Understanding feasibility of additional consumer board for Solar

Crash

Hi folks,

wanted to pick some better educated brains on this one. I would like to look at adding Solar panels, along with getting a car charger and an external socket put in. Our Consumer board is right in the center of the house, while the ESB meter, ESB fuse, and 63 amp breaker are all in the converted garage by the outside wall. I'm wondering whether it's feasible to put in a second Consumer Board into the 63 amp breaker, and have the panels / battery / inverter connected into that, or will there be issues due to it not being on the same CB as the rest of the house? It's a quick drill away from the outside, and so a lot less damage, repainting, disruption etc. if I could, for instance, put the Solar Panels on roof, battery in the attic space, then bring the cable back down and into the house alongside where the mains enters the house already.

Diagram below hopefully describes this.

10-10-20

It's looks do-able but I'd expect that the electrician may prefer to install the new CU directly off the main ESB fuse and then wire the older CU as a secondary to that board. A lot easier to do it that way than have two boards off the same main fuse.