Four state attorneys-general, including North Carolina's Josh Stein, are investigating complaints against solar installation company based in Mooresville.
Pink Energy has shut down and laid off more than 500 workers.
In a video statement, CEO Jayson Waller blamed the company's failure on Generac, which makes solar panels for homes and businesses.
"It is time for Generac to finally accept responsibility for this and make things right for its customers and business partners. I demand you do a recall now," he said.
Generac has told multiple media outlets the problem is with how Pink Energy installed its products.
An investigation by WBTV Charlotte and WECT Wilmington uncovered numerous lawsuits and consumer complaints over shoddy and incomplete work.
A union that represents Pink Energy employees in Michigan is seeking more than a million dollars in back wages due to the company's closure.