We Have a 5kW system installed on the shed roof (20 x 250W panels) unfortunately facing East so output drops after 5 pm. O Ever the last 3+ years since installation have averaged 19.13 kW daily. Synergy bill us every 2 months and we get a VERY GENEROUS 8.3 cents per kW fed into the grid against being charged about 28 cents for the supply.
Spring is coming and today we generated 19.18 kW, the other day when lovely rain was bucketing down we only got 2.3 kW
In summer we use the air conditioners mostly during the day to use solar power when we generate 30+ kWh daily but only feed about 12 into the grid saving about 18 x 28c + $1 credit
It is a worthwhile investment. ROI varies between 12 and 26% for each 2 month billing period, tax free, and the capital cost should be repaid in about 2 years.
Location 32d 11' 27.63" S : 116d 00' 53.12" E lucky neighbour's system faces North and he gets a bit more power than us.
Alan