Critics are also likely to ask questions over the BBC's willingness to use an incomplete report as the basis for one of its flagship current affairs programmes.
"The fact that this report isn't being published also shows the BBC was wrong to use it in their Panorama programme in November, which painted an inaccurate picture of the impact of wind energy on current household bills," said the spokesman for RenewableUK.
"We will be seeking further clarification from the BBC's Panorama programme about exactly why they felt this report was worth using as a major part of their arguments against clean energy."
The news will also provide a boost to incoming energy and climate change secretary Ed Davey, who has already been forced to defend the government's wind energy policies from a group of around 100 Conservative MPs who last week wrote to David Cameron complaining that support for wind farms is proving too costly.
The news comes just days ahead of the broadcast of an ITN Tonight programme on the cost of green policies, due to air on Thursday 9 February, which has sparked fears among green groups that flagship renewable energy policies will again come under attack.
Keith Allott, head of climate change, WWF-UK, said KPMG's decision provided further evidence that the cost of renewables was becoming an increasingly emotive issue.
"The whole issue of energy bills and renewable energy has been whipped up into a media storm over recent months, with scant regard to the real evidence base," he said.
"The Daily Mail has run three corrections to lead articles which tried, erroneously, to blame green policies for the increase in consumer bills. KPMG's report led to a Sunday Times article and informed a very skewed BBC documentary on renewables, but now it seems that it may never see the light of day. We urgently need to inject some integrity and honesty back into this debate."
In related news, the BBC posted a clarification notice on its website last week about the controversial Panorama programme.
"While the film focused on government energy policy going forward – and the associated costs – we feel it worth repeating that the rise in current energy bills is predominantly linked to the increase in winter gas prices," said the BBC in a statement.
It added that it would have been "helpful" if this point had been made more clear to the audience.
Dale Vince, founder of green energy company Ecotricity, urged KPMG to publish the report in order to show it is a transparent organisation.
"KPMG should just come clean and admit so, rather than try and spin this line," he said. "They got it wrong, it happens, we all know that even Big Four accountancy firms make mistakes."
This story originally appeared on BusinessGreen.
Reports photo via Shutterstock.