Often, no. At many DC fast-charging sites, the slim post you plug into is a dispenser, not the whole charger. It holds the connector, the screen, the payment reader and the meter, while the heavy work — converting grid AC into DC — happens in a separate power cabinet standing nearby. Other sites combine both jobs in one all-in-one unit. For the driver the session feels identical, but the two layouts explain a lot of what you see on site.
Key Takeaways
- A dispenser is the driver-facing half of a split DC system: connector, screen, payment and metering.
- The power cabinet does the AC-to-DC conversion and the cooling, and can feed several dispensers.
- All-in-one units package both jobs together and suit smaller sites.
- Layout is a site-design choice; it does not by itself make charging faster or slower.
Two Ways to Build a Fast-Charging Site
A DC fast charger has to turn a three-phase grid supply into adjustable DC at 50 to 350 kW, the band the U.S. Department of Transportation gives for DC fast charging. That conversion hardware is large, heavy and needs serious cooling. Site designers choose where it lives:
| Layout | Where conversion happens | What stands at the car | Typical use |
|---|---|---|---|
| All-in-one | Inside the unit itself | One cabinet holding converter, connector, screen and payment | Smaller sites, compact DC, one or two stalls |
| Split system | In a separate power cabinet | A slimmer dispenser post with connector, screen, payment and meter | Larger sites with a row of stalls fed from one cabinet |
Neither layout is a quality grade. It is a packaging decision, made when the site is designed, and both deliver the same DC power to the car.
What Each Box Does
The power cabinet takes the site’s grid connection and does the conversion: rectifiers and DC-DC converters produce the voltage and current the car asks for, and the cabinet’s cooling carries the heat away. Our walkthrough of how DC fast chargers work follows that power path in detail. The dispenser is the part you interact with. It carries the connector and cable, runs the screen and payment, meters the energy for billing, and keeps the connector unpowered until the car is properly connected and the session is authorised — the same session steps described in how EV charging stations work. Think of the cabinet as the engine room and the dispenser as the counter where you are served.
Why Operators Split the Boxes
- Extra stalls cost less. The conversion equipment and grid connection are the expensive part of a site. Buying them once, centrally, and adding comparatively simple dispensers is cheaper than repeating the full machine at every stall.
- Each box goes where it belongs. The cabinet can stand where the power supply enters the site, while the dispensers stand where cars actually park.
- Heat and noise move away from drivers. Cooling fans work in the cabinet, not next to your car door.
- Output can be shared. One cabinet feeding several dispensers can divide its power between the cars plugged in, instead of stranding full capacity behind a single stall. A dual-port charger is the halfway house: two connectors on one self-contained unit.
The All-in-One Alternative
Plenty of sites skip the split. A compact unit such as the EVDANCE EV-RHDC30K-L compact DC fast charger delivers 22 kW of DC from a single cabinet with OCPP 1.6J and an IP54 enclosure, which suits depots, retail car parks and sites whose supply could never feed a high-power cabinet. For larger sites, EVDANCE’s commercial EV charging solutions cover the cabinet-and-dispenser end of the range. EVDANCE is a Shenzhen manufacturer founded in 2011 and exports to 30+ countries.
Frequently Asked Questions
Does a dispenser charge more slowly than an all-in-one charger?
No. The layout does not set the speed; the site’s total conversion capacity, how it is shared between stalls, and your car’s own limit do. Judge a stall by the rating on the post, not by which box holds the converter.
Why are newer fast-charging posts so much slimmer than older ones?
Because the converter and most of the cooling moved out of the post and into a shared cabinet. What is left at the car is the connector, the interface and the metering.
Can one cabinet feed dispensers with different connectors?
Sites can mix connector types across their dispensers. At NEVI-funded corridor sites in the US, each DC port must offer CCS1, and the programme’s rules — 24/7 opening, contactless payment, over 97% average uptime, at least 150 kW per port — apply to the site however it is packaged.
Related Reading
- How Fast Is a DC Fast Charger?
- How to Use a DC Fast Charger: Step by Step
- Is DC Fast Charging Level 3?
- Level 1 vs Level 2 vs DC Fast Charging: A Practical Comparison
