Only a fifth of Australia's available roof space is fitted with solar panels, a report has found. Photo: Darren England/AAP PHOTOS

Australia is missing out on harnessing solar power from industrial and commercial properties which could boost energy for the grid while driving down bills.

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However, installing solar panels on businesses is a job that's either too big to too small for companies to cash in on rebates, so many choose to go without, according to a report from Next Advisory released on Tuesday.

It adds to growing pressure on government and other authorities to do more to ha

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