On average, respondents with a view estimated that solar accounts for £196 per year – but in reality subsidy for solar only accounts for £9 on an average household bill of £1,300 a year.
The median estimate was £100. Many respondents said they did not know this.
A survey on wind power earlier this year found that perceptions of the cost of wind were equally high.
A spokesman for the Solar Trade Association said: “The Government has justified the cuts to solar and renewables on the basis of reducing costs on bills, but hasn’t told people that the cost of getting solar subsidy-free – a breakthrough achievement – is relatively modest.”
“This survey shows that solar is cheaper than many people think, and that the perception of the cost of solar on bills has become grossly inflated. We need to put this right.”
Last week, the UK Department of Energy (DECC) released the results of its own latest opinion poll on public attitudes to energy. The regular opinion poll found yet again that solar is the nation’s favourite source of energy at 80%, higher than every other renewable or conventional energy technology.
In addition a ComRes survey for the Energy and Climate Intelligence Unit (ECIU) also showed last week that amongst the British public support for renewables subsidies combined was at 83%, and solar in particular has 73% support.
The STA’s poll comes as the Government is due to make its final decision later this year on how much to cut Feed-in Tariff subsidies for solar. The Department of Energy and Climate Change this summer published proposals  to slash tariffs by up to 87% and set stringent caps on the maximum amount of solar that can be deployed.
The Solar Trade Association has put forward a ‘£1 emergency solar rescue plan’ which has been backed by 30 MPs from all political parties, including several Conservatives. The plan would only add an extra £1 per year on average household energy bills from 2019 for new solar deployed over the next three years which would generate enough electricity to power the equivalent of 875,000 homes.
This would allow solar to continue in the UK while giving the Government the cost control guarantees it needs.