Froth Goth said..
Just watch will prowse on youtube or backyard solar (some old fella in aus) then try buy panels from ebay that they talk about
I bought my system from an ebay auction 12 years ago and got it at about 60% of the price the same would have cost retail including installation.
The inverter failed about 6 months before the warranty ended, and the ebay vender was impossible to find. I got in touch with the installer and he told me that there was a known issue with the particular model, so I tracked down the importer and they honoured the warranty promptly. No problems since.