Hi @PhilT
Quotes 1 & 2 look pretty good to me. You’re using 11kWh a day, assuming you’re in a reasonably sunny part of Aus, you’ll generate more than twice that with these 6+kW systems you’re looking at, but as you say the finances probably add up to go that big. And, it just means your neighbours will be using carbon free energy that you’ll exporting to them.
Quote 3 just seems a bit overkill to me. I can’t see why you’d benefit from batteries (and therefore a hybrid inverter), and the Enphase and Solar Edge systems are pretty good. The bigger size systems do seem like overkill to me.
You seem to be weighing up the right options. I’d suggest going with the company you feel most comfortable with out of Option 1 and 2.
Hope that helps.
Cheers
Marty