Mercedes-Benz eActros 600: what 600 kWh means in service

The number in the name is the battery. Not a power output, not a tonnage: the eActros 600 is the Mercedes-Benz tractor unit built around roughly 600 kilowatt hours of usable energy, and almost every argument about whether battery-electric long-haul is real is an argument about what that quantity buys. The specification itself — variants, plated weights, axle configurations, what to ask about on a used one — sits on the eActros 600 model page. What follows is what those figures mean once the truck is working.

Two capacity figures, and what the gap is for

Mercedes-Benz publishes two battery numbers for this truck, under two separate headings with two separate footnotes, and the gap between them is the first thing to understand. The product sheet lists 621 kWh installed — three lithium iron phosphate packs of 207 kWh each — and 600 kWh usable, at 200 kWh per pack. The installed figure is defined in its footnote as the nominal capacity of a new battery, the usable figure as the capacity available for regular truck operation with new batteries, and both footnotes close the same way: based on internally defined boundary conditions, and liable to vary depending on use case and ambient conditions.

Subtracting one from the other leaves 21 kWh held back across the vehicle, or 7 kWh per pack; that subtraction is ours and appears in neither document. It is also the difference between two numbers the maker has just qualified, so it is a gap rather than a constant. Neither footnote explains the mechanism behind the reserve, and this page does not invent one. What the maker does claim is the commercial consequence: at the world premiere Daimler Truck stated that, in contrast to other battery cell technologies, approximately 95 percent of the installed capacity can be used with LFP technology, which “makes a higher range with the same installed battery capacity possible”.

Read as a buyer, that is a specification line in its own right. Installed capacity is what the truck weighs and what it cost; usable capacity is the only one of the two that divides into a distance or a charging session. A pack releasing a smaller share of its installed energy would have to be larger, and heavier, to do the same day’s work.

What the 500 kilometres was measured against

The published range is 500 kilometres without intermediate charging, and the footnote attached to it does more work than the headline. Mercedes-Benz states the figure was determined internally under specific test conditions, after preconditioning, with a 4x2 tractor unit at 40 t total towing weight and an outside temperature of 20 °C in long-haul operation, and that it may deviate from values determined in accordance with Regulation (EU) 2017/2400. That is the maker measuring its own vehicle in favourable conditions, and saying so.

Two numbers follow from it. The first is the one most often misread: the maker quotes up to 560 kilometres separately, for the most economical combination with three packs in classic long-haul at a gross train weight of 40 tonnes — but that one carries a different footnote, and a weaker one. Daimler Truck describes the 560 as an estimated range derived from the results of internal simulations as well as real driving tests, where the 500 is an internal determination under stated test conditions. They are not two points on one scale, and the 60 kilometres between them is not a measured uplift.

The second number is ours. Dividing the 600 kWh usable by the 500 kilometres gives 1.2 kWh per kilometre under those stated conditions, and the thing to notice is which side of the socket it sits on: 600 kWh is capacity available in the battery, while an electricity tariff meters at the plug. The charging and conditioning losses in between are not published, so this figure is energy out of the pack and cannot be multiplied by a tariff to reach a cost per kilometre without them.

The maker’s other framing is about the working day. Daimler Truck says the eActros 600 will be able to travel significantly more than 1,000 kilometres a day, made possible by intermediate charging during the legally prescribed driver breaks — and the release finishes that sentence with the clause that matters most to what follows: even without megawatt-charging. It also states that around 60 percent of the long-distance journeys made by Mercedes-Benz Trucks customers in Europe are shorter than 500 kilometres anyway, and that for those cases charging infrastructure at the depot and at the loading and unloading points is sufficient. That is a claim about one manufacturer’s own customer base, not a measurement of European long-haul, and it should not be repeated as one.

An hour on the charger, and what that does to a shift

The truck charges over CCS2 at up to 400 kW. What that yields is published as several windows measured under different sets of conditions, and they are not interchangeable.

Set those against the clock the driver runs on. The European Commission summarises the requirement under Regulation (EC) No 561/2006 as a break of at least 45 minutes, separable into 15 minutes followed by 30, to be taken after four and a half hours at the latest; the rest of that framework is in driving time and rest rules. No published CCS2 window fits inside one such break — not the hour, not the 70 minutes, and not even the two-pack eActros 400’s 46. The 30-minute megawatt figure does, and that is why the standard matters to this truck rather than any headline about power.

But that window is a quoted capability, not a socket the truck charges through today. The world premiere release says megawatt charging comes later, that customers can order a pre-installation for it from the start of sales, and that retrofit is planned once MCS technology becomes available and is standardised across manufacturers. And the same release says the more-than-1,000-kilometres-a-day claim holds even without megawatt charging. Those two statements sit awkwardly beside a 45-minute break that no CCS2 window fits, and the release does not reconcile them; this page will not do it on the maker’s behalf. What “MCS-capable” does and does not commit a maker to, and where the standard work has since got to, is set out in megawatt charging explained.

One sum makes the gap concrete, and it is ours: sixty percent of the 500-kilometre rating is 300 kilometres. Reading that as 300 kilometres bought back in an hour on CCS2 takes two steps the maker never takes. Nothing published maps a state-of-charge window onto the range figure, and the hour was measured under optimal conditions while the 500 kilometres was measured after preconditioning at 40 t and 20 °C — a different test. Treat it as the order of magnitude for time the vehicle spends stationary beyond the break the law forces anyway, not as a rating. The third pack cuts both ways here: it is what makes the 500 kilometres possible, and it is why three packs take around 70 minutes over the 10-to-80 window where the two-pack eActros 400 takes around 46.

What the packs cost in payload

This is where the specification stops being interesting and starts being billable. Start with two published figures: the 4x2 tractor weighs approximately 11.7 t unladen, and with a standard semitrailer in the EU Mercedes-Benz quotes a payload of around 22 tonnes, noting national law may in some cases permit more.

Against a diesel the order of magnitude is easy to see. Mercedes-Benz publishes a data sheet for the Actros L 1845 LS 4x2 semitrailer tractor with the L-cab BigSpace on a 3850 mm wheelbase: kerb weight 8,362 kg, gross vehicle weight 18,000 kg, 9,638 kg of payload and fifth-wheel load, and a gross combination weight of 44,000 kg. Set the electric tractor’s approximately 11.7 t against that 8,362 kg and the difference is about 3.3 tonnes — our subtraction, of two figures the maker publishes for two different vehicles.

Treat that as an indication rather than a weighing, and not only because the cabs differ and the wheelbases are 150 mm apart. The two masses are not defined the same way. The data sheet marks 8,362 kg as a ready-to-drive condition as specified by European Directive 97/27/EC; the product sheet gives the eActros figure as an unladen weight with no definition attached at all, footnoted only as depending on the features. Subtracting an undefined mass from a defined one and reporting the answer to 100 kg is not like-for-like, and owning the arithmetic does not make it so.

What the pair does settle is where the difference lands. Both vehicles carry the same 44 tonnes gross combination weight — the eActros 600’s technical figure and the Actros L’s data-sheet line are identical — so at the combination level the electric tractor’s extra tare comes out of payload and is not offset by anything. Its own plating is 4 tonnes higher, 22 t of technical gross vehicle weight against 18,000 kg, which is again our subtraction; and that gap is not the European allowance for cleaner powertrains. Annex I to Council Directive 96/53/EC raises the maximum authorised weight in international traffic by the additional weight of the technology, capped at one tonne for an alternatively fuelled vehicle and two for a zero-emission one — compensation for the mass, not extra carrying capacity — and it moves no axle limit: the driving axle stays at 11.5 tonnes, while the eActros rear axle is plated at 13 t. A manufacturer’s plating and an authorised weight are two different kinds of number, and the difference between them is set out in truck weights, gross vehicle and gross combination.

Mercedes-Benz answers the payload objection with a vehicle rather than an argument. The eActros 400 carries two of the same 207 kWh packs for 414 kWh installed, and the maker states it has an additional payload of more than 3 tonnes compared with the eActros 600, bringing it to over 25 tonnes with a standard semitrailer and, in its words, to the payload level of diesel trucks; the weight reduction also raises the maximum fifth-wheel load to 9.5 tonnes. Those are two configurations differing in more than pack count, so the 3 tonnes is not the weight of one battery pack — but it is the maker’s own measure of what the third one costs. The same release puts the trade plainly: battery packs determine range, payload and purchase price.

One labelling point belongs here. The GB product sheet heads the 44 t row “technically permissible gross trailer weight”; Daimler Truck’s own release calls the same 44 tonnes a gross combination weight the vehicle is technically designed for. Same figure, different label, and the model page records the discrepancy rather than resolving it.

Durability is what the second owner is buying

An electric tractor’s residual value is a battery question, and the ceilings are published. Mercedes-Benz designs the vehicle for up to 1.2 million kilometres in ten years of operation and says battery state of health should still be over 80 percent after that. The warranty on the high-voltage batteries stops a long way short of that design life, at a maximum of 72 months, 720,000 kilometres or 1,800 charging cycles, whichever is reached first.

Which of the three ceilings arrives first depends on the duty cycle. At the rated 500 kilometres per charge, 1,800 cycles would be 900,000 kilometres — our multiplication — beyond the 720,000 kilometre ceiling, so on a truck that empties and refills the pack every time, distance or time expires before cycles do. That holds only if a cycle means a full charge, and neither document defines the term, so a fleet charging in 20-to-80 percent bites cannot assume the same answer. Ask how cycles are counted. It is the same discipline that makes a service file worth more than an odometer when buying a used truck, and it feeds straight into truck depreciation and book value.

The number that decides it is not on the vehicle

Daimler Truck’s profitability claim is carefully bounded, and the bounds are the point. Time to cost parity with a comparable diesel differs from country to country, depending in particular on electricity and diesel prices and on the toll system. In the large transit countries of France and Germany the release named a low electricity price and the then-planned CO2-based truck toll respectively — the cheap electricity in France, the toll in Germany — as positive effects on the operational costs of battery-electric trucks, and on that basis said the eActros 600 can be more profitable than a diesel long-haul truck within an average holding period of around five years or after around 600,000 kilometres, despite a purchase price around two to two and a half times higher than the diesel equivalent. Where the toll side has since landed is in EU road tolls and CO2 classes; the rest of the cost stack belongs with tractor unit running costs.

What remains outstanding is the ground rather than the vehicle. Mercedes-Benz Trucks says the eActros 600 is already operating in over 15 European countries, and its chief executive states the condition plainly: for the transformation to succeed, the expansion of the charging infrastructure must keep pace with the vehicles and the operation must be profitable for customers. Both halves of that are conditions the buyer inherits, and neither is settled by anything printed on the truck. The rival worth reading alongside it is the Volvo FH Electric, which answers the same question with a different charging strategy; the diesel it is measured against is its own sibling, the Actros L.