There is no single figure. “Truck” spans a pickup and a long-haul semi, and the power a truck charger needs comes from the duty cycle: how much energy the truck uses in a day, divided by the hours it stands parked. Work that division for your own trucks and the answer falls into one of two patterns — and in both, the grid connection behind the charger is the real project.
Key Takeaways
- Truck charger power is a division, not a catalogue figure: daily energy divided by parked hours, with margin.
- Return-to-base trucks need modest power over a long window; short-dwell trucks need high power.
- The public DC frame is the DOT’s 50–350 kW band; megawatt charging is a separate heavy-truck system above it.
- The grid connection is the real project; the charger is the small part.
The Method: Energy Against the Window
Start with the truck’s own numbers. Daily energy comes from the vehicle’s trip record or the maker’s consumption data for its actual work. The window is the time the truck is parked and available to charge. Divide the first by the second:
- Daily energy ÷ parked hours = the average power floor. A charger must sustain at least this across the window, with margin for cold days and heavier loads.
- As an illustration only: a truck that uses 240 kWh in a day and parks for eight hours needs an average of 30 kW across the window. Put your trucks’ figures in the same division.
- The truck also has a ceiling. Its stated charging acceptance caps what it can take. Power installed beyond that ceiling is never used.
The same division sizes depot charging for lighter vehicles — our guide to fleet depot charging for vans works it through at van scale. Trucks change the inputs, not the method.
The Two Depot Patterns
| Pattern | Duty | Charger class it points to |
|---|---|---|
| Return to base | The truck comes home every night and parks for many hours | AC or modest DC — the long window does the work |
| Short dwell | The truck turns around between shifts or pauses mid-route | High-power DC — power has to replace the dwell the truck does not have |
On the road, the public frame is the U.S. DOT’s DC fast charging band of 50–350 kW, listed for the car network. Trucks whose inlets fit draw on the same band — see how fast a DC fast charger is. Above that band, a dedicated megawatt class for heavy trucks is being built — a separate system, not a bigger depot post.
The Real Project Is the Grid Connection
At truck scale, the charger is the small part. The supply behind it is the project:
- Capacity. Several trucks charging together can out-draw everything else on the site combined. Whether the existing connection carries the design is the utility’s answer, in writing.
- Lead time. A supply upgrade is a utility project with its own queue. It routinely takes longer than installing the chargers, so it starts first.
- Staging. Sensible designs install for today’s fleet with the route to expand — bays and supply headroom planned once, chargers added as the fleet grows.
- Cost scale. The DOE cites public DC fast charging at roughly $38,000–$90,000 of equipment plus $20,000–$60,000 of installation per charger. Those figures describe public car-scale installs, not a truck depot quote — power is never a free upgrade.
The DOE’s infrastructure development guidance plans in that order: supply first, hardware second.
Where EVDANCE Hardware Fits — and Where It Does Not
Plainly: EVDANCE sells no heavy-truck charger. Its DC unit, the EV-RHDC30K-L, is a compact charger of 22 kW DC with OCPP 1.6J and an IP54 enclosure — the class that turns cars, vans and light trucks around at a depot. The EV-AC03201T dual-connector AC station covers overnight charging for light vehicles, two at a time. Both are in the commercial EV charging range, and neither should be specified for a heavy truck. A heavy-truck depot is designed from the truck maker’s specification, by a site engineer, against the utility’s offer.
Frequently Asked Questions
Can a truck simply use the most powerful DC charger available?
Only up to the truck’s own stated acceptance, and only where its inlet fits. Beyond that ceiling the extra power is unused; at a depot the site’s supply becomes the limit first.
Does every truck depot need megawatt charging?
No. Megawatt-class charging serves the short-dwell heavy pattern — trucks that must gain a large share of a battery inside a break. Return-to-base trucks are served by far lower power.
Who decides the final charger specification for a depot?
Three documents together: the truck maker’s charging specification, the site electrical design by a qualified engineer, and the utility’s connection offer. A charger catalogue decides none of it.
Related Reading
- How Do Commercial EV Charging Stations Work?
- How Fast Is a DC Fast Charger?
- Fleet Depot Charging: How to Size AC Chargers for Vans and Light Commercial Vehicles
