Scrap metal is being cashed in to help koalas in south-east Queensland.

Energex has donated more than $100,000 from recycled transformers and powerlines to help restore koala habitat corridors.

Chief executive Terry Effeney says they are working closely with SEQ Catchments on a range of environmental projects.

“We’re spending over a billion dollars a year on our capital and operating programs,” he said.

“There’s a lot of materials involved, there’s a lot of aged stuff we pull out of our system, just getting the value out of that is important for us and the fact that we can give away a proportion of that is great.”