What is dynamic load balancing?

Dynamic load balancing continuously adjusts EV charging to the power available at a home, depot or commercial site. When other equipment uses more electricity, the charger receives less. When demand falls, charging can increase again within the installation and vehicle limits.

The purpose is to avoid exceeding a defined connection or circuit limit while using more of the capacity that is already available. It may reduce or delay a grid upgrade, but it does not replace proper electrical design or protection.

How does an EV charger know the available load?

A meter, current transformer or building-management system measures electricity at a suitable point in the installation. A local controller, charger or energy-management system compares that reading with the configured limit and calculates the EV allowance.

The charger then applies a current limit. At a multi-charger site, the available EV capacity must also be divided between connected vehicles. The control loop, communication path, measurement accuracy and fallback behaviour all need to suit the installation.

Static and dynamic load balancing

Static load balancing shares a fixed amount of power between chargers. It does not increase the EV allowance when the rest of the building is quiet.

Dynamic load balancing includes other site demand. A 100 A connection might make more current available to EVs when kitchens, heating or machinery use less, then reduce charging when those loads rise. The configured safety margin remains part of the design.

Do you need dynamic load balancing?

It is most useful when the charger could otherwise compete with major loads, when several chargers share a constrained connection, or when future expansion is expected. A simple installation with ample dedicated capacity may not need it.

For a home, the priority is normally preventing the main connection from being overloaded. At a workplace or depot, the system may also share capacity fairly, protect production loads or prioritise vehicles that leave first. Read how fleets and commercial sites manage those priorities.

Does load balancing need a smart meter?

Not necessarily. Many systems use a separate sensor or compatible site meter because it provides the local measurement required by the controller. A utility smart meter may be used by an energy supplier for tariffs or services, but that is a different role.

 

What happens if communication fails?

The design should define a safe fallback current or pause charging if reliable load data is unavailable. For site protection, local control can avoid depending on a distant cloud connection. A cloud CPMS may still set wider schedules and priorities, while the local layer enforces the immediate electrical ceiling.

How is it different from smart charging and V2G?

Load balancing is one smart-charging function focused on limited capacity. Smart charging can also follow prices, solar or departure times. V2G adds energy export from the vehicle. Our comparison of smart charging, load balancing and V2G separates the requirements.

How amina fits

Current product information for amina M/M2 lists local load balancing, Modbus RTU and an integrated energy meter. amina supplies the charging hardware and works with CPMS, energy and installation partners. The meter location, controller, limits and tested integration still need to be defined for each site.