How generous subsidies helped Australia to become leader in solar power

Households have continued to use state help that was first created more than a decade ago

For a brief period over several weekends this spring, the state of South Australia, which has a population of 1.8 million, did something no other place of a similar size can claim: generate enough energy from solar panels on the roofs of houses to meet virtually all its electricity needs.

This is a new phenomenon, but it has been coming for a while - since solar photovoltaic cells started to be installed at a rapid pace across Australia in the early 2010s. Roughly one in three Australian households, more than 3.6m homes, now generate electricity domestically. In South Australia, the most advanced state for rooftop solar, the proportion is nearly 50%.