Hi Helman,
You have selected to install the exact same system I had installed in January this year. I am very happy with the system. 20x LG NeON 2 350W + Enphase IQ7, I paid $10,400 for my system that is after the Govt Rebate. I use approx 22kw per day, and the system is producing on average 31kw per day, this is increasing as we are starting to get more daylight. I live in Western Sydney and I have 14 panels facing north and 6 panels west. My electricity Bill this quarter is in credit.
Good luck with the system definitely worth the investment.
Adel
Sorry just realised I have 20 x LG Solar LG335W Panels 20 x Enphase IQ7+ Micro