Indeed, quite a bit packed in there.
I'd be guessing several sets of outside lights on 24h timers or PE cells.
Contactor/TOL sets on the RHS I'd say for irrigation, pool system, bore pump maybe.
Various sets of heating for floors or different areas.
Personally I'd have put all the extra bits in a proper control board in a services room, but you work with what you have.
Best EV Chargers by Electrical2Go! The official electric vehicle charger supplier.
OFFICIAL SPONSORS
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc