TheBYD B series are a line ofbattery electric buses produced by Chinese vehicle manufacturerBYD. It is the first bus model powered by BYD's Lithium Iron Phosphate Blade electric-batteries. It is available as a 10-metre single-deck (B10), a 11-metre double-deck bus (BD11), a 12-metre single-deck (B12), a 12-metre tri-axle double-deck (B12D), a 15-metre tri-axle single-deck (B15) and a 18-metre articulated bus (B18).[1][2][3]
The BYD B series was launched on 29 July 2020, superseding the highly popularBYD K series. The bodywork was designed byWolfgang Egger.[4] According to BYD, the new bus models feature LED water lamps, USB charging ports, newer-generation wheel hub motors which are 6% more energy-efficient, as well as a lightweight aluminum frame reducing the body weight by up to 10%.[1]
A BYD B12A03 Single-deck Bus, also featuring three doors, was showcased at the Singapore International Transport Congress & Exhibition 2022.[23][24][25] After the exhibition ended, the bus was modified, repainted lush green livery and entered service underSBS Transit on 14 January 2024. It was registered as SG4013A. The bus is deployed on bus routes 70, 138*, 162 and 265. * The bus was not approved on 138 by LTA due to the third door not being able to fit in the bus stop. It was trial ended from February 2025 and returned to BYD Auto.[26]
On 25 November 2023, theLand Transport Authority (LTA) announced that it had awarded a contract to BYD to purchase 240 BYD GTK6127BEVB (BC12A04) buses, with an option for 60 more exercised on 23 October 2024. They had entered revenue service on 2 December 2024,[27] initially deployed bySBS Transit on bus routes 86, 107/107M and 159. Over the next few months, the buses were gradually deployed on more bus routes such as 51, 80, 112, 113, 115, 116, 117, 151, 153, 163, 165, 325, 371, 372 and 374.
A new BYD GTK6127BEVS (marketed as B12DS) electric double-deck 3-door 2-staircase bus made its debut in Singapore International Transport Congress & Exhibition (SITCE) 2024. This BYD GTK6127BEVS bus was specially designed for the Singapore market, with bodywork by Zhuhai Guangtong Vehicle Manufacture. It may be accepted as a trial bus by theLand Transport Authority, due to its vision of having half of the public bus fleet to be electric by 2030, and its recent preference for double-deck buses to have the 3D2S configuration.
On 28 July 2025, A new batch of 14 BYD GTK6127BEVB (BC12A04) buses has been delivered inorange livery with the same interior layout. these will be operated byTower Transit Singapore on behalf ofSentosa. These electric buses will be replacing existing diesel buses as part of a 5-year operating contract.[28]
United Kingdom: BYD BD11s entered service forTransport for London (TfL) in December 2024.[30][31] Additionally, B12 single-deck electric buses have also been made to TfL specification and are due to enter service.[32]
Chile: 10 B12D double deckers entered service in mid-2023 on Route 520.[33] Transantiago ordered a demonstrator B18C01 articulated bus which entered service on Route 516 that same year.
^"Company Profile – BYD SINGAPORE". Retrieved2022-12-10.10 units of B12-A03 single-deck (3-door) bus was sold to Comfortdelgro Bus for NTU & NUS university shuttle bus operations.
^"SITCE 2022".www.sitce.org. Retrieved2022-12-10.In this SITCE showcase, BYD will be showcasing an exciting new range of electric vehicles ranging from a prime mover, commercial bus and a passenger car.
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