“Battery production makes electric heavy trucks worse than diesel over their lifetime”

The battery adds emissions upfront; the truck keeps using energy for years

Battery cells and packs require energy-intensive materials and manufacturing, so a battery truck starts with more production emissions than an otherwise comparable diesel truck. That is a real cost in the climate ledger. It is only one part of the ledger, though. A cradle-to-grave comparison also counts vehicle manufacture, maintenance and recycling, plus the extraction and production of diesel or electricity and the energy consumed over the truck's working life. The 2026 U.S. Argonne/PNNL study includes these stages for a Class 6 box truck, a Class 8 regional truck and a Class 8 long-haul truck. For its current case—2021 vehicle technology and the 2021 average U.S. electricity mix—the study estimates 10–60% lower life-cycle GHG emissions for battery-electric vehicles than diesel, depending on class and duty cycle, and reports the lowest emissions per ton-mile for BEVs among its current-case powertrains. The per-ton-mile advantage narrows for its weight-limited Class 8 long-haul truck: the modeled reduction is 8% versus diesel, compared with 26% for the baseline-payload BEV. In high-technology 2035 scenarios, fuel-cell trucks have the greatest per-ton-mile reductions among the modeled powertrains for weight-limited regional and long-haul trucks. These are modeled scenarios, not measured fleet outcomes. ^[2]

This difference between the vehicle-production phase and the full vehicle lifetime matters especially for trucks. Diesel engines burn fuel throughout operation, so fuel-cycle emissions accumulate over every mile. ICCT's European assessment says fuel consumption accounts for more than 90% of lifetime emissions for diesel and natural-gas trucks; the battery-electric vehicle pays more of its carbon cost near the start and then uses energy much more efficiently. A higher manufacturing footprint therefore does not establish a higher lifetime footprint. ^[1]

The electricity system can change the size of the benefit

The ICCT analysis of 2021 European vehicles estimates battery-electric heavy-duty vehicles have 63–76% lower lifetime emissions than diesel using average EU electricity, with reductions up to 92% in its 100% renewable-electricity cases. For one illustrative 40-tonne tractor-trailer produced in 2021 and driven in the EU from 2021 to 2040, the study's approximate life-cycle totals are 1,270 gCO2e/km for diesel, 460 for battery electric using the modeled EU grid, and 200 using renewable power. These are vehicle-kilometre values for that defined use case, not a universal freight emissions factor. The ICCT report was corrected in August 2024 for a manufacturing factor; the correction changed absolute glider emissions but not the relative ranking. ^[1]

Regional results underline why a truck LCA must state its electricity mix. A 2024 Australian probabilistic assessment found diesel trucks had lower life-cycle GHG emissions in its 2019 scenario, when coal generated most electricity. Under its decarbonized 2050 energy assumptions, battery-electric trucks instead had about 75–85% lower life-cycle emissions. The paper models three truck categories with uncertainty distributions, rather than reporting matched electric and diesel trucks observed over their entire lives. ^[3]

Recent comparisons cover the United States and China too

The U.S. study varies duty cycle, vehicle class and technology, and its 2035 results use a high-technology progression that the authors describe as technically achievable but potentially not economically viable. Across those cases, the authors emphasize that very low emissions require low-carbon electricity or fuels. ^[2] A separate Southern California analysis gives a useful real-world operating check: it pairs battery-truck telematics and charging records with measured diesel emissions and estimates about 75% lower well-to-wheel CO₂e for electric trucks on the 2020 utility mix. That result excludes manufacture, battery production and end-of-life, so it cannot be called a full life-cycle result. ^[5]

For China, a 2024 dynamic model projects a single electric heavy truck against a diesel counterpart under three electricity pathways from 2023 to 2050. It estimates 52.0–54.4% lifetime carbon reductions and finds operation contributes more than 90% of each truck's modeled life-cycle emissions. The model says each 1 g CO₂/kWh decline in electricity intensity reduces the electric truck's modeled life-cycle emissions by 1.74 tonnes. These are scenario outputs, not a measured fleet average. ^[4]

What the evidence supports

The evidence supports a conditional but consistent conclusion: battery production raises upfront emissions, while efficiency and lower-carbon electricity generally reduce lifetime emissions. A coal-heavy grid can erase or reverse the advantage in some truck categories and years, as the Australian 2019 case demonstrates. Cleaner grids strengthen it. Payload, annual mileage, lifetime kilometres and battery replacement assumptions can also move the result. The right comparison asks how much freight two specified trucks move over the same route and life, and counts emissions from both the vehicle and its energy supply. Current studies are mainly modeled life-cycle estimates supported in some cases by real-world energy-use data; they are not decades-long observations of entire truck fleets.