> Remind me
Why, is your internet down?
> what's the population density australia ?
Very much the wrong question for several reasons:
* Australia's population is seriously urban, to the point of ridicule by Jack Davis[1] who referred to the european descedents as "fringedwellers" for their habit of clinging to the fringes of the continent in a few very large cities - you'd be wanting to look to the population density figures for Sydney / Melbourne to get a sense of how the majority of Australians live
* More importantly the energy demands of Australia, the country, are quite different to the energy demands of the Australian people - as a bulk exporter of raw materials the bulk of energy used in Australia goes towards goods used by an very large number of others in the world poplation. By way of example, W.Australia a single state with a population of 2 million exports 16x more iron ore every year than than the USofA ever achieved in a single year - this goes towards a being a major percentage of the global demand for steel.
* You're looking more for the kind of figure that relates to the energy demands for the size of the market served and less to the energy demands of the few individuals that happen to live nearby.
> And how much sunlight do they get ?
This is, of course, irrelevant for the question of the example I gave, Adelaide in South Australia. They do not use the total sunlight that falls on the total area of the country of Australia. That project uses the sunlight that falls just outside a city on the 35th parallel south which gets the same amount of sunlight as a city on the 35th parallel north.
[1] https://en.wikipedia.org/wiki/Jack_Davis_(playwright)