Including Bala's breakaway goal against Union, Harvard is two for its last 20 on the power play.
"The power play is just not clicking right now," freshman defenseman Aaron Kim said. "We needed it to get us some goals."
Engineer winger Doug Shepherd tallied an empty net goal at 19:32 to make the game 3-1.
Kim scored his first career goal on a blast from the right point with 10 seconds remaining in the game to produce the final score.
Notes
RPI Coach Dan Fridgen won his 100th game Friday night.
Spotted in the stands were former Philadelphia Flyers goalie Ron Hextall, now scouting for them along with former Philly Coach Paul Holmgren.