BaronVonRorts information must be a lie because it it was true nobody would ever have purchased a rooftop solar system.
If governments were offer such subsidies as $0.40 per kWh people would be climbing over each other to get the subsidy.
Following information from Europe on payback time 0.5-1.5 year for Solar system in Southern Europe. It must be even better in Australia because of the climate.
2MW wind turbine net benefit in less than 1 year.
http://cleantechnica.com/2013/12/26/solar-energy-payback-time-charts/ Quote:So, as you can see, even with the technology of today, the energy payback of solar power is between ½ a year and 1½ years in Southern Europe and under 3 years in the rest of Europe (which has approximately the solar irradiance levels of Alaska). That’s quite a long time before the lifetime of solar panels, which have been shown to work to factory specs for over 30 years… and counting.
http://www.sciencedaily.com/releases/2014/06/140616093317.htm Quote:US researchers have carried out an environmental lifecycle assessment of 2-megawatt wind turbines mooted for a large wind farm in the US Pacific Northwest. Writing in the International Journal of Sustainable Manufacturing, they conclude that in terms of cumulative energy payback, or the time to produce the amount of energy required of production and installation, a wind turbine with a working life of 20 years will offer a net benefit within five to eight months of being brought online.