The project - which will include traditional solar panels, as well as thermal solar panels used to heat water - is expected to generate roughly 130,000 kilowatt hours a year, or enough to power between 17 and 26 average Massachusetts homes, a company spokeswoman said.
And the panels will save the Massachusetts Mutual Life Insurance Co. an estimated $100,000 annually in energy costs.
"MassMutual is firmly committed to improving our facilities to be as green and sustianable as possible," chief executive Roger Crandall said in an announcement from the firm.
Construction is expected to begin this month and be finished by late summer. Once installed, the solar panels will occupy a 40,000 square foot parcel on MassMutual's 9.6 acres of roof.
A rendering shows what the roof will look like. The rendering was provided by MassMutual.