Attached below are some solar resource maps. This information is taken from the Bureau of Meteorology website. Interested readers are advised to check there.
Below is the monthly average day solar insolation for Brewarrina for 1990 to 2014.
Below is the daily solar insolation for Brewarrina for the 2011 calendar year.
Below are summaries of sunshine data from 15 sites across inland NSW. There is daily sunshine data for the 2013 calendar year, a graph of this data; and monthly sunshine data from 1990 to 2014.