The number of government grants made to people who want to fit solar panels or other green energy systems to their homes has halved, the BBC has learned.
It comes after the low carbon buildings programme cut the maximum grant on offer from 7,500 to 2,500.
The Renewable Energy Association, which says the programme is failing, has accused ministers of complacency.
But the government says uptake went up considerably last month after the need for planning permission was removed.
