I don't know why we don't make it mandatory for all new houses to have a 6kw array on the roof.
6 KW is a huge powerplant to add to the top of your house and people forget that you need to maintain them. I discovered this when my isolation switch "wore out" and started a house fire. Lucky I was home as it could have burnt the house down. I'm on my second inverter too. A bit annoyed about that as I spent the bucks to buy the "premium" Fronious. German quality etc etc etc. Regular servicing of your solar installation is something most people don't regularly do.
On the positive side solar has been around for quite awhile now. Having to check if it's still safe is something new to most people as their solar installation may be getting old now and things like the Aussie sun and rain can be pretty tough on them..