i don't like countries that are all uppity and anal-retentive about electrical code and certified electricians and all that, it's a bunch of red-tape BS.
that's why i like old installations better, with baquelite insulators, wooden backing, backelite switches(breakers?, who needs breakers, pfft).
At least over here you can put up a front "for appearances" witha single switch, they give you the ok then you wire your house whoever the hell you want.
in fact my house only has a single main breaker, that's it(apart from the maneuver switch for the generator), no segmented lines and all that BS, single fat line "bus bar" running through the house from which everything is derived/connected.(we wired the entire house ourselves being all technicians and related industries, wouldn't pay a dime for a dude to install it).
and i don't know if solar would be useful for us, roof is small compared the the surface of the house itself and has different shaped segments, plus the 2x 500L water tanks cast shadows, and our consumption is well into the MWh in summer (what with all the computers, aircons, basement workshop and all that)