Zero Emission Bus Certificates

This page displays the Zero Emission Bus (ZEB) certificates for models that qualify for capital grant funding in the UK, such as the ZEBRA or ScotZEB schemes, as well as the Zero Emission Bus BSOG uplift in England.

ZEB accreditation is required to ensure public money supports proven technologies that will perform in-service. Certificates enable local authorities and bus operators to understand the expected performance ahead of time and compare different suppliers and technologies.

To achieve accreditation and certification, vehicles must:

  • have no combustion engines on-board (including diesel heaters)
  • produce no regulated emissions from the tailpipe(s)
  • achieve a 50% well-to-wheel greenhouse gas saving compared to a conventional Euro VI diesel over the UK Bus Cycle.

Once a manufacturer or vehicle supplier has demonstrated a bus model achieves the ZEB standard, Zemo Partnership and DfT review the certificate and publish it below along with highlights of the vehicle's specifications and performance.

ZEB manufacturers and suppliers can then provide operators/local authorities with the ZEB test certificates and vehicle summary sheets which can then be used to claim capital grant funding and BSOG ZEB uplift in England.

Annual Updates

Zemo updates ZEB certificates each year on the 1st February with new emission factors for grid electricity and hydrogen. This is sourced from the ‘Government conversion factors for company reporting of greenhouse gas emissions’.

Certificates were last updated on 23rd January 2023.

Accredited Zero Emission Bus Models

The following models have been certified as Zero Emission Buses by Zemo Partnership following an independent test over the UK Bus Cycle.

Zemo will upload certified vehicles following OEM signatures on certificates.

Alexander Dennis BYD

Enviro 200EV

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 65
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 417.7 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 62%
Battery capacity: 348 kWh
Zero emissions range: Up to 290km / 181 miles
WTW CO2e per passenger km: 6.4 g CO2e / pass km

Download ZEB Certificate and vehicle summary sheet below

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Enviro 400EV

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 85
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 333.0 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 80%
Battery capacity: 382 kWh
Zero emissions range: 333 km / 208 miles
WTW CO2e per passenger km: 3.1 g CO2e / pass km

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Alexander Dennis

Enviro 100EV - 236 kWh

Status: Simulated ZEB status achieved

Technology: Battery Electric
Passenger capacity: 45
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 240.3 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 73%
Battery capacity: 236 kWh
Zero emissions range: 315 km / 196 miles
WTW CO2e per passenger km: 5.3 g CO2e / pass km

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Enviro 100EV - 354 kWh

Status: Simulated ZEB status achieved

Technology: Battery Electric
Passenger capacity: 40
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 251.3 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 71%
Battery capacity: 354 kWh
Zero emissions range: 451 km / 280 miles
WTW CO2e per passenger km: 6.3 g CO2e / pass km

Download Simulated ZEB Certificate below

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Enviro 400EV - 354 kWh

Status: Simulated ZEB status achieved

Technology: Battery Electric
Passenger capacity: 94
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 327.7 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 76%
Battery capacity: 354 kWh
Zero emissions range: 346 km / 215 miles
WTW CO2e per passenger km: 3.5 g CO2e / pass km

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Enviro 400EV - 472 kWh

Status: Simulated ZEB status achieved

Technology: Battery Electric
Passenger capacity: 85
Fuel: Average UK Grid Electricity 2021
WTW greenhouse gas emissions: 331.4 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 74%
Battery capacity: 472 kWh
Zero emissions range: 456 km / 283 miles
WTW CO2e per passenger km: 3.9 g CO2e / pass km

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Caetano

eCity Gold

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 65
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 356.2 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 67%
Battery capacity: 385 kWh
Zero emissions range: Up to 376 km / 235 miles
WTW CO2e per passenger km: 5.5 g CO2e / pass km

