Hi @AJA
What suburb are you in in Perth?
That is sad to here. It can get pretty cut throat when you have people making their livelihood trying to outsell someone else, and taking advantage of the confusion due to so many different products. It’s unfortunate.
The quote that appeals to me is the SMA with Qcells, because the inverter is top quality, and panels are good. The Q.maxx I believe are the Chinese made version of their Q.PEAK DUO G5, which is made in Korea. The Qmaxx is a good panel. I’d find it hard to justify paying top dollar for Sunpower personally, I don’t think the premium you are likely needing to pay would be worth the additional performance over the Q.Cells. Plus, Sunpower is in a bit of a transition into splitting the company into two, which creates a bit of uncertainty.
I don’t think that’s a consideration. A high wattage panel doesn’t mean anything about the quality, and little about performance.
Hope that helps
Marty