Ok, installing a new CU with type 2 SP. The installation has an existing PV 6 panels protected by a 16a MCB at the fuse board. TBH I don't really get too involved with PV systems. But is there anything I am required to to, with regards of further upstream SPs AC and DC side. It doesn't look like additional SPs are present. Also I assume there is not an issue with type A RCBO protection of this circuit.