The CSIRO, in its GenCost report, has determined that an electricity grid carrying 90 per cent renewables would deliver much cheaper electricity to households compared with fossil fuels and nuclear.
This is even taking into account expenditure of $30 billion for new transmission lines and projects to provide back-up power when the wind isn't blowing and the sun isn't shining, such as the $12 billion Snowy 2.0 pumped hydro dam. The comparison figures are compelling.
