The Cummins ISLe engine was retained, with choices of ZF EcoLife and Voith DIWA gearbox.

[6][7] The first production batch Alexander Dennis Enviro500EV was delivered to Kowloon Motor Bus of Hong Kong as part of an order for ten of the type in April 2023.

107 of these were for the 12 metre version, including 66 fitted with airport coach specifications (8000-8065) while the rest were standard passenger buses (8321-8360).

Citybus ordered a further 104 new generation Enviro500s which were all the 12-metre (39 ft 4+1⁄2 in) version and possess a high seating capacity for 90 passengers, 8361 to 8399 and 8402 to 8466.

Due to a surplus in Long Win's fleet, 16 of the first batch of buses have been transferred to KMB in 2020.

A mock-up of restyled 13-metre long (42 ft 7+3⁄4 in) Enviro500 MMC concept bus with 3 doors and 2 staircases was also built for the Land Transport Authority.

[14] On 25 April 2019, the Land Transport Authority announced[15] that they had awarded the tender to Alexander Dennis (Singapore) Services Pte.

Ltd to procure 50 units of three-door Enviro500 MMCs after successful trials of a different 3-door concept bus (made by MAN, then registered as SG5999Z, and given to Tower Transit initially).

Like the similar ones to identical used on Hong Kong franchised bus companies specifications Alexander Dennis Enviro500s.

[citation needed] Production of these models has taken place since September 2014 in a newly opened facility originally owned by Ameritrans Bus, Inc. in Nappanee, Indiana.

[26] By December 2016, Alexander Dennis took over all manufacturing operations within the facility and added a second body assembly line to increase production.

[34] The Enviro500s were first introduced on commuter routes between Snohomish County and Seattle, and later expanded service to Bellevue.

[35] Kitsap Transit has ordered 11 Enviro500 'USA Standard' coaches to provide higher-capacity on its busiest ferry feeder services after demonstrations in 2013[36] and 2015.

[42] Foothill Transit ordered 2 Enviro500EV variants with an all-electric drivetrain supplied by Proterra, expected to enter service in 2019.

[44] In 2015, GO Transit, Canada's largest operator of double-deckers with over 120 vehicles in its fleet, became the launch customer for the Super-Lo variant of the Enviro500s.

The chassis for these vehicles are being manufactured at a purpose-built factory in Vaughan, north of Toronto, creating up to 30 new full-time jobs.

OC Transpo ordered 43 new Enviro500 MMC "Go Anywhere" models for delivery starting in late 2015 with the last entering service September 2016.

[46] Coast Mountain Bus Company (TransLink) ordered 32 units for 2019/2020 for use on their suburban routes, followed by another 25 buses for 2021.

[47] Metrobús of Mexico City ordered 90 Enviro500 MMCs after evaluating one original version Enviro500 demonstrator in late 2014.

[49] In October 2015 Berliner Verkehrsbetriebe (BVG), the public transport operator of Germany's capital, commenced a six-week trial of an Alexander Dennis Enviro500, as part of a bigger testing programme for a new series of buses for the city.

[54] In September 2015, Alexander Dennis announced the order of 19 Enviro500s with twin staircases and three doors for PostAuto, Switzerland, delivery started in 2017.