Only commenting, not trying to sell anything as this is what I do,
BUT...……………
Go with someone you can trust, usually a local smaller operation that relies on word of mouth is the way to go.
Check products and compare price.
If it's a "can only do this week" price, show them the door.
SMA inverter or Fronius. No seriously nothing else matches.
Reputable panels, and Yes they are all made in China now...….
but there is good and bad.
No LG panels are not worth the extra money, and batteries...…… yeah NO!
Not yet anyway. still takes to long for R.O.I.
If it seems to good to be true, it is.
Retaillers offering installs "free" or at cost for a higher feed in tarrif are a complete rip off. There is always a catch
If you aren't home to use it, don't bother unless you have pool pumps etc that are consuming the power.
Feed in will never give you a return
And finally warranty is only as good as the person standing behind it.
ALWAYS ask for references.
An honest tradie should have plenty.
(You can get all the info you need and get prices from - 3 quotes, but I'd probably remember that these people "Pay" for the leads and are salespeople.)
That said, Neil Finn knows pretty much everything about solar and the site has awesome info, calculators and costs.
Cheers and good luck,
Brian