Choosing which solar installer and the product best suited for your specific circumstance, should be way easier than it is. There is a lot of industry marketing all vying for your attention, and the more time you try to analyse who is best, and what offering is right for you, you soon realise, this is not a game of easily comparing apples. Panel and inverter quality have dramatic differences, and as with most things in life, you roughly do pay for what you get.
I went for Captain Green Solar for two primary reasons and have not been disappointed. They actually tried to sell me less than what a bevy of extremely eager (and very convincing) sales people from other companies were offering. Secondly, Capt. Green have been in business for over 10 years. I cannot stress how important this second item is. If you do your research, the biggest solar installers in Sydney have all been around before, but operating under different company names that have subsequently dissolved, and by doing so, avoided any warranty against their installed customer base. Sadly, the industry is poorly regulated, and integrity can only be measured by how long the company has continuously been operating.
My communication experience with Capt. Green was excellent through all stages of interaction - initial advice, configuration verification, installation and then post installation. Post install there was a problem (which was not Capt Green related), but they took ownership and responded by sending back out the same engineer who had led the installation.
In what is a minefield consumer experience (choosing which solar installer, and what brand and configuration of product) my wife and are extremely happy we ran with Capt Green.