Tendril is purchasing Recurve, an energy audit and retrofit company, to integrate its software into the Tendril platform.

Recurve has gone through a few retrofits of its own during its eight-year history. Last year, the company shifted its construction group to Advanced Home Energy, a retrofitter in the East Bay area of California.

At that time, Recurve focused solely on software development. The downturn in construction and lack of capital for improvements coupled with politically hog-tied PACE programs to make the business of home retrofits tough in the past few years.