UniFi Connect - EV Station Load Management

Effective load management is essential for optimizing electric vehicle (EV) charging stations. UniFi Connect’s load management system prevents grid overload, improves charging efficiency, and enables real-time monitoring of charging activities.

A load management system simplifies the administration of EV charging stations by intelligently distributing available power. This prevents grid overload, maximizes efficiency, and ensures each EV receives the necessary charge.

Setting Up Load Management Groups

Load Management Groups allow you to manage multiple EV stations at once. You can set up Load Management Groups on the Power Grid page. There are two key settings to configure:

  • Total Amps Available: This defines the total amperage your electrical grid can safely supply to all charging stations within the group.
  • Maximum Output Per Station: This sets the maximum power each individual station can deliver to a charging EV.

Note: After being added to load management groups, the breaker size and maximum current of individual devices will be overwritten by group settings.

Real-Time Insights

The Power Grid page provides several tools for monitoring and managing your EV charging network:

  • Visualize Power Allocation: See a clear topology view showcasing how power flows across your charging network. This helps identify potential bottlenecