Why TCO Math for Alternative Powertrains Must Be Fleet-Specific

How much does it cost to run a battery-electric or natural gas truck in your operation?

There is no single answer. Total cost of ownership for alternative powertrains must be calculated fleet by fleet, route by route, according to a new report from the North American Council for Freight Efficiency. National averages for electricity rates, fuel prices, and vehicle costs can lead a fleet into a money-losing spec decision because the variables that drive TCO, local utility rates, negotiated truck prices, terrain, payload, infrastructure strategy, differ too much between operations.

NACFE's Forecasting the TCO of Powertrain Alternatives: The Messy Middle Cost Report lays out a step-by-step process for fleets to build a custom TCO model. The report covers diesel, renewable diesel, biodiesel, compressed natural gas, renewable natural gas, battery electric, and hydrogen fuel cell powertrains. Emilia Sibley, NACFE's emerging technologies consultant and lead author, calls TCO a "bespoke calculation": what pencils out for one fleet can be a financial disaster for another.

What goes into a fleet-specific TCO calculation?

NACFE identifies several highly variable factors that must be tailored to the fleet's actual operation. Local electricity rates determine charging cost for battery-electric trucks. Fleet-specific infrastructure strategies, whether a fleet builds on-site charging or fueling, leases third-party access, or uses public networks, change the capital outlay and per-kilowatt-hour or per-gallon cost. Negotiated vehicle prices vary by order volume and OEM relationship. Routes, loads, and terrain determine fuel or energy consumption, which can swing TCO by thousands of dollars per truck per year.

The report includes a pre-analysis checklist and an eight-step process. Fleets must establish a true diesel cost baseline, map high-opportunity geographies where alternative fuels are available and cost-competitive, match the powertrain to the duty cycle, gather real-world quotes from OEMs and fuel suppliers, build the TCO equation with fleet-specific inputs, determine residual value assumptions, assess total operating economy, estimate a parity point where the alternative powertrain breaks even with diesel, and stress-test the parity window under different fuel-price and utilization scenarios.

Which powertrains win on TCO in which duty cycles?

NACFE's analysis found that battery-electric vehicles are the long-term economic winners when electricity rates are favorable and routes fit the range envelope. Return-to-base drayage operations are the "Goldilocks" lanes, predictable mileage, known charging windows, and short enough routes that battery capacity is not a constraint. Diesel's financial advantage is finite, meaning that as battery and charging costs fall and diesel fuel prices rise, the crossover point moves closer.

Compressed natural gas and renewable natural gas are the near-term hedge for fleets that need longer range than current battery-electric trucks offer but want to reduce fuel cost and emissions below diesel. Hydrogen fuel cell trucks occupy a niche defined by speed and payload, applications where refueling time must be short and weight capacity must be maximized, though hydrogen fueling infrastructure remains sparse.

What happens if a fleet uses national averages instead of custom inputs?

Relying on general national averages for electricity rates, diesel prices, or vehicle costs can lead a fleet down the wrong path, according to the report. A fleet in California with access to low off-peak electricity rates and state incentives will see a very different TCO for battery-electric trucks than a fleet in a state with high industrial electricity rates and no purchase subsidies. A fleet negotiating a 50-truck order will get a different per-unit price than a fleet buying two trucks. A fleet running flat terrain at gross vehicle weight will consume less fuel or energy per mile than a fleet running mountains at the same weight.

The report is designed to guide fleet owners through the financial realities of transitioning to alternative powertrains. NACFE plans a follow-up report, From Source To Highway: The Messy Middle Emissions Report, scheduled for early summer 2026. That report will move beyond tailpipe emissions to adopt a well-to-wheel perspective that integrates well-to-tank, tank-to-wheel, greenhouse gas emissions, and criteria pollutants.

What this means for small fleets and owner-operators

Small fleets and owner-operators cannot afford to spec an alternative powertrain based on industry averages or OEM marketing claims. The TCO calculation must use the fleet's actual electricity rate from the local utility, the fuel price the fleet pays at its home terminal or along its lanes, the negotiated truck price the fleet can get, and the mileage and payload the fleet runs. A battery-electric truck that works for a return-to-base drayage fleet in Southern California may not work for a regional fleet running variable routes in the Midwest. A natural gas truck that saves money for a fleet with access to a private CNG station may cost more to operate for a fleet relying on public fueling.

Fleets considering alternative powertrains should gather real-world quotes from OEMs, fuel suppliers, and infrastructure providers before making a purchase decision. The NACFE report provides a framework to organize those inputs into a TCO model that reflects the fleet's actual operation, not a national average that may not apply.