Sorry, I'm not following, because when you refer to POI, I'm not clear on which physical location you mean. I understand the PV is on the carport, as is the combiner panel, and that the meter is not on the carport. And that you apparently wanted OCPD at the meter, rather than run service conductors to the carport.
So if the fire department's disconnect is on the carport, it makes sense: you have OCPD at the meter by choice, you're required to have the fire department disconnect, and you chose to use a main breaker combiner panel instead of an MLO panel. But if the disconnect is next to the meter, the panel between the disconnect and the meter is completely redundant, I would think.
I don't mean to make a big deal out of this, it just seems weird to have three OCPD in a row that are all doing the same thing (with the possible exception of the first one after the meter, which is shown as 400A, but that one could be 300A, also.)
Cheers, Wayne