A short history of solar in Australia

The research decades

Australia's solar story starts in the laboratory, and improbably, we were world-beaters at it. From the 1980s, Australian university research - most famously at UNSW - repeatedly set world records for silicon cell efficiency, and the PERC cell architecture developed there went on to dominate global panel manufacturing. A large share of the panels on the world's roofs today trace their core technology to Australian research.

For decades that was the paradox: world-leading science, negligible local deployment. Solar was for calculators, satellites and off-grid homesteads.

The subsidy ignition: 2008-2012

Deployment ignited when generous incentives collided with plummeting panel prices. Federal certificate schemes (the ancestor of today's STCs, at one point paying a multiple of the standard rate) stacked with state feed-in tariffs that paid households handsomely - in some states far above the retail power price - for every exported kilowatt-hour.

The result was a gold rush: installations grew from tens of thousands to millions of roofs. It was messy - boom-bus t installer economics, quality problems that later regulation had to clean up, and premium tariffs that closed to new entrants once budgets blew out - but it built an industry, an installer workforce, and public familiarity nothing else could have.

The self-consumption era

As premium tariffs expired and feed-in rates fell toward wholesale reality, the logic inverted: from 'export everything' to 'use your own'. System sizes grew, prices kept falling, and solar stopped being an environmental statement and became the mainstream financial decision it is now.

Today roughly one in three Australian houses has solar - the highest rooftop penetration in the world - and on mild spring days rooftop solar alone has at times supplied the majority of some states' entire electricity demand. South Australia has run on levels of solar penetration the rest of the world studies.

Why history now points at storage

Success created the next problem: everyone generates at once. Midday wholesale prices collapse - sometimes negative - while evening peaks remain, a daily pattern that strains grids and crushes feed-in tariffs. Networks responded with export limits and, increasingly, dynamic control; policy responded with battery incentives; the market responded with VPPs.

In other words, the entire current landscape - low feed-in rates, the federal battery rebate, flexible exports - is the direct consequence of solar's own success. Understanding the history is understanding why a well-designed system in 2026 is a solar-plus-storage question, not a panels question.