Thirty-two of the victims were from Leicestershire.
A fraudster who conned elderly and vulnerable residents has been sentenced to seven years imprisonment and banned from company directorship for 10 years.
Robin MacDonald, aged 45, of Park Row, Bretby, Burton-on-Trent, was found guilty of conspiracy to commit fraud by false representation, along with charges of fraudulent trading.
Thirty-two of the victims were from Leicestershire, and between them, they lost more than £285,000 to the fraud.
Between 2014 and 2015, MacDonald repeatedly mis-sold products including solar panels and emergency medical buttons through his businesses Sunpower Renewables Ltd and Stirling Technologies Ltd, trading as Proshield Alarms.
Roy Hancher, 54, of Light Ash Lane, Coven, Wolverhampton, pleaded guilty to fraudulent trading and Nicola Mather, 44, of Spindletree Drive, Derby, pleaded guilty to money laundering prior to the trial.
Louise Boyall, Leicestershire County Council Trading Standards, said: "Leicestershire Trading Standards welcomes the successful prosecution led by the National Trading Standards Regional Investigations team. Following an exhaustive investigation involving Trading Standards Officers from across the East Midlands authorities, this investigation concluded in a prosecution which will prevent many more vulnerable people falling victim to these fraudulent companies and their promoters.
"This was a complex investigation and involved many witnesses, without whose evidence, the convictions would not have been possible.
"The scale and diligence of the investigation reflects Trading Standards’ continued commitment to tackling rogue traders affecting our residents, and the sentencing imposed properly reflects the seriousness with which the courts will treat such offending."
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