planning 6.6kw solar + battery setup on my north facing roof in northern sydney

ive been planning this for months on my house in wahroonga with a solid north facing roof and decent sun exposure. electricity bills have been killing us especially with the ac running all summer and i want backup power for outages so im going with around 6.6kw of panels plus a 10kwh battery.

ive done a lot of research on components myself and im handling some basic prep work like cleaning the roof and running conduit but for the actual install i plan to use renewco solar for the full professional installation of the panels inverter and battery system since theyre local in nsw with good support.

has anyone here mixed diy prep with a pro solar company in australia? any tips on what to prep before they show up?

thanks heaps guys appreciate the real talk.