This just in from the Telegraph:

Peter Atherton, Citigroup’s head of utilities research, said the SNP’s radical renewable power targets require up to £7 billion of investment a year but the figure at the moment is only £750 million.

The industry expert, who advises the bank's clients where to invest their money, said utility share prices are “dire” and green energy manufacturers have proved a “terrible, catastrophic investment” in recent years.

It is “borderline fantasy” that this difference can be made good because banks and international investors do not think green energy schemes provide reliable returns, he said.