Since that lightbulb moment in the hot and dusty school carpark a couple of years ago, Radian Energy and its founders have come a long way.

The climate-friendly electricity generated by solar panels in the past 40 years has all but cancelled out the polluting energy used to produce them, a study said Tuesday.

Fossil fuels are hundreds of millions of years old, but in the last 200 years consumption has increased rapidly, leaving fossil fuel reserves depleted and climate change seriously impacted.

There are now over 2.15 million solar rooftops in Australia, and the figure is poised to grow significantly over the next five years.

We formed Radian after seeing how much households, businesses, and schools across Australia were paying for their power.