Commercial DC Fast Charger Guide: 60kW vs 120kW vs 240kW
Three power classes serve three different businesses. A 60kW charger fills a car park, a 120kW charger serves a turnover site, a 240kW charger serves a corridor. Picking wrong is expensive twice, once for the hardware and once for the grid.
Power rating is the first number on every DC charger quotation and the easiest one to get wrong. A 60kW unit and a 240kW unit both charge a car. What differs is the business behind them: how long the driver stays, how many vehicles a bay serves in a day, and how much grid capacity you have to pay for.
This guide compares the three power classes that cover most commercial charging sites, using hardware that is actually in production: 60kW for destination charging, 120kW for public sites and fleet depots, and 240kW and above for corridors and 800V platforms. The dwell times assume a 75 to 80 kWh pack, and move with the vehicle.
What Actually Changes Between the Three Classes
Power rating changes three things at once: how fast a vehicle can take energy, how much a site can deliver per bay, and how much the electrical infrastructure costs. The charger is only one of the three. On a 240kW site the transformer, switchgear and civil work can cost more than the charger itself, so choosing a power class is really choosing a grid connection.
| Metric | 60kW class | 120kW class | 240kW and above |
|---|---|---|---|
| Typical dwell time, 10 to 80 percent | 45 to 75 minutes | 25 to 40 minutes | 10 to 20 minutes |
| Output voltage | 50-1000Vdc | 50-1000Vdc | 50-1000Vdc, up to 600A |
| Plug styles supplied | CCS2, CCS1, CHAdeMO, GB/T | CCS2, CCS1, CHAdeMO, GB/T | CCS2, CCS1, CHAdeMO, GB/T; NACS above 350kW |
| Equipment capex | Low to moderate | Moderate | High, and higher with split systems |
| Grid connection | Routine three-phase supply | Dedicated supply or new feeder | Heavy or high voltage connection |
| Best suited to | Retail, hotels, workplace | Public hubs, taxi and fleet depots | Highway corridors, logistics and transit depots |
| OCPP 1.6J and 2.0.1 | Yes | Yes | Yes |
60kW: Destination Charging Where the Driver Stays an Hour
A 60kW charger is a destination product. The driver arrives, tops up while they shop, eat or work, and leaves. The unit does not need to be fast, because the customer is paying for parking and the coffee, not for the charge.
- Output: 40 to 60 kW on the floor-standing XNYZY10, 20 to 40 kW on the wall-mounted XNYZBG01
- Output voltage 200-1000Vdc on the floor-standing unit and 50-1000Vdc on the wall-mounted unit
- 200A per gun on the floor-standing cabinet, with single or dual connectors
- Efficiency of 96 percent or better on the floor-standing unit, air cooled
- IP54 enclosure, suitable for covered outdoor bays
For a retailer or a hotel, that is the entire point. A dwell time of 45 to 75 minutes is not a compromise, it matches how long a shopper stays anyway. The same class fits workplace fleet depots where vans charge during shift changes, and it keeps the electrical upgrade small enough to avoid a utility negotiation that pushes the opening back by months.
120kW: The Class Most Commercial Sites Should Buy
120kW is where dwell time crosses the threshold that makes a public charging stop worth queuing for. A vehicle averaging 75 kWh moves from 20 to 80 percent in roughly half an hour, close to what a driver will tolerate for a coffee on a motorway service area.
- Output: 80 to 240 kW on the XNYZY08, which covers 120 kW in the same cabinet
- Single or dual guns, 250A per gun, 50-1000Vdc output
- Integrated power modules, so one module failure does not take the cabinet offline
- Efficiency of 96 percent or better, IP54 enclosure
- Dynamic sharing on dual gun units: 120 kW to one vehicle, or 60 kW and 60 kW to two
The real argument for 120kW is the grid, not the marketing. A site with a 150 kVA connection can serve a 120kW charger today and a second one later, while a site designed around 60kW chargers often runs out of feeder capacity before it runs out of parking. Sizing up on the electrical side is cheaper than replacing the connection later.
240kW and Above: Corridors, Heavy Fleets and 800V Platforms
Above 240kW the vehicle is usually the constraint rather than the charger. The 800V architectures now shipping accept 200 to 350 kW and beyond, and on a corridor site the charge has to happen in the time it takes to buy lunch and use the toilet.
- 240 kW in one cabinet: the four-gun XNYZY05 carries 160, 200 or 240 kW across four guns at 250A each
- 350 to 600 kW: the XNYZY09 ultra-fast cabinet delivers 250A, 300A or 400A per gun at 200-1000Vdc
- DC to DC for vehicle-to-grid work: the XNYZY09-DCDC accepts 200-950Vdc on the input side and reaches 98.5 percent peak efficiency
- Above 600 kW: the split liquid-cooled terminal and split cabinet separate the power from the hose, up to 2560 kW from one cabinet
- Ultra-fast cabinets ship with CCS2, CCS1 and NACS inlets, which is where the 800V and North American fleets sit
The trade-off is honest. High power costs more per kW of installed equipment, needs a heavier connection, and turns the charger into a capital project with civil works rather than a box on a slab. It pays back only where dwell time is short and demand is high. A bus and truck depot at 1 to 2 MW is a different business from a supermarket car park, and the fleet depot design guide covers that sizing.
