Hi Gerry
Interesting one, thanks for laying the quotes out nicely. I like that you are looking at optimisers/micros.
Quote 1 - I guess it comes down to why you are buying solar, but presuming you are somewhat interested in financial reasons, it seems like spending $13k+ would make your payback unnecessarily long.
Quote 2 and 3 is a toss up for me. I personally probably wouldn’t pay an extra $2.6k for the LGs don’t know much about the SolarEdge Smart Panels, but SolarEdge is a very respectable inverter manufacturer, I would presume they would team up with a decent panel manufacturer to build these.
Longi is liked reasonably well by installers in Australia, although it doesn’t make our top 10 list.
As always, the most important thing is that you are very confident with the installer/company that you are buying from. So if you are tossing up two, let that be the deciding factor, and ask the questions that I have put in the Guide to Buying Solar.
Cheers
Marty