Mellor Sigma
| Mellor Sigma | |
|---|---|
Wonder Bus Mellor Sigma 7 in Wells-next-the-Sea in November 2024 | |
| 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 range manufactured by Wisdom Motor in China and sold in Europe by Mellor Coachcraft between 2021 and 2024. It was available in various lengths, from 6.99 – 13.50 metres, with the shortest being marketed as the Mellor Sigma 7, and the longest as the Mellor Sigma 13.
The Sigma was created as a zero-emission single deck vehicle, marketed as improving "demand for cleaner solutions to public transport". 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.
Mellor initially launched the Sigma with the Sigma 7 and Sigma 10 models, 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, 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.
As of May 2024, Mellor Coachcraft had ceased to market the Sigma bus range.