Why EHGV Charging Sites Are a Different Job
There is a tempting assumption about electric HGV charging, which is that it is car charging with bigger equipment. Same principle, larger units, done.
It is not, and the differences start well below the surface. Most of what makes an EHGV site harder to build has nothing to do with the chargers at all.
The vehicle sets the geometry
An articulated vehicle needs far more room to manoeuvre than a car, and that single fact reshapes the whole site. Bay length, bay width, circulation space and turning areas all grow, and they grow before anyone has decided which charger is going where.
It is why public charge points built for cars are so rarely usable by trucks. The bays are the wrong size, the access does not suit the vehicle, and a single HGV parked badly can block several units at once. Cable reach becomes a design constraint rather than a detail, because where the inlet sits on a truck is not where it sits on a car.
For the civils, that means a larger footprint of construction. More excavation, more sub-base, more surfacing, more drainage to fall correctly across a bigger area.
Loadings change everything under the surface
This is the difference that matters most and gets noticed least.
A car park build-up is designed for cars. An EHGV bay carries axle loads from a fully laden articulated vehicle, repeatedly, in the same positions, often with the vehicle stationary for hours at a time. Static loading in fixed spots is harder on a surface than passing traffic, and it is unforgiving of a sub-base that was specified optimistically.
So the build-up gets deeper, the material specification gets heavier, and compaction matters more at every layer. Getting that wrong does not show up at handover. It shows up as rutting and settlement six months later, in a bay the operator cannot take out of service.
Bases carry more than a charger
Charger foundations on an EHGV site are doing more work. The units are larger and heavier, the associated equipment takes up more room, and the loads around them are significantly greater than on a car site.
There is also usually more equipment to found. Alongside the chargers themselves, sites of this kind need bases and enclosures for the distribution equipment that feeds them. Those foundations, and the ducting routes between them, are civils work even though what eventually sits on top of them is not.
Drainage across a bigger, harder area
A large area of new hardstanding has to send water somewhere, and the falls still have to keep it away from the units. On a car park that is straightforward enough. Across a truck yard with long bays, turning circles and heavy surfacing, it takes more planning and more drainage.
It also has to survive the same loadings as everything else. Gullies, channels and covers in a truck yard need to be specified for the traffic actually crossing them, not for a car park.
Duct routes have to anticipate what comes next
Power levels for heavy vehicle charging are rising quickly, and megawatt charging is the direction the sector is heading. That has a very practical consequence for groundworks: conductors get larger, so ducts need to be sized and routed for what is coming rather than what is being installed today.
Retrofitting a duct route through a finished truck yard is expensive and disruptive. Putting in capacity at the point the ground is already open costs comparatively little. It is one of the few places on an EHGV project where a small decision early saves a large amount later.
Depots do not stop
Most electric HGV charging happens at the operator’s own depot, because these vehicles return to base and charge overnight. That means the site you are building on is a working logistics operation with vehicles moving through it every day.
There is rarely a convenient shutdown window. Works have to be phased so that vehicle movements continue, which usually means building the yard in sections, maintaining access routes throughout, and sequencing so that no part of the operation is cut off. It is slower than building it in one go, and it is the only way the operator can say yes.
The short version
An EHGV charging site is a heavy civils job with chargers on it. The bays are bigger, the ground works harder, the drainage covers more, the ducting has to allow for growth, and the whole thing has to be built around an operation that cannot stop.
Priced as a car park with larger bays, it will not hold. Priced and sequenced for what it actually is, it is a straightforward piece of work — just a bigger one than it looks on the drawing.
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