Welsh environmental body Natural Resources Wales has come under fire, after proposing a massive hike in the cost of new licences for hydroelectricity schemes.
The National Farmers Union says it fears the price rise from £135 to £1,500 will see farmers discouraged from producing renewable energy in the future.
Tom Sheldrick reports:
Plans for a new wind farm in the Dyfnant Forest in Powys have been dropped by ScottishPower Renewables.
The company has been working on the proposals since 2008, but says it has decided not to process further, after carrying out a detailed review.
Dr David Clubb, director of RenewableUK Cymru says support for all types of renewable energy, including onshore wind farms, is evident from today's poll, but Wales is still lagging behind other countries in the UK and Europe.
Over two thirds of people in Wales are in favour of large scale wind projects in their local area.
That's according to a YouGov survey commissioned by Renewable UK Cymru into attitudes of Welsh people towards renewable energy.
Almost two thirds (62%) of the people questioned for the annual survey said they support the development of wind power as part of a mix of renewable and conventional energy.
The survey shows that support for renewable energy outshines conventional fossil fuels.
Just 22% of people were in favour of shale gas and 31% for nuclear to provide energy in their area.
The highest support was for solar energy, with 81% of people showing support for this.
Evidence will be given to the Environment and Sustainability Committee later on a controversial method of shale gas extraction more commonly known as fracking.
Those giving evidence include the environmental lobby group Friends of the Earth Cymru, and the group applying to test drill in south Wales UK Onshore Gas Limited.
The Director of Friends of the Earth Cymru is expected to promote the focus on renewable energy over the use of fracking.
"We welcome the bill in that in gives confidence to industry to invest in renewable energy, and there's lots of jobs in that" says Alun Jones, of WWF Cymru.
"It does mean that bills will go up, maybe £60-£80 by 2020, but gas prices as prices are likely to increase by at least £175 in that time."
"It's better to get off gas, and onto renewables".
Energy Secretary Ed Davey will set out fresh proposals to slash demand for electricity as he publishes a blueprint for energy that critics warn will massively increase households bills.
The UK has a target of generating 30% of its energy from renewable sources by 2030.