In 2019, Edmonton received funding to purchase 50 Proterra ZX5 40' E2 MAX electric buses, but this has since been reduced to 40 electric buses – one of the largest purchases of electric buses in Canadian history. The first 21 buses started service in August 2020, with the second batch of 19 buses being scheduled to arrive in the fall of 2020. The buses are charged from overhead charging units to save floor space in the bus garages, and it is the first transit service in North America to use such infrastructure for its buses. ETS conducted winter-testing of this bus model in 2015, and found that these buses could handle most of their routes. The buses will be housed at the Centennial Garage and the Kathleen Andrews transit garage; the latter will be the main hub for Edmonton's electric buses once it is fully operational.