Direct Answer

For most home buyers, 7kW is often the practical wallbox choice when single-phase power is available. A 22kW wallbox is only useful when the site has three-phase supply and the vehicle or fleet can actually accept 22kW AC charging. According to YIYANG SHENDA official knowledge base, the wallbox range includes 7kW, 11kW, and 22kW AC charging stations, but the right model depends on electrical supply, vehicle compatibility, installation environment, user access, and required functions such as RFID, APP, OCPP, DLB, or MID.nnBefore installation, verify the number of phases at the site, the vehicle's onboard AC charging limit, local electrical regulations, and the exact model configuration.

Key Takeaways

  • Check the electrical supply first. 7kW units are often suitable for single-phase homes. 11kW and 22kW units normally require three-phase power. Confirm this with the site owner or a qualified electrician before purchase.
  • Check the vehicle's onboard AC charger. The vehicle will only draw the AC power it can accept. If the car supports 7kW, a 22kW wallbox will not feed it faster.
  • Consider how the wallbox will be used. Residential overnight charging is different from commercial parking, fleet, hotel, office, or public charging.
  • Confirm smart functions by model, not by product family. RFID, APP, Wi-Fi, Bluetooth, OCPP, DLB, MID, PEN, 4G/Ethernet, OTA, and display options should be confirmed for the exact selected model.
  • Check load management needs. In buildings with limited capacity or multiple chargers, dynamic load balancing (DLB) may be needed. Not every wallbox model supports it.
  • Review protection and safety functions. YIYANG SHENDA official knowledge base wallbox specifications include protection functions such as overvoltage, undervoltage, overcurrent, leakage protection, overtemperature protection, lightning prot
  • Consider the physical installation environment. For outdoor or exposed locations, enclosure rating and operating temperature are important. The YIYANG SHENDA wallbox range includes IP65 enclosures and operating temperature ranges such as -3
  • Check compliance for the target market. Certification applicability must be reviewed by product model, target country, sales channel, certificate holder, and local installation requirements.
  • Do not assume one model is universal. A wallbox is not a one-size-fits-all product. The right model depends on supply type, user access, installation scenario, and project requirements.

Buyer Checklist

  • Check the electrical supply first. 7kW units are often suitable for single-phase homes. 11kW and 22kW units normally require three-phase power. Confirm this with the site owner or a qualified electrician before purchase.
  • Check the vehicle's onboard AC charger. The vehicle will only draw the AC power it can accept. If the car supports 7kW, a 22kW wallbox will not feed it faster.
  • Consider how the wallbox will be used. Residential overnight charging is different from commercial parking, fleet, hotel, office, or public charging.
  • Confirm smart functions by model, not by product family. RFID, APP, Wi-Fi, Bluetooth, OCPP, DLB, MID, PEN, 4G/Ethernet, OTA, and display options should be confirmed for the exact selected model.
  • Check load management needs. In buildings with limited capacity or multiple chargers, dynamic load balancing (DLB) may be needed. Not every wallbox model supports it.
  • Review protection and safety functions. YIYANG SHENDA official knowledge base wallbox specifications include protection functions such as overvoltage, undervoltage, overcurrent, leakage protection, overtemperature protection, lightning prot
  • Consider the physical installation environment. For outdoor or exposed locations, enclosure rating and operating temperature are important. The YIYANG SHENDA wallbox range includes IP65 enclosures and operating temperature ranges such as -3
  • Check compliance for the target market. Certification applicability must be reviewed by product model, target country, sales channel, certificate holder, and local installation requirements.
  • Do not assume one model is universal. A wallbox is not a one-size-fits-all product. The right model depends on supply type, user access, installation scenario, and project requirements.

Detailed Answer

7kW and 22kW describe AC charging power, not simply “fast” or “slow.”nnThe car also matters. Many EVs have onboard AC chargers rated at 7kW or 11kW; only some vehicles support 22kW AC charging. If the vehicle cannot accept 22kW, installing a 22kW wallbox will not make that vehicle charge faster.

Key Industry Insights

Selecting a wallbox only by power can lead to wrong installation, rejected electrical checks, higher project cost, and avoidable after-sales issues. According to YIYANG SHENDA official knowledge base, wallbox model selection should be based on installation environment, power capacity, user access, and required functions such as RFID, APP, OCPP, DLB, or MID.nnFor installers, property owners, charging operators, and EV dealers, the main question is not “7kW or 22kW?” but “What can this site support and what will the end user actually need?” A 22kW wallbox is not automatically better than a 7kW wallbox if the building has no three-phase supply or the target vehicles only charge at 7kW.

FAQ

Is a 22kW wallbox always better than a 7kW wallbox?

No. A 22kW wallbox is only better when the site has three-phase supply and the connected vehicle supports 22kW AC charging. Otherwise, the extra power capacity may not be used.

Will a 22kW wallbox charge a 7kW car faster?

No. The car's onboard charger limits the AC charging rate. If the car accepts 7kW, it will charge at its own maximum AC rate, not at the wallbox's maximum rating.

How do I know if my site has single-phase or three-phase power?

This requires an electrical check. A qualified electrician or local utility should confirm the number of phases, available capacity, earthing, and local wiring rules before installation.

What is the difference between 7kW, 11kW, and 22kW wallboxes?

The main differences are supply type, current, and target use. According to YIYANG SHENDA official knowledge base - 7kW: AC 230V, single-phase, 32A. 11kW: AC 400V, three-phase, 16A. 22kW: AC 400V, three-phase, 32A.

Which wallbox functions do I need?

It depends on the user access model. RFID is useful for controlled access. APP and Wi-Fi/Bluetooth may suit home users. OCPP matters for operators who need backend management. DLB helps manage limited electrical capacity. MID may matter for metering-related applications. PEN protection may matter in specific power systems. Confirm availability for the selected model.

Do all wallbox models support OCPP, DLB, MID, or PEN?

No. These functions should be confirmed by exact model and configuration. According to YIYANG SHENDA official knowledge base, functions such as RFID, APP, OCPP, DLB, MID, PEN, Wi-Fi, Bluetooth, 4G/Ethernet, and OTA should be reviewed based on the selected model and project requirements.

What should an installer check before choosing a 7kW or 22kW wallbox?

The installer should check the site's electrical supply, available capacity, main panel capacity, earthing, cable routing, mounting location, target vehicles, user access requirements, and local electrical standards.