Electric Buses Are the Key to the Zero-Emissions Future of Public Passenger Transport.

Electrification of buses has shown a steady rise, which is unsurprising in view of the discussions surrounding pollution levels in cities. This has also resulted in an increase in providers of electrically powered buses. In order to illustrate the importance of electric mobility in public transport, we have summarised all key information on electric buses for you here.

Benefits of Electric Buses

Zero Emissions and Low-Noise Operation

No Access Restrictions

Greater Energy Efficiency

Excellent Ride Comfort for Passengers and Drivers

Low Maintenance Requirement

Lower Operating Costs than Diesel Buses

Everything You Need to Know About Charging Electric Buses

Two options are currently available for the charging of electric buses:

Depot Charging

Depot charging means charging of electric buses in the bus depot. Charging is mostly done via a charging station with plug, and is always carried out when the buses are in the depot and connected to charging stations – mostly during lengthy downtime overnight or between two schedules. Charging events can be flexibly managed based on the downtime. The resulting grid load is therefore reduced, and significant investment and operating costs saved.

Depot charging is characterised by the following:

  • Used to charge all buses while they are not in service in the depot
  • Long downtime
  • Charging requirements are met
  • Flexibility with regard to charging power and charging time
  • Cost-optimised charging infrastructure solution
  • Implementation of smart load management optimises energy consumption and costs

Opportunity Charging

Opportunity charging takes place along the electric bus route. It is mainly carried out when depot charging is unable to service specific routes. The charging facilities are installed at specific stops along the route at which the bus stands for a certain amount of time (e.g. final stops). The e-bus battery is recharged with very high power for a short period on arrival at the stop. A much-used charging solution for opportunity charging is the pantograph.

The following are features of opportunity charging:

  • Used for buses with a low range or long routes (assuming bus compatibility and configuration)
  • Short charging times
  • High charging power
  • High investment costs for charging infrastructure
  • Low cost-down potential in operation
  • Less flexibility with regard to charging requirements

Charging Types

Essentially, charging types are split into two groups: Alternating current (AC) charging and direct current (DC) charging

Explanation: Batteries for electric vehicles can only be charged with direct current. Our power grids supply direct current or alternating current depending on the location and voltage. To convert the AC into direct current, rectifiers are needed to charge the battery if an alternating current connection is used.

In the case of plugs for DC charging, these rectifiers are already in the charging station and not installed in the vehicle, and therefore enable greater charging power than with AC charging. In AC-charged vehicles, less powerful rectifiers are fitted in the vehicle for space reasons, which limits the amount of charging power.

 Plugs for AC Charging

  • Type 1 plug: for Asian models; charging power up to 7.4 kW
  • Type 2 plug: for European models; charging power up to 22 kW or 43 kW

 Plugs for DC charging

  • CHAdeMO plug: Quick-charge system from Japan; up to 100 kW
  • CCS plug: Quick-charge function with AC and DC; charging power up to 170 kW (350 KW)
  • Pantograph: On-route charging up to 450 kW
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Manufacturers of Electric Buses

Manufacturer:Solaris
Models:Urbino 12e | 18e
Capacity:240 kWh
Power:160 kW | 240 kW
Charging Mode:CCS & Pantograph
Manufacturer:BYD
Models:Enviro 200 EV
Capacity:variabel
Power:100 - 180 kW
Charging Mode:AC
Manufacturer:Sileo
Models:S12 | S18
Capacity:300 kWh | 450 kWh
Power:240 kW | 480 kW
Charging Mode:CHAdeMO
Hersteller:Irizar
Modelle:i2e
Kapazität:282-367 kWh
Leistung:180 kW
Ladeart:CCS
Hersteller:VDL
Modelle:SLF120 | SLFA180
Kapazität:n.a.
Leistung:153 kW | 210 kW
Ladeart:CCS & Pantograph
Hersteller:Volvo
Modelle:7900 Electric
Kapazität:4×19 kWh
Leistung:180 kW
Ladeart:CCS & Pantograph
Manufacturer:SOR
Models:NB 12 Electric
Capacity:225 kWh
Power:160 kW
Charging Mode:Pantograph
Manufacturer:Caetano
Models:e.City Gold
Capacity:85 kWh – 250 kWh
Power:160 kW
Charging Mode:CCS
Manufacturer:Proterra
Models:Catalyst 35/40 Foot
Capacity:94-440 | 94-660 kWh
Power:2×190 kW
Charging Mode:CCS & Pantograph
Manufacturer:Ebusco
Models:Electric City Bus 2.1
Capacity:311 kWh
Power:110-220 kW
Charging Mode:CCS
Manufacturer:Ursus
Models:City Smile 12M
Capacity:n.a.
Power:n.a.
Charging Mode:n.a.
Manufacturer:Daimler
Models:Citaro E-Cell
Capacity:n.a.
Power:150 kW (CCS)
Charging Mode:CCS & Pantograph
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