After a month of research and debate, they reached an agreement with Brightergy.
They agreed to a five-year contract with options to renew.
The panels themselves, have a 20-year warranty.
District leaders say they could save a total of nearly $3.45 million.
St. Joseph's superintendent says adding the panels is part of the district going green.
"Our first focus is always the kids, how this can benefit them. Then, we want to look at our patrons, how we can be accountable to our tax payers, and this saves them and their dollars and our usage of those. In protecting those, we want to have transparency and accountability in our tax payers, and this helps in that," said Dr. Fred Czerwonka.
The solar panels must be installed by June 30.