Do the Grid Math Before You Choose the Charger
Most failed deployments are not charger failures. A 60kW output needs about 63 kW at the input at 96 percent efficiency, which is roughly 70 kVA at 380V three-phase. Double the output and you roughly double the connection. Doing this arithmetic before the quotation keeps the transformer line item from exceeding the charger line item.
| Power class | Output | Approximate input at 96 percent | Connection to plan for |
|---|---|---|---|
| 60 kW | 60 kW | 63 kW, about 70 kVA | Existing three-phase supply, often enough |
| 120 kW | 120 kW | 125 kW, about 135 kVA | Dedicated supply or a new feeder |
| 240 kW | 240 kW | 250 kW, about 270 kVA | Heavy connection, high voltage in some markets |
| 360 kW and above | 360 kW and above | 375 kW and above | Utility study, often medium voltage |
Treat these as planning figures. Power factor, power factor correction equipment and the local supply voltage all move them, and the connection is the part with a schedule attached. The hub electrical design guide covers how to specify the connection, while dynamic load balancing covers how to run more bays on the connection you already have.
Four Specification Details That Decide the Purchase
Once the power class is settled, four details decide whether the equipment is actually usable on your network.
- OCPP 1.6J or 2.0.1: an open protocol is what lets the charger connect to any charge point management system for billing, authorization and remote management. Every DC unit in the range speaks both, and the OCPP comparison covers which version to specify
- Dynamic load balancing: a dual gun cabinet that delivers 120 kW to one vehicle and 60 kW to each of two raises the number of paid sessions per bay without touching the grid
- Certifications for the target market: CE, TUV, UL, CB and RoHS cover most of the world, and the IEC 61851 and IEC 62196 reports behind them are what a tender checks. The certifications guide sets out which certificate proves what
- Modular power design: a charger built from 30 or 40 kW modules keeps serving at reduced power when one module fails, which on a busy site is the difference between a lost session and a lost day
One more detail is easy to miss, and it is the connector. The 60kW to 240kW cabinets ship with CCS2, CCS1, CHAdeMO and GB/T inlets, while the ultra-fast cabinets above 350 kW add NACS. Specifying mixed cable sets lets one cabinet serve two connector families and allocate power dynamically, which the connector standards comparison covers in detail.
Match the Charger to the Site You Have
The most common buying mistake is sizing for the site you want rather than the site you have. Before picking a power class, write down three things: the median time a driver stays, the number of bays you can physically build, and the kVA your utility will actually grant. Those three answers determine the power class far more reliably than any feature comparison.
If the answer is one hour and an existing three-phase supply, 60kW is the right buy. If it is half an hour and a dedicated supply, 120kW. If it is fifteen minutes on a trunk road, or a fleet returning overnight at 1 MW, you need 240kW and above, probably on a split system. The ROI guide tests the business case against those numbers, and price drivers explains why two chargers of the same rating can differ so widely in price.
What to Ask a Supplier
- Is the quotation for the whole power stack, or only for the cabinet
- Which module brand is fitted, and what the efficiency is at rated load rather than at peak
- Whether the OCPP version is supported by the firmware you will actually be running
- Which certificates cover the exact configuration, and whether the connector certificate matches the cable assembly supplied
- What the failure behaviour is at module level, and what the spare parts lead time is
- Whether the transformer and switchgear can be supplied, or only the charger
Hangtai builds this range from 20 kW wall-mounted units through to 600 kW ultra-fast cabinets and split systems above 1280 kW, all on OCPP 1.6J and 2.0.1 with CE, TUV, UL and CB certification. Site planning, technical drawings and OEM hardware configuration are part of the engineering package, so a 60kW retail pilot and a 1 MW fleet depot are quoted the same way.
Is 60kW fast enough for a commercial charging site?+
For destination charging, yes. 60kW replenishes roughly 200 km in 45 to 75 minutes, which matches how long a driver stays at a supermarket, a hotel or a workplace. It is too slow for a motorway corridor or a public site where drivers will not tolerate a long wait, and it leaves money on the table when a bay could serve twice as many sessions.
Should a public charging hub buy 120kW or 240kW?+
120kW for urban public sites and fleet depots, 240kW for corridor sites with 800V traffic. The deciding factor is not the charger price but the connection: a 120kW site on a dedicated feeder can be extended, while a 240kW site usually needs a utility study and often medium voltage. Buy the power the grid can support and the dwell time the site can fill.
How much grid capacity does a 120kW charger need?+
About 125 kW of input at 96 percent efficiency, roughly 135 kVA at 380V three-phase, before power factor correction and lighting. On a North American 480V three-phase supply the same charger draws around 160 kVA, so specify the local supply voltage rather than assuming the European figure.
Can more chargers be added later if the site starts at 60kW?+
Only if the connection was sized for it. A 60kW charger on a 100 kVA supply leaves little headroom, and adding a second one usually means a new feeder, which is the expensive part. Where growth is likely, size the electrical infrastructure for the final layout and start the hardware lower, or use dynamic load balancing to hold more bays on the connection you already have.