Tenants at the Port of San Diego received a $5.9 million state grant to help them roll out all-electric freight vehicles — such as big-rig tractors and forklifts — meant to take the place of diesel-powered vehicles.

On top of that, seven port tenants will make $2.3 million in cash and in-kind contributions, bringing the value of the deal to $8.2 million.

A Poway business, TransPower, is among the companies that will benefit from the new effort. TransPower builds electric propulsion systems and energy storage systems for heavy vehicles, including freight vehicles and school buses.

The port’s tenant association announced the grant from the California Energy Commission on July 18.

The seven port tenants making contributions are Cemex, Continental Maritime, Dole Food Co., Harborside Refrigerated Services and Cold Storage, Marine Group Boatworks, Pasha Group and TerminaLift.

San Diego Gas & Electric Co., the Grant Farm and the port district also participated in the process of getting the grant.

In addition to TransPower, the industrial vendors developing and building the all-electric freight vehicles are BYD and Efficient Drivetrains Inc., also known as EDI. The technology subcontractors are Peloton, GC Green, Greenlining Institute and carbonBLU.