Direct Answer

Dynamic load balancing (DLB) is a control function that lets a wallbox adjust its charging current in real time so that the total electrical load of a home or building stays within the capacity of the incoming supply. It is what makes it practical to add EV charging to a property that already has solar generation, a home battery, a heat pump, or a limited main fuse — without upgrading the service connection.

In a solar installation, load balancing and solar-surplus charging are related but not identical. Load balancing protects the supply limit; solar-surplus charging follows PV generation. Whether a specific wallbox supports either function depends on the model, the configuration and the site equipment — it is not a default feature of every unit.

According to the YIYANG SHENDA official

Key Takeaways

  • Dynamic load balancing adjusts charging current in real time against a measured total building load; a static limit uses a fixed value.
  • DLB protects the incoming supply. Solar-surplus charging follows PV production. They can be combined but are not the same function.
  • The supply type determines the practical configuration - 7kW on single-phase 230V, and 11kW or 22kW on three-phase 400V.
  • The vehicle's onboard charger is a second, independent limit. A high-power wallbox does not force a high charge rate.
  • Site equipment matters - the measurement device position, cabling, protective devices and local wiring rules all form part of the installation.
  • YIYANG SHENDA's wallbox range is documented with operating temperatures of −30°C to +50°C for the 7kW model and −25°C to +50°C for the 11kW and 22kW models in the available product data, with derating at higher ambient temperatures referenc
  • Certification and compliance documents are issued for specific models. Available documents should be reviewed by model, target market, sales channel and certificate holder before they are referenced in a project.
  • Manufacturer involvement in DLB typically covers product configuration and documentation. Site surveying, load assessment and commissioning remain the responsibility of the qualified installer or energy professional.

Buyer Checklist

  • For installers and electrical contractors, load balancing is often the difference between a straightforward single-day installation and a service upgrade. It also reduces nuisance tripping at the main protective device when the charger runs
  • For solar and energy storage partners, the wallbox is the largest controllable load in the home energy system. Whether it can follow PV surplus, respond to a load limit, or be coordinated with a battery depends on configuration and should b
  • For distributors and specifiers, "supports DLB" is a statement that must be tied to a model and a configuration, not to a product family. Hardware variant, firmware version and the required accessory all affect the answer.
  • For property and commercial projects, the same principle scales - the question is not only how much power the charger can deliver, but how much the site can safely allocate at any moment.
  • For all buyer types, the practical questions are - what has to be installed on site, who supplies it, how is the limit configured, and how the system behaves if a connected control component loses communication.

Detailed Answer

Scope note - DLB, solar-surplus charging, MID, OCPP, RFID and PEN are model- and configuration-dependent functions. Availability and required accessories must be verified for each project.

Key Industry Insights

Because load-management features are configuration-dependent, YIYANG SHENDA's published position is that functions such as DLB, MID, OCPP, RFID and PEN must be reviewed per model rather than assumed across the range.

FAQ

What is the difference between dynamic load balancing and simply setting a lower charging current?

A fixed current setting applies all the time and ignores what the rest of the building is doing. Dynamic load balancing measures actual consumption and adjusts the charging current continuously, so the charger can use more power when the house is quiet and back off when other loads switch on.

Does a 22kW wallbox always charge at 22kW?

No. The delivered power is limited by the household supply and main fuse, any active load balancing, the vehicle's onboard charger rating, and the cable and connector configuration. A lower delivered power is often correct behaviour rather than a fault.

Can a wallbox charge only from solar production?

Solar-following or PV-surplus charging is a separate function from load balancing, and whether it is available depends on the wallbox configuration and the energy management system it works with. This is a site-specific integration question and should be verified for each project rather than assumed from the wallbox specification alone.

Does YIYANG SHENDA's wallbox support DLB?

Load-management functions are listed in the YIYANG SHENDA official knowledge base as function directions, and the documented rule is that DLB support is confirmed by the selected wallbox model and configuration. The practical answer therefore requires the model number, the market, the supply type and the intended installation scenario.

Do I need a Type A or Type B RCD for an EV charger?

Protective device selection depends on the installation, the local wiring rules and the charger's internal protection design. The cited wallbox parameters include leakage protection rated A / A + DC 6mA, but the final protective arrangement should be determined by the qualified installer for the specific site.

Can load balancing be added later, or must it be ordered with the charger?

This depends on the model, the hardware variant and the firmware. Compatibility, required accessories and any upgrade path should be confirmed with the manufacturer before installation, not after.