Is it ok to have PV system into shared (household) RCD?

[Risteard]

The easiest and cheapest work round option from what I can see is to remove the right hand RCD and mcb's and replace those 3 with RCBO's then use the two slots from the RCD for the solar and charger so only costing you for 5 Hager rcbos. This would then solve the issue with the wrong MCB that has been fitted!
Personally I would do what @westward10 suggests earlier and replace the whole lot with a new SPD protected type A rcbo populated board with some spare ways in for future expansion!
Sy

The EVSE RCD must interrupt all live conductors, so a single module Hager RCBO won't meet that requirement.