Biddeford’s Pepperell Mill Campus, a sprawling former mill complex that includes residential units, plans to install the largest privately-held solar energy project in Maine, according to a news advisory.

The large-scale solar array will produce enough electricity to more than meet the needs of the campus’s residential units, according to an announcement from U.S. Sen. Angus King’s office. King, a Maine independent, will be in Biddeford on Friday to tour the campus and formally unveil the project.

ReVision Energy is contracting to do the work for the Pepperell Mill Campus.

It was not known Thursday how many panels will be installed, when or at what cost.

Pepperell Mill Campus officials declined to provide details of the project before Friday’s announcement.