Renewable energy in South Australia
South Australia's renewable energy infrastructure and capacity has grown due the completion of many wind projects and a gross feed in tariff: "Electricity (Feed-In Scheme-Solar Systems) Amendment Bill 2008", which lasts until June 2028. Normal tariff for electricity: $0.22 / kWh Feed-in tariff: $0.44 / kWh.
Result
Thousands of South Australian homes will have solar systems installed. Some businesses will turn their roofs into mini-renewable power stations. South Australia's renewable energy industry is growing and the State Premier Mike Rann's initiatives are promoting it. He wants the government to be carbon neutral by the year 2020.[1]
It is not clear whether there is a provision for the feed-in tariff to increase with natural increases to the price of electricity, at a multiple of two. This was the original intent, but may have got negotiated out. The 44 cent tariff is only paid for any electricity exported, so only when the system output exceeds domestic demand.
Rebates
The South Australian government does not offer any additional rebates or incentives to domestic customers. It is a solar schools program.
Estimated payback
Payback will be best for systems of largest eligible size, where the domestic demand is smallest, or mainly occurs at night and low power consumption during the day and houses without air-conditioning.