Hi @mike2
I think it’s worth the extra $1k for Fronius. You can see a thread on Fronius vs Growatt comparison here:
Here’s our Jinko review also. Jinko Cheetah is a pretty run of the mill panel.
The big question as always is whether the company quoting you is reputable. Who gave you the quote, and where in Perth are you? There’s some installers that get good reviews on the web on our Solar Installers Perth page.
Cheers
Marty