Download certificate Download summary sheet Vehicle Information Manufacturer: Mellor Model: Sigma 7 Technology: Battery-Electric Vehicle Type: Bus Bus Type: Single Deck Vehicle Length (m): 7.2 Total passenger capacity: 30 Seated capacity: 9 Measured Unladen Weight (kg): 5,681 Zero Emission Capability Estimated Range (km): Up to 197 Battery Capacity (kWh): 142 Hydrogen Tank Capacity (kg): N/A Vehicle Energy Consumption (kWh/km) - UKBC Average: 0.57 Grid-to-Wheel (Charging) Efficiency (%): 93% Overall Energy Efficiency (kWh/km): 0.63 Environmental Credentials WTW greenhouse gas emissions (CO2e/km): 192.4 WTW CO2e per passenger km: 6.4 WTW saving compared to Euro VI diesel equivalent (%): 75% Download certificate Download summary sheet Email Website Back to certificates hub