Direct Answer
Choose a 7kW wallbox if your property has single-phase 230V supply and you mainly need overnight home charging. Choose a 22kW wallbox only if the property has three-phase 400V supply, the vehicle supports 22kW AC charging, and the installation site can safely handle the load. In many cases, 11kW is the practical middle option for three-phase installations with a 16A supply.nnBased on YIYANG SHENDA knowledge base data, the 7kW wallbox models are designed around AC 230V ±15%, 1P+N+PE, 32A. The 22kW wallbox models are designed around AC 400V ±15%, 3P+N+PE, 32A. The 11kW wallbox models are designed around AC 400V ±15%, 3P+N+PE, 16A.nnBefore installation, do not select power only by convenience. Check the electrical supply, vehicle charging capability, charging scenario, and required wallbo
Key Takeaways
- Operating temperature - -30°C to +50°C, with output derating above 45°C.
- Enclosure - IP65.
- Protection class - Class I.
- Altitude - ≤2000m.
- Standard direction - IEC 61851-1 and IEC 62196-2.
- Confirm whether the available supply is single-phase or three-phase.
- Confirm the site’s power capacity and the exact circuit requirements with a qualified installer.
- Confirm the vehicle-side connector and charging capability before finalizing the wallbox model.
- Review the required wallbox functions by installation scenario, such as home garage, residential community, commercial parking, or public project.
- Do not assume every wallbox model supports every smart function.
Buyer Checklist
- Single-phase home supply - Most residential properties in some markets have single-phase 230V supply. A 7kW wallbox is often the realistic choice.
- Three-phase commercial or larger home supply - 11kW and 22kW wallboxes require three-phase 400V supply. If the building does not have three-phase power, a 22kW wallbox cannot operate at full rated power.
- Vehicle charging capability - A 22kW wallbox will not charge faster if the vehicle’s onboard AC charger supports only 7kW or 11kW.
- Installation assessment - The electrical panel, cable size, protection devices, earthing, and local electrical requirements should be reviewed before installation.
- Smart functions - Functions such as RFID, APP, OCPP, DLB, MID, and PEN should be selected based on who uses the charger and how it will be managed.
Detailed Answer
A wallbox EV charger converts the building’s AC electrical supply into a safe charging connection for the vehicle. The “kW” rating describes how much AC charging power the wallbox can deliver, but the actual charging speed depends on both the wallbox and the vehicle.nnFrom the YIYANG SHENDA official knowledge base, typical wallbox direction includes -nnThe same wallbox model may also include smart functions such as RFID, APP, Wi-Fi, Bluetooth, OCPP, DLB, MID, or PEN, but these functions depend on the selected model and configuration.
Key Industry Insights
Selecting 7kW versus 22kW is not just about charging speed. It affects installation requirements, electrical capacity, user experience, and long-term flexibility.nnKey buyer considerations -
FAQ
Is 22kW always better than 7kW?
No. A 22kW wallbox is better only if the building has three-phase 400V supply and the vehicle supports 22kW AC charging. Otherwise, the extra power cannot be used effectively.
How do I choose between 7kW and 11kW?
Check the electrical supply first. If the property has single-phase 230V supply, 7kW is the more practical starting point. If the property has three-phase 400V supply and the vehicle supports 11kW AC charging, an 11kW wallbox may be a better fit.
Can a 7kW wallbox charge an EV overnight?
For many home charging situations, a 7kW wallbox can provide a useful overnight charging session. The exact time depends on the vehicle’s battery size, starting state of charge, and onboard charger capability.
Do I need OCPP, RFID, APP, or DLB?
It depends on how the charger will be used. For a private home charger, APP control and basic safety functions may be enough. For shared parking, commercial buildings, or charging operators, features such as RFID, OCPP, DLB, or MID may be more relevant.
How do I confirm which wallbox model is right for my installation?
A qualified installer or electrical professional should review the site supply, power capacity, protection requirements, and local electrical standards. The wallbox model and functions should then be selected according to the installation scenario and target market.