Thousands of people who bought solar panels have complained to a financial watchdog that they are not bringing them the returns they were promised.
Many people took out loans to pay for panels on the promise they would save thousands of pounds in electricity costs and make money generating power.
They say they have not had the expected savings, and the Financial Services Ombudsman has had 2,000 complaints.
Barclays Bank has put aside £38m to deal with potential claims.