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EVM

Novus

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 15
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 147.5 g CO2e / km
WTW saving compared to Euro VI diesel equivalent: 76%
Battery capacity: 115 kWh
Zero emissions range: 249 km / 155 miles
WTW CO2e per passenger km: 9.8 g CO2e / pass km

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Mellor

Sigma 7

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 30
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 182.2 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 76%
Battery capacity: 142 kWh
Zero emissions range: Up to 197 km / 123 miles
WTW CO2e per passenger km: 6.1 g CO2e / pass km

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Sigma 8

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 54
Fuel: Average UK Grid for 2021
WTW greenhouse gas emissions: 254.8 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 74%
Battery capacity: 241 kWh
Zero emissions range: Up to 257 km / 160 miles
WTW CO2e per passenger km: 4.7 g CO2e / pass km

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Sigma 9

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 54
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 254.8 g CO2e / km
WTW saving compared to Euro VI diesel equivalent: 74%
Battery capacity: 241 kWh
Zero emissions range: 257 km / 160 miles
WTW CO2e per passenger km: 4.7 g CO2e / pass km

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Sigma 10

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 54
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 254.8 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 74%
Battery capacity: 260 kWh
Zero emissions range: Up to 281 km / 175 miles
WTW CO2e per passenger km: 4.7 g CO2e / pass km

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Pelican Yutong

E10/E12

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 70
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 265.3 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 77%
Battery capacity: 422 kWh
Zero emissions range: Up to 443 km / 276 miles
WTW CO2e per passenger km: 3.8 g CO2e / pass km

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TCE 12 Coach

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 50
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 361.7 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 63%
Battery capacity: 281 kWh
Zero emissions range: 312 km / 194 miles
WTW CO2e per passenger km: 7.2 g CO2e / pass km

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Switch Mobility

Metrocity EV

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 60
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 336.6 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 68%
Battery capacity: 226 kWh
Zero emissions range: Up to 219 km / 136 miles
WTW CO2e per passenger km: 5.6 g CO2e / pass km

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Metrodecker EV

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 98
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 423.6 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 70%
Battery capacity: 300 kWh
Zero emissions range: Up to 219 km / 136 miles
WTW CO2e per passenger km: 4.3 g CO2e / pass km

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Volvo

BZL Double Deck

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 81
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 429.1 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 65%
Battery capacity: 470 kWh
Zero emissions range: 345 km / 214 miles
WTW CO2e per passenger km: 5.3 g CO2e / pass km

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BZL Single Deck

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 86
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 367.3 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 72%
Battery capacity: 376 kWh
Zero emissions range: Up to 278 km / 174 miles
WTW CO2e per passenger km: 4.3 g CO2e / pass km

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7900EV

Status: ULEB and ZEB status achieved

Technology: Battery Electric
Passenger capacity: 86
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 367.3 g CO2e/km
WTW saving compared to Euro VI diesel equivalent: 72%
Battery capacity: 198 kWh
Zero emissions range: Up to 184 km / 115 miles
WTW CO2e per passenger km: 4.3 g CO2e / pass km

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Wrightbus

StreetDeck Electroliner - 340 kWh

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 98
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 230.3 g CO2e / km
WTW saving compared to Euro VI diesel equivalent: 84%
Battery capacity: 340 kWh
Zero emissions range: 400 km / 249 miles
WTW CO2e per passenger km: 2.4 g CO2e / km

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StreetDeck Electroliner - 454 kWh

Status: ZEB status achieved

Technology: Battery Electric
Passenger capacity: 87
Fuel: Average UK Grid Electricity for 2021
WTW greenhouse gas emissions: 236.2 g CO2e / km
WTW saving compared to Euro VI diesel equivalent: 82%
Battery capacity: 454 kWh
Zero emissions range: 484 km / 302 miles
WTW CO2e per passenger km: 2.7 g CO2e / km

Download ZEB certificate and vehicle summary sheet below

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Further information on ZEB Certificates

To discuss potential bus models that may qualify for ZEB accreditation, please complete the contact form below. 

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