Aberdeen Paid £556k Per Hydrogen Bus. Five Years Later, First Bus Is Paying £30k

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Aberdeen’s hydrogen double-deckers have finally produced a useful market price, and it is more revealing than another theoretical argument about fuel-cell efficiency, hydrogen costs or refuelling infrastructure. First Bus is set to buy 23 Wrightbus StreetDeck Hydroliners for £30,000 each. Aberdeen City Council originally spent about £13.9 million on the 25-bus fleet, an average of roughly £556,000 per vehicle, which means the commercial operator taking almost the entire fleet is paying just 5.4% of the original average acquisition cost. These are not elderly buses being disposed of after 15 years of service. They entered service in 2021 and accumulated only about three and a half years of revenue operation before hydrogen-supply problems left them parked.

The number matters because Aberdeen actually tested the market rather than simply estimating residual value on a spreadsheet. The confidential council briefing obtained by the Press and Journal says Aberdeen received four other bids after approaching the market, including proposals to take buses for free and another offering £1 per vehicle. First’s £30,000 therefore should not be interpreted merely as an unusually aggressive negotiation by a sophisticated buyer. The city went looking for purchasers and discovered what organizations were prepared to pay for relatively young specialist zero-emission vehicles whose original drivetrain no longer had much obvious commercial appeal. When Aberdeen first announced that it wanted to dispose of the fleet, I argued that there was no deep or liquid secondary market for used hydrogen buses. We now have a real transaction against which that proposition can be tested.

This is the short version of a deeper TFIE Strategy Briefing analysis that tests what the £30,000 price actually means once normal fleet depreciation, the value of the underlying bus and the economics of removing the hydrogen system are put on the same basis. The sale price is the first verdict. What First Bus does next is the more interesting one.

What First is buying is equally important. It does not appear to be buying 23 hydrogen buses because it wants to expand hydrogen operations. The council briefing says First is drawing up plans to overhaul them for battery-electric use. That is technically plausible, but it is not simply a matter of replacing one box with another. A fuel-cell bus already has electric traction, yet a useful battery conversion still means removing the hydrogen storage and fuel-cell system, finding space and structural capacity for several hundred kilowatt-hours of batteries, managing weight distribution and axle loads, integrating charging and thermal management, adapting controls and auxiliaries, and certifying and warranting the resulting vehicle. The £30,000 acquisition price is therefore only the opening number in a much larger decision about how much additional capital these vehicles deserve.

First is about as well positioned as any operator could be to investigate that decision. It has operated the Hydroliners since new, so it knows their maintenance histories and operating condition. It has also already made a substantial commitment to battery-electric operation in Aberdeen: its £12.7 million investment in 36 electric buses included 24 new Wrightbus battery-electric double-deckers and 12 existing buses repowered from internal combustion to battery electric. Its King Street depot has rapid DC charging infrastructure, and First was the first UK operator to order conversions from Wrightbus’s NewPower business after helping develop the programme with two trial vehicles. This is not a buyer encountering bus repowering for the first time.

Yet First has not publicly committed to converting all 23 former hydrogen buses. The council briefing says it is developing plans for electric conversion, but there is no disclosed battery capacity, conversion supplier, final engineering configuration, cost per vehicle, warranty package or return-to-service schedule. The vehicle transfers themselves are staged, with seven expected before the end of March 2027 and the remaining 16 during financial year 2027–28. There is no public evidence of a contractual walk-away option, so this should not be described as a formal conversion trial. Economically, however, First has limited its exposure very effectively. Buying a known five-year-old StreetDeck chassis and body for £30,000 is cheap. Committing serious capital to turn it into a reliable battery-electric bus is a separate decision.

That distinction is why the Aberdeen case deserves attention beyond one Scottish fleet. Public clean-transport programmes routinely compare acquisition costs, grants, fuel expenses, operating emissions and infrastructure requirements, but residual value and exit optionality receive much less attention. A technology can work in service and still destroy capital if it creates an asset that few buyers want when the original operating model breaks down. Aberdeen has already absorbed almost all of that capital loss, leaving First with extremely inexpensive donor vehicles and enough economic headroom to investigate a conversion that would look very different if it first had to pay a normal used-bus price.

There are two useful ways the next stage can go. If First develops a reliable and economical conversion package, Aberdeen will show that at least some stranded hydrogen buses can be salvaged under unusually favourable conditions: relatively young vehicles bought for almost nothing, acquired by the operator that has known them since new, based on a familiar platform and supported by existing battery-bus expertise and charging infrastructure. That would be a useful result, but it would not demonstrate that hydrogen buses retained substantial resale value. Much of the useful value would instead have been recovered by removing the equipment that made them hydrogen buses.

If First cannot make the conversion economics work under those conditions, the conclusion becomes much less comfortable for other stranded hydrogen fleets. Few are likely to combine such a low donor-vehicle price with such young buses, an experienced incumbent operator, existing charging, a familiar chassis and an established repowering relationship. Aberdeen has already received one answer from the used-vehicle market: a bus that cost roughly £556,000 five years ago is worth £30,000 to the commercial operator taking almost the entire fleet. The more interesting question now is how much First decides those buses are worth after the hydrogen equipment comes out.

The full TFIE Strategy Briefing analysis works through the residual-value reference class, conversion economics and what either outcome would mean for other stranded hydrogen fleets.