'Free' solar panels may cost a fortune

Simon Burt/PA Wire/Press Association Images

There are mounting concerns over solar panels which have been installed for 'free' and could make the property hard to sell and impossible to remortgage. The Royal Institution of Chartered Surveyors alerted homeowners about this back in October, and as the mortgage market has continued to tighten, they are renewing their warnings.

So what's the problem?