Dynamic Load Balancing for Smart EV Charging

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As the world makes the transition to electric mobility, a growing number of individuals are recognizing the advantages of electric vehicles and the convenience of charging them while parked. In fact, over half of electric vehicle owners prefer private EV chargers. However, amid the cost-effectiveness and convenience, users must also factor in the actual grid load and energy management. Common household EV chargers typically have a power rating ranging from 7.4 kW to 22 kW, whereas other home appliances like ovens operate at around 2 kW and microwaves at just 1 kW. This underscores the fact that EV chargers are high-energy devices and, if not managed properly, can exert a significant burden on the power grid. In this context, Dynamic Load Balancing (DLB) emerges as the perfect solution.


How Does Dynamic Load Balancing Operate?

Dynamic Load Balancing for EV charging represents a cutting-edge, intelligent feature designed to continuously monitor energy consumption changes and allocate available capacity to various devices. Its widespread implementation is particularly evident in residential settings, where a Dynamic Load Balancing EV charger can dynamically regulate the charging power based on the available capacity within the household circuit. For instance, when household appliances like washing machines, dryers, microwaves, and one or more chargers are operating concurrently, DLB has the capability to reduce or temporarily pause the car’s charging power to free up grid capacity for other appliances. Once these devices cease their operation, the charger can either resume or increase the charging power.

In contrast to DLB, Static Load Balancing (SLB) relies on a fixed and unchanging power distribution approach, failing to account for variations in power consumption by non-electric vehicles or multiple electric vehicles. To put it differently, the SLB charger consistently operates at its rated power, irrespective of the power consumption of other household appliances or chargers. This rigidity potentially gives rise to grid overloads when other loads increase, resulting in system shutdowns and safety risks.

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How does Dynamic Load Balancing benefit you?

Prevent Grid Overloads: When multiple chargers operate simultaneously or when numerous household appliances are in use, such as air conditioning, washing machines, and microwaves, DLB automatically fine-tunes the charging power based on the grid’s load to avert overloads and potential incidents like circuit breakers tripping.

Economize on Costs: Installing DLB chargers ensures the utilization of maximum charging power on the existing grid without concerns of grid overloads, resulting in substantial savings on expenses linked to grid upgrades. Additionally, as chargers typically have significantly higher power ratings than most household appliances, DLB allows them to autonomously augment charging power during off-peak hours, leading to cost savings on electricity.

Flexible Charging: With dynamic load balancing, users can make charging decisions for their electric vehicles without apprehension about overloading, even during peak electricity demand. For those with two or more electric vehicles, the ability to manage chargers and prioritize power allocation through an app permits some vehicles to charge more rapidly than others.

Energy Management: Dynamic Load Balancing EV Chargers assist users in monitoring their home’s energy consumption, empowering them to monitor usage and modify electric vehicle charging currents according to their personal preferences and requirements.

How to Determine the Need for Dynamic Load Balancing?

Assessing whether Dynamic Load Balancing (DLB) is necessary can be accomplished by comparing the grid load and the cumulative power consumption of household appliances using the following methods:

  1. Consult a professional electrician to measure the load accurately.
  2. Conduct a rough estimation on your own: Inspect the nameplates of household appliances and calculate the total load, while also reaching out to the utility company to confirm the total load capacity of your residence. By subtracting the load from household appliances from the total load capacity, you can determine the remaining current capacity.

Once you’ve established the available capacity, you can make an informed decision on whether DLB functionality is required. If introducing the power demands of an electric vehicle charger might lead to grid overloads, it is advisable to consider implementing DLB.


EVB’s Innovative Dynamic Load Balancing Solutions

After a comprehensive analysis of user needs, EVB has designed a range of EV chargers with Dynamic Load Balancing, offering users a versatile charging experience. Let’s delve into the details of EVB’s DLB solutions, primarily consisting of two modes:

Standard DLB Mode: In this mode, DLB constantly monitors the circuit’s available load and adjusts the charging power to prevent system overload. Users have the option to activate the DLB Extreme Mode for enhanced power distribution optimization during peak usage. Under this mode, if the charging current drops below 6 amperes, the charger will pause its operation, automatically restarting when the available current reaches 10 amperes.

PV DLB Mode: Tailored for households with grid-connected photovoltaic systems, this mode builds upon the functionality of the Standard DLB Mode and offers three additional modes to cater to users’ personalized energy requirements:

A. Pure PV Mode: The charger exclusively utilizes electricity generated by the photovoltaic system, resulting in savings on electricity costs.

B. Hybrid Mode: When the photovoltaic system generates sufficient electricity to support the load, the charger operates solely on solar energy. However, if the photovoltaic system is producing inadequate power, grid electricity supplements the load. Users can preset a maximum current using the app to control grid power input.

C. Full Speed Mode: Under this mode, the charger operates at maximum power.

*Based on these three modes, users can further activate the Automatic Night Full Speed Mode. Users can define a nighttime period based on their energy consumption habits and local time zones. During this period, the charger rapidly charges using grid electricity to prevent non-charging when the photovoltaic system is inactive at night.

Dynamic Load Balancing stands out as a potent feature among the myriad intelligent charging options for electric vehicle chargers, ensuring efficient and safe energy utilization while delivering savings in both initial and ongoing costs. To explore the ideal DLB-enabled smart charging solutions, please visit: https://www.evb.com/.

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