For payback time, I see that no study looks at concentrated solar PV (as used for the Victoria project) energy cost. The PV cell itself is very small (but likely more hazardous components) the rest is mirror and tubes.
Two other papers on the topic:
* http://socrates.berkeley.edu/~kammen/C226/8r.pdf transporation can account of up to 19% of installation energy cost, so on site or near site production of component should matter (as market expands production site should pop up in more places).
* http://www.concentrixsolar.de/cms/upload/pdf/SCC_3_Lerchenmueller_2005_04_27_Paper.pdf they conclude that 1.5 euros per watt-peak is within reach in case of mass production, assuming 20% load and fx=1.36 that gives 10.20 USD per installed efficient watt, not far from the data I computed.
* http://socrates.berkeley.edu/~kammen/C226/10r.pdf cost per kwh estimates for various solar projects
* http://www.greenhouse.gov.au/renewable/recp/pubs/booklet.pdf energy in Australia
