BYD K9

The BYD K9 is a Chinese battery-electric city bus built by BYD Company, introduced around 2010 as one of the first pure electric buses produced and deployed at meaningful scale rather than as a small demonstration fleet. Built around BYD's own lithium iron phosphate battery packs and electric drivetrain, drawing on the company's existing expertise as a battery and electronics manufacturer before it expanded into vehicles, the K9 became the workhorse of the city of Shenzhen's transition to an all-electric public bus fleet, a transition Shenzhen completed in 2017, making it the first major city in the world to electrify its entire municipal bus network. The K9's success helped establish BYD as a leading global exporter of electric buses to cities across Europe, Latin America and elsewhere seeking to reduce urban transit emissions.