| Mellor Sigma | |
|---|---|
 Mellor Sigma 7 at the 2022 Euro Bus Expo | |
| Overview | |
| Manufacturer | Wisdom Motor Mellor Coachcraft |
| Production | 2021–2024 |
| Body and chassis | |
| Doors | 1 or 2 |
| Floor type | Low-floor |
| Chassis | Integral |
| Powertrain | |
| Engine | Dana TM4 electric motor |
| Transmission | Automatic |
| Electric range | Up to 220 miles (350 km) |
| Dimensions | |
| Length | 6.99–13.50 metres (22.9–44.3 ft) |
| Width | 2.08–2.55 metres (6 ft 10 in – 8 ft 4 in) |
| Height | 3.11–3.30 metres (10.2–10.8 ft) |
The Mellor Sigma is a battery electric single-deck bus manufactured by Wisdom Motor in China and sold in Europe by Mellor Coachcraft between 2021 and 2024.[1] It was available in various lengths, from 6.99 – 13.50 metres, with the shortest being marketed as the Mellor Sigma 7,[2] and the longest as the Mellor Sigma 13.[2]
The Sigma was created as a zero-emission single deck vehicle, marketed as improving "demand for cleaner solutions to public transport".[3] Mellor claim that there is a weight saving across all models compared to competitor vehicles, with capacities between 30 and 80 passengers depending on the vehicle size.[4]
Mellor initially launched the Sigma with the Sigma 7 and Sigma 10 models,[5] with the Sigma 7 being a single door model and the Sigma 10 being a dual door model. The Sigma 7 debuted at ITT Hub,[6] while the 9.4 metres (31 ft) Sigma 9 later debuted at Busworld Europe 2023 in Brussels. A 13.5 metres (44 ft) variant known as the Sigma 13 was also announced at the event in October 2023.[7]
As of May 2024, Mellor Coachcraft had ceased to market the Sigma bus range.[1]
- ^ a b "Mellor and Treka product offerings and sales teams come together". routeone. 23 May 2024. Retrieved 25 May 2024.
Concurrent with the product and sales team alignment has been confirmation that the Sigma battery-electric bus range no longer forms part of the Mellor range. Previously, it was built by Wisdom Motor and badged as a Mellor product.
- ^ a b "Sigma". Mellor Coachcraft. Archived from the original on 30 June 2022. Retrieved 17 September 2017.
- ^ "Mellor launches new all-electric Sigma range". Mellor Bus. 13 December 2021. Archived from the original on 14 December 2021. Retrieved 16 May 2022.
- ^ "SIGMA: Mellor lifts lid on all-new electric bus range". Mellor Bus. 17 November 2021. Archived from the original on 30 November 2023. Retrieved 16 May 2022.
- ^ Crawford, Alex (17 January 2022). "Mellor Sigma: Zero emissions with zero compromise?". routeone. Retrieved 16 May 2022.
- ^ "Mellor's 7-metre Sigma public debut at ITT Hub". Bus & Coach Buyer. 10 May 2022. Retrieved 16 May 2022.
- ^ "Mellor to take Sigma electric as far as 13.5m as nine-metre debuts". routeone. 17 October 2023. Retrieved 23 October 2023.