Shortcircuit: Yes, an additional meter can be installed for a PV, as you described, and will be compliant.
Usually, the intent of the proposed installation as Harold explained is addressed in Plan review. Sometimes, as we are all human, it may get missed, but caught at field inspection.
The solution you stated above, is a usual remedy.
Harold has to get the actual rating of the buss from the existing MDP for starters.
