More than two million Australian households have rooftop solar. While it produces cheap renewable energy, sceptics have long argued it puts extra stress on the electricity grid by increasing the voltage on nearby powerlines. A new study has debunked that theory. For more from ABC News, click here: https://ab.co/2kxYCZY You can watch more ABC News content on iview: https://ab.co/2OB7Mk1 Subscribe to us on YouTube: http://ab.co/1svxLVE Go deeper on our ABC News In-depth channel: https://ab.co/2lNeBn2 You can also like us on Facebook: http://facebook.com/abcnews.au Or follow us on Instagram: http://instagram.com/abcnews_au Or even on Twitter: http://twitter.com/abcnews