Consumers who install microgeneration technology such as wind turbines and solar panels on their properties should not expect a perfect feed-in tariff to be introduced in April 2010.
John Moriarty, from the Department of Energy and Climate Change (DECC), said that the new tariff will have problems when it is implemented and the government will have to keep it under constant review.
Speaking at the International Small Wind Conference in Watford, hosted by the British Wind Energy Association, he said: "Without being defeatist, there will inevitably be problems within the feed-in tariff in the UK."
"We'll need to review it and we'll need to make changes on an ongoing basis. Please don't expect our feed-in tariffs to be perfect from the start," he added.
The proposed feed-in tariff was announced during chancellor Alistair Darling's Budget speech, as part of a package of new renewable energy considerations, in the House of Commons on Wednesday.
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