Useful references:

1. Research Institute of Sustainable Energy at:
   www.rise.org.au/info/Tech/index.html
2. Sustainable Energy Development Office at:
   www1.sedo.energy.wa.gov.au
3. Australian Government Office of the Renewable
   Energy Regulator at:
   www.orer.gov.au
4. Solahart website at:
   www.solahart.com.au