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Electric articulated buses are not like other buses

ebusco
Solaris Urbino 18 Electric passes Telenor Arena

Were electric buses in Oslo a mistake? Let's take a closer look at the electric articulated buses - with a focus on winter characteristics and range in the cold.

 

Articulated buses are ideal for "hop on - hop off" in city traffic. People get in and out of the bus easily through wide doors and a flat floor inside the bus provides space for prams and suitcases. Had there been one Boat, I would compare the articulated bus to a large flat-bottomed raft. Easy access and plenty of room for people on board, but only built for traffic in sheltered waters. Can be difficult to maneuver in certain weather conditions.

Winter properties

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Traction on the 3rd axle is not optimal in winter driving
One of the biggest challenges with articulated buses is that the engine is at the back, connected to the bus's 3rd axle, i.e. the axle of the "trailer". This can cause challenges on winter driving, especially if the bus is turning. Look at the figure and imagine that the bus is standing on a slight uphill slope on a snow-filled road. Several bus manufacturers of electric articulated buses, including Ebusco and MAN, now make buses with traction on the 2nd axle on the "trekkvogna". Solaris has announced that they will also come with this. Electric drivetrains make it possible to put a motor on each axle with electronically controlled multi-wheel clutch, in the same way as we know from electric cars such as Tesla.
 
The design is the same on all articulated buses, regardless of whether they are powered by diesel, hybrid or electricity, but weight distribution can play an important role. A diesel engine under the rear seat helps to provide weight over the drive wheels. The batteries in electric articulated buses are usually placed in the roof, but batteries can also be placed in the back.

Range in the cold

Newer articulated buses of the Solaris Urbino type have battery packs with 520 kwh which give a range of up to 300 km. As an example, a bus (route 31) will be able to drive round trip Snarøya – Tonsenhagen 4 times within 8 hours, a total of 160 km. Theoretically, this should be fine - even in the cold, if it weren't for the fact that the buses also have to be heated. In an interview in Nettavisen, the bus driver said Marit Sauge that the drivers do not have access to preheat the buses from the charging socket before they are started, so that they have to use the batteries to raise the internal temperature from minus degrees. I hope the bus operator arranges for this before next winter. Preheating the passenger compartment and batteries is important to get more out of the batteries in cold weather.
 
I do not know the battery capacity of "older" buses from 2019. The VDL Citea, for example, is a bus model that has been in use for a long time. This can today be delivered with a battery capacity of up to 420 kwh, but also with smaller capacities such as 216 and 289 kwh. It is clear that this will not be sufficient for the longest routes/shifts. New buses from Ebusco, which will enter traffic during 2024, offer a significantly higher range than today's buses.

Electric articulated buses in Oslo

Here is an overview of the buses in Oslo. The number of registered buses is based on elbilstatistikk.no og regnr.info. The data is taken from the manufacturers' brochures, and compared with notices on vegvesen.no.

 

BYD E-Bus articulated bus

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BYD E-Bus 18 meters (Source: BYD Europe)

Country of manufacture: Hungary
Number of registrants: approx. 190
Year models: 2019, 2020, 2021 and 2023.
HP: 360
Battery capacity: Up to 422 kwh (2024)
Range: 250 km
Max axle load kg: 1-7100, 2-10000, 3-12000


 

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A VDL Citea 18 meter articulated bus registered in 2022 (Photo: felixtm/Depositphotos.com)

VDL Citea SLFA-180/181

Former DAF Bus (among other things).

Country of manufacture: The Netherlands
Number of registrants: approx. 120
Year models: 2019, 2020 and 2022.
HP: 326
Battery capacity: Up to 420 kwh (2024)
Range: 250 km
Max axle load kg: 1-7700, 2-10500, 3-12000


 

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Solaris Urbino 18.75 Electric (Source: Solaris)

Solaris Urbino 18

These are the newest articulated buses in the fleet. Solaris has announced that they will be able to deliver articulated buses with operation on both 2nd and 3rd axles, which will be able to provide significantly better winter characteristics. Today's buses in Oslo only pull on the 3rd axle.

Produksjonsland: Polen
Number of registrants: approx. 183
Year models: 2023.
HP: 326
Battery capacity: 520 kWh
Range: 300 km
Max axle load kg: 1-7200, 2-11000, 3-12600


 

MAN Lion's City 18

MAN Lion's City 18

Updated 29.01.2024
MAN delivered 17 electric articulated buses during November and December last year (2023). According to the supplier, these buses will operate in Oslo Nord and Oslo East. I have not yet seen the buses with my own eyes, so I don't know if they are scheduled, or if they are just being tested. One thing is certain – all the articulated buses pull on both the 2nd and 3rd axle. Nice that MAN is coming back to Oslo's streets. Who doesn't remember the old Büssing/MAN buses?

Country of manufacture: Germany
Number of registrants: 17
Year models: 2023
HP: 2 engines, a total of 544 hp
Battery capacity: Up to 640 kwh
Range: Up to 350 km
Max axle load kg: 1-8000, 2-11500, 3-12500


 

Ebusco 3.0 18 meters (Source: Ebusco)

Ebusco 3.0 18 meters (coming in 2024)

The buses are on order but not yet delivered and registered. The buses from Ebusco are distinguished by being extremely light, which should give a longer range. Another novelty is that they have operation on the 2nd and 3rd axle, which gives better winter properties. Bought in by Nobina, which operates in Lillestrøm and Follo. It is uncertain whether the buses will be deployed on route 20 as shown in the picture.

Country of manufacture: The Netherlands
Number of registrants: 0
Year models: Expected 54 articulated buses in 2024
HP: 2 engines of 180 hp
Battery capacity: 500 kwh - Cobalt-free batteries from CATL
Range: Up to 700 km
Max axle load kg: 1-8165, 2-10350, 3-8165

Press release from Ebusco about new buses to Oslo


See

car route Skien - Porsgrund
The SKien – Porsgrund car route