Rooftop solar in Australia is ~60cents per Watt installed.
in the US - admittedly 4 years old info, the cost of utility scale solar was like ~$1/watt - rooftop solar was like $2.5-$3/watt
alt Hacker News
in the US - admittedly 4 years old info, the cost of utility scale solar was like ~$1/watt - rooftop solar was like $2.5-$3/watt