One of the state’s largest solar contractors is reportedly shutting its doors, but it was unclear on Friday whether the shutdown was temporary or permanent or why it was happening.

Broadway Electrical Co. of Boston, which does electrical construction work and in recent years has moved aggressively into solar power development, stopped doing work at some of its projects yesterday, leaving customers in the lurch.

Liz Argo, the special projects coordinator for the Cape and Vineyard Electric Cooperative, which has hired Broadway to do several solar installations on the Cape, said Broadway workers didn’t show up at work sites on Friday. She said she had little information from the company on what was happening although Broadway officials promised to meet with her next week.

“We have heard that they are winding down. We’re in a heightened state of concern,” she said.

Jonathan Wienslaw, president of Broadway Electrical, couldn’t be reached for comment. Another official at Broadway declined comment, saying all information must come from Wienslaw.

Last May, Gov. Deval Patrick called for a dramatic boost in the state’s solar power production during a press conference at a rooftop solar facility in South Boston installed by Broadway. Patrick and other state officials were joined at the announcement by Wienslaw.