The good news is the Renewable Energy Target has been a success. It's built up a wind and solar power generation industry at a very low cost to electricity users. In six years' time it'll start to push power prices down. The bad news is the panel doesn't like it.

It thinks it's been too successful.

Originally intended to snare 20 per cent of Australia's electricity generation industry by the end of the decade, it's on track to grab 28 per cent, all the while having an impact on prices the panel says "appears to be small".