In 2012 I wrote a blog entitled ‘Re-powering Port Augusta’, advocating large scale concentrating solar thermal power stations be built to replace Northern and Playford B ageing dirty brown coal fired power stations, which were due to close. Since I wrote that blog a number of coal fired power stations have closed and many parts of Australia have experienced power cuts. For many decades Australia has had excellent pioneer academic solar thermal researchers but still has no large scale solar thermal power stations with thermal storage. India, South Africa and Chile have all overtaken Australia on that front. Now, rather belatedly, there is a flurry of interest in building various types of solar power and energy storage systems in Australia, and especially in the Port Augusta region. Port Augusta in South Australia is ideally located for such projects with good grid connections, a very sunny climate and a workforce with relevant skills.
Sundrop Farms, with Aalborg CSP, have built the excellent system that I blogged about a few months ago (here and here). This however was relatively small scale and just for the tomato farm, not for feeding electricity into the grid, but does provide an excellent example of what can be done.
Australia’s adoption of solar power has been very unusual. The vast majority of its solar power, about 80%, is domestic rooftop arrays. (Solar farms only account for about 8%) Rising gas and electricity prices, recent power cuts, government policies that favoured small scale arrays, large numbers of detached owner occupied houses and falling prices of solar panels and batteries are all factors contributing to the rise in rooftop solar systems in Australia. Thirteen months ago Energy Minister Josh Frydenberg stated that 15% of Australian households had photovoltaic solar panels on their roofs. Renate Egan of the Australian Photovoltaic Institute claims this figure is now 26% (higher than any other country, except perhaps a few tiny island nations). In Baldivis, a suburb of nearly 6,000 houses to the south of Perth, the figure is 69% and rapidly increasing. Within a year or two it is likely that some such places will have solar panels on 90% or more of households.
Rooftop solar looks set to increase. So far this is mainly by adding solar panels to existing buildings, which are often not ideally suited due to their orientation and many having hipped roofs. If new houses were designed and orientated to maximize solar generation very much more power could be produced at very competitive prices. The next steps will be to increase energy storage and for people to switch to electric transportation systems. As I’ve said before, Australia could become a 100% solar powered economy. It is happening piecemeal, but could be very beneficially aided by clearer government goal setting and forward planning.