The Mellor Sigma was a battery electricsingle-deck bus manufactured by Wisdom Motor in China and then 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]
The first Sigma for mainland Europe were ordered by Swedish operator Nobina for Gothenburg contract city services on behalf of the Västtrafic regional transport authority, with seven Sigma 7s destined for operation on Nobina's route T22 in the city's Angered and Bergsjön districts.[16] 42 more Sigma 7s were ordered for Gothenburg demand-responsive transport services operated by Connect Bus in February 2023,[17] and three Sigma 7s were delivered to the German city of Kiel's municipal bus operator Kieler Verkehrsgesellschaft [de] in August 2023.[18][19]
^ ab"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.
^ ab"Sigma". Mellor Coachcraft. Archived from the original on 30 June 2022. Retrieved 17 September 2017.
Media related to Mellor Sigma at Wikimedia Commons
