Thousands of customers have been mis-sold loans that covered the cost of putting solar panels on their roofs.Homeowners signed up on the understanding that the panels would 'pay for themselves'.But borrowers later found that their loan repayments outstripped any savings made on their electricity bills. Around 2,000 people have complained to the Financial Ombudsman Service in the last year alone. It is estimated that the number of people affected by the scandal could be as high as 20,000.

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