Hi @Jpg, terribly sorry for missing this one, just realised it was sitting there without an answer.
Those are really good products, and I think the price is fine.
So, as we always say, make sure you are confident and happy with the installer. If any doubts about their reviews etc, get a few more quotes.
All the best, sounds like a good system though.
Marty
https://www.cleanenergyreviews.info/solar-installers/new-south-wales/sydney