The fund bought the stake in 2013 and the project, powered by 3.6MW Siemens turbines, was commissioned in 2015.
The divestment has resulted in a gain of almost DKK 1 billion (€135 million) in less than three years, PKA said.
The Butendiek investment has thus achieved an annual return of roughly 25% to PKA's 275,000 members.
PKA CEO Peter Damgaard Jensen revealed that normally such an infrastructure investment was for the full life of the project, typically 25 years.
But the company saw sold profit for its members and seized the opportunity.
