeah, you are right pulling the meter is no problem - and exactly what i would do in order to tap line-side.
Yeah, replacing conductors as above may be an option in the future. I do seriously doubt any mfctr would say yes, though. Why would they, they could only stand to lose.
On the other hand: Let's put it this way, if there were no AHJ, i would do it in a heartbeat: i know my work and would use the right wire. Come to think of it, w/o the photo above....who would know there hadn't always been nice big, pig-tailed loops on the SE conductors...???
I've learned a lot for future reference, that 'll be mighty handy!
Right now i think i got it:
I heard of a 200 AMP branch circuit breaker that i can add to a 200 amp panel!
Turns out, Square D makes it in both HOM and QO. Takes 4 spaces (instead of 2).
This'll plug onto any HOM or QO busbar. So i'll take the (E) 4/0 sub-panel feeder conductors from the (E) 200A main breaker and feed them off of this. Place this (N) 200A breaker in a new subpanel (in the middle of the busbar somehwere) and plug my (N) 2p30A PV Breaker on the bottom.
That should meet 120% rule and "opposite feed" section of said rule.
The things solar will make you do.........