To reduce greenhouse gas emissions in Australia, renewable energy is crucial. Current government policies may not significantly increase renewable electricity generation until 2020. Solar technologies will have limited impact before 2020. Australia's renewable electricity future depends on the success of Mandatory Renewable Energy Target and expanded Renewable Energy Target. Without policy changes, Australia may not reach its 20% renewable electricity target by 2020 or build up solar and geothermal capacity for significant contributions after 2020.