A Real‑World Fleet TCO Calculator
Most “total cost of ownership” calculators look clean on a slide, but they quietly ignore the things that actually break your business case: tachograph limits, charging downtime, and payload penalties. They end up flattering battery‑electric and hydrogen trucks compared to diesel, or vice‑versa, because they treat vehicles like they run in a physics lab, not a real fleet.
So I built a fleet TCO calculator that starts from how fleets actually run, then layers cost on top of that.
Start With Operations, Then Add Cost
Instead of asking “what’s the fuel spend per truck?”, the calculator first asks: how many vehicles do you really need to do the work? It sizes the fleet based on real‑world constraints, then prices the result.
It explicitly accounts for:
- Real‑world BEV range rather than brochure numbers
- Charging time and how it eats into daily mileage capacity
- Payload loss from battery weight, and the extra trips that implies
- Additional vehicles required when daily capacity falls
- Driver costs scaling with fleet size, not just miles
Once you’ve sized the fleet, you can see how the cost stack shifts between diesel, battery‑electric and hydrogen, rather than assuming “one vehicle of each” and hoping the maths still makes sense.
If you want to explore this in detail, the Real‑World Fleet TCO Calculator lets you plug in your own workload, operating days, and cost assumptions.
Up‑to‑Date Assumptions, Not Wishful Thinking
The model uses current market and efficiency data for heavy‑duty vehicles, and it’s aimed at operators who need numbers they can put in front of a board, lender or infrastructure partner.
You can adjust:
- Fuel and energy prices
- Vehicle capex for diesel, BEV and hydrogen
- Annual mileage and duty cycle (urban vs long‑haul)
- Driver costs and analysis period
It works across LCVs, HGVs and buses, and shows you where each drivetrain starts to make sense – and at what point it becomes genuinely competitive with diesel.
If you want to zoom in on a single vehicle and see the exact tipping points on fuel prices, the Commercial Fleet Break‑Even Analysis: Diesel vs BEV vs Hydrogen digs into those parity points in more detail.
Real operating data turns a fleet model into commercial evidence. Economic competitiveness cannot be established from brochure range or nominal energy cost when payload, downtime, driver hours and additional vehicles change the workload delivered. In the Seven Barriers framework, the relevant test is whether a cleaner drivetrain remains competitive after those operational effects are priced honestly. A transparent model also shows which assumptions need validation in a pilot before a board, lender or customer can support wider adoption.
Who This Calculator Is For
If you run a commercial fleet and need to defend investment decisions to a board or lender, this fleet TCO calculator is for you. It gives you a transparent, tweakable model you can use to sanity‑check vendor claims and build your own view of when BEV or hydrogen actually beats diesel for your routes.
Help Me Break It
I’ve tried to keep the tools ruthlessly grounded in how fleets actually operate, but they’re still evolving. If you spot anything off in the assumptions, find a duty cycle it doesn’t handle well, or see odd behaviour in the outputs:
- Drop me a line via the contact page with your inputs and a screenshot, or
- If you’re working on a live procurement, pilot or financing round, use the advisory page and we can pressure‑test your strategy together.
In the meantime, please have a play with the calculators and let me know what you think.
If this connects with something you are working on, send me a note. I am interested in serious conversations around hydrogen, batteries, infrastructure, advanced materials and deep tech commercialisation.
