TriMet will debut its mini-fleet of battery electric buses in Beaverton beginning in the fall of 2018, the agency said Wednesday.

Five 40-foot battery-electric buses will run on the 62-Murray Blvd line, a 13-mile route between the Sunset Transit Center and Washington Square Transit Center.

TriMet announced a year ago that it had received a $3.4 million federal grant to purchase four electric buses. The number was upped to five when Portland General Electric included up to $800,000 for charging…