Direct Answer

For most home installations, a 7kW wallbox charger is the more practical and cost-effective starting point, especially when the home has a single-phase supply and installation savings matter. A 22kW wallbox charges faster, but it normally requires a three-phase 400V power supply, more grid capacity, and usually higher installation and cabling costs. The right choice depends on the available power supply, the vehicle’s onboard charger, local electrical rules, and the actual usage pattern — not on the headline power rating alone.

Key Takeaways

  • Match the charger to the power supply. 7kW works with single-phase 230V; 22kW normally requires three-phase 400V.
  • Match the charger to the vehicle. Charging speed is limited by the vehicle’s onboard AC charger. A 22kW wallbox cannot charge a car faster than the car accepts.
  • Compare total cost. Installation cost, grid capacity, and future flexibility should be considered together with the unit price.
  • Check local electrical rules. According to YIYANG SHENDA official knowledge base guidance, wallbox model selection should be based on installation environment, power supply, protection requirements and local electrical standards.
  • Confirm smart functions by model. Functions such as RFID, APP control, Wi-Fi, Bluetooth, OCPP, dynamic load balancing (DLB), MID metering, or PEN protection may be useful depending on the home scenario. These functions should be confirmed o
  • Plan for future needs carefully. Choosing 11kW or 22kW to prepare for a future EV is reasonable only if the home supply can support it.

Buyer Checklist

  • Electrical panel capacity review
  • Cabling and breaker upgrades
  • Possible service connection changes
  • Labor and site-specific work

Detailed Answer

Based on YIYANG SHENDA official product documentation -nnIn other words, the model family is designed around the supply type - single-phase for 7kW, three-phase for 11kW and 22kW.

Key Industry Insights

Buyers should know that the purchase price of the wallbox is only part of the total cost. Installation can include -nnFor a home with a single-phase connection, upgrading to three-phase to run a 22kW wallbox can be significantly more expensive than simply installing a 7kW unit. In many cases, a 7kW charger over an overnight charging window is enough for daily driving.nnFor homes with an existing three-phase supply, a 22kW wallbox may make sense if the vehicle supports 22kW AC charging and the property has enough spare capacity. Otherwise, an 11kW unit can be a balanced middle option.

FAQ

Can a 22kW wallbox run on a single-phase home supply?

The 22kW models are designed for three-phase 400V supply, such as the 3P+N+PE, 32A configuration in YIYANG SHENDA’s SD-E900/E999 series. Running them on a single-phase supply without proper electrical review is not appropriate. Always check the supply type and local electrical rules first.

Is 7kW enough for home charging?

For many home users, yes. A 7kW wallbox can add a meaningful charging range overnight. The exact result depends on the vehicle, battery size, and daily driving distance. If the car only supports single-phase AC charging, 7kW is often the practical limit anyway.

Is a 22kW wallbox worth the extra cost?

Only if the home has three-phase power, the vehicle accepts 22kW AC, and the faster charge time is genuinely needed. Otherwise, the additional equipment and installation cost may not pay back.

What role does load balancing play at home?

Dynamic load balancing (DLB) can help a wallbox share limited household capacity, which is useful when the home supply is tight. Whether DLB is available must be confirmed on the selected model and configuration.

Do all wallbox models support the same protection functions?

No. Protection features can vary by model and configuration. According to YIYANG SHENDA official knowledge base data, functions should be reviewed based on installation scenario, power capacity, user access, target market and required functions before confirmation.