Ten truths about electric trucks and buses

This is true from 16-40t trucks, according to a study by Ricardo Research (2020), which compared emissions of the differing drivetrain technologies based on a WTW approach. The emission-saving potential of electric vehicles (EVs) increase when entirely powered by renewable energy (up to 81%) compared to a fossil-powered alternative as shown by study ICCT (2021) undertaken in passenger cars. As battery-eletric trucks (BETs) have outstanding energy efficiency, lifecycle emissions decrease with every additional kilometre driven, meaning that long-distance trucks have particularly high emission-saving potential.

Battery-electric buses (BEBs) do not produce local GHGs and air pollutant emissions, providing considerable health benefits, particularly in cities. Because they are powered by electricity, the higher powertrain efficiency means that BEBs emit 73% less CO2 equivalent than diesels, rising to 90% if powered by 100% renewable sources. In contrast (according to ICCT (2022)),Compressed Natural Gas (CNG) CO2 emissions are nearly 30% lower than a diesel, but its higher energy consumption - 24-50% per kilometre - reduces this advantage. In addition, methane is a potent GHG with a global warming potential more than 80 times greater than CO2 over a 20-year period; unintended leakages during extraction and transport further exacerbate the situation.

With smart grid technologies, the grid would need little adaptation for BETs and BEBs. Uni- and bi-directional charging enables a double optimization of the load at the depot. Optimising the grid connection and allowing the monetisation of the vehicles' flexibility capabilities makes them valuable assets, even when parked: it also provides the grid with supplementary battery capacity. Vehicle-to-grid (V2G) is performed at much lower power levels than in regenerative braking or fast charging.

Similarly, the higher investment costs of BEBs are offset by their lower electricity consumption and maintenance costs (in Spain and Latin America in 2021 and in Italy, US and UK by 2023). Bocconi University and Enel Foundation (2021) integrated well-known TCO (the initial investment in purchasing vehicles and the charging infrastructure, plus the operational and maintenance costs) with peculiar to BEBs circular economy revenue streams, by the second life of batteries and V2G. This explains why buses are now the fastest-growing zero-emission vehicle segment, making up 23% of new city buses in 2021, up from 16% in 2020. Considering the revenues from V2G and second life, BEBs are more cost effective than diesel and CNG buses.

BETs already have more than sufficient range to cover freight transport routes in Europe, something that will continue to improve. With the compulsory 45-minute break every 4.5 hours, and given that they have a maximum permitted speed of 90km/h, trucks will never drive more than 400 km without having to stop. Tesla has begun deliveries of the ‘Tesla Semi’, a clean-sheet design BET with a real-world range of 800km when fully loaded. The EU’s Weights & Dimensions Directive allows ZETs to be increased by two tonnes over that of diesel trucks. This allowance alone already increases the payload-neutral range of electric trucks by over 300km.