Receivers KPMG were called in to the Ayrshire manufacturer last month after a fault found in one of its turbines caused a financial crisis.
Proven Energy went into administration with the loss of 55 jobs after a defect was identified in its P35-2 model.
KPMG said the Kingspan sale has safeguarded the jobs of 20 remaining Proven Energy staff and allowed manufacturing to continue at the company’s Stewarton plant.
Joint receiver Blair Nimmo said: “We would like to thank Proven’s remaining employees, customers and suppliers for their patience and support and would also like to thank the many parties who showed an interest during the sales process.”
Noel Crowe, from Kingspan, said: “Kingspan Renewables intends to launch 6KW and 3KW turbines, incorporating the high performance, reliability and key features of the Proven P11 and P7 models, and will manufacture these products in Stewarton.
“A decision on whether or not to launch a 15KW turbine will be made at a later date, but any launch is unlikely to be before January 2013.”