The Department for Energy and Climate Change says it has "needed to drive through reforms to secure investment in new generation to keep the lights on in the years and decades ahead" after suggestions it may have cost consumers by awarding eight renewables contracts too early.
A spokesperson said the National Audit Office's report recognises that the early deals were "designed to offer better value to bill-payers" by reassuring investors.
"Without that investment, projects would have been unable to go ahead or been significantly delayed - putting our future energy security at risk."
More top news
President Trump is being bombarded with criticism condemning the family-separation situation as a national moment of shame.
Gerald Grosvenor led the initiative for the Defence National Rehabilitation Centre and gave £70 million of his own money.
The mother-of-two said she was told by RSPCA investigators they were looking at the possibility that poison-laced sausages were involved.