The report states that the Scottish taxpayer would have to foot the bill of supporting small-scale Scottish renewables, adding £38 (EUR 46) a year to bills.
It added: "If the full costs of supporting large-scale Scottish renewables fell to Scottish bill payers, the total potential increase would rise considerably – up to £189 (EUR 229) for households and £608,000 (EUR 737,926) for a medium-sized manufacturer in 2020."
The paper issued by Decc also revealed that Scottish renewable power accounts for 10% of electricity sales in the UK, despite receiving 28% of the money spent by UK consumers on renewable energy projects — approximately £560 million (EUR 680 million).
Earlier this week, Scottish energy minister Fergus Ewing said Scotland should retain a "far greater degree of oversight" in the UK's energy policy, even if the country gains its independence.
The Decc paper goes on to say that of all the green energy used in other parts of the UK only 4.59% is produced in Scotland.
Decc concluded with this warning to Alex Salmond and the "Yes" campaign: "With a range of generation sources within its own borders and elsewhere, a continuing UK would not be obliged to purchase energy from an independent Scottish state."
Speaking in Edinburgh on Tuesday (8 April), energy secretary Ed Davey said: "The Scottish would see their energy bills rocket if they have to pay for Scottish renewables alone.
"The likely result would be an independent Scotland investing less in renewables, which would be bad for jobs, bad for clean-energy industries and bad for the world's climate."