The last figures I saw re sunshine and solar panels was Qld and 6 hrs at max out put and 3 hours at about 50% output with the figures slowly diminishing as age and scum (on the panels) gradually cuts in
This is when the panels are mounted in their optimum location which the majority are not
One of my neighbors who has huge gum trees all over his suburban block has his panels on the east side of his **le roof
I was never game to ask him how effective they were
