FedEx Corp. (NYSE: FDX) announced on Tuesday that it will acquire 1,000 Change V8100 electric delivery vehicles to expand its fleet. FedEx will acquire 100 of the vehicles from Chanje Energy and lease 900 from Ryder Systems.

FedEx says it will intend to use the vehicles for its FedEx Express commercial and residential services. The vehicles will be used to pick-up and delivery packages within the U.S. All the vehicles will operate out of California.

The electric vehicles can travel more than 150 miles when fully charged and have the potential to save up to two thousand gallons of fuel while avoiding 20 tons of emissions per vehicle annually. Each vehicle can hold up 6,000 pounds in cargo.

FedEx has already been using electric vehicles as part of its pick-up and delivery fleet since 2009 to cut down on emission levels.

“FedEx continually seeks new ways to maximize operational efficiency, minimize impacts and find innovative solutions through the company’s Reduce, Replace, Revolutionize approach to sustainability,” said Mitch Jackson, FedEx Chief Sustainability Officer.  “Our investment in these vehicles is part of our commitment to that approach of serving our customers and connecting the world responsibly and resourcefully.”

Other mail service providers such as United Parcel Service (NYSE: UPS) and DHL have faced scrutiny from regulators to cut down on emission levels due to environmental concerns, according to Reuters.

UPS, DHL and FedEx have all already placed orders for Tesla’s (NASDAQ: TSLA) electric semi truck and use Workhorse’s (NASDAQ: WKHS) electric vans.