EnBW made a binding offer to Prokon's insolvency administrators, which has been accepted as the preferred bid.
According to EnBW, it made a "mid three-digit million euro" bid for Prokon, expected to be paid in one lump sum. A decision is expected in summer 2015.
In January 2014, Prokon filed for insolvency following the withdrawal of capital by a number of investors.
Prokon has a project portfolio of 537MW in Germany and Poland, and even developed its own 3MW turbine in 2013. It is planning a further 4.2GW of wind projects in Germany, Poland and Finland.
EnBW CEO Frank Mastiaux said any takeover would result in Prokon's "core business" continuing. "It will be possible to create a new, extremely competitive supplier in the European wind energy market," he said.
In 2013, EnBW unveiled a "2020 strategy" to invest €3.5 billion in renewable energy and expand the portfolio to 40% of its business, up from 12%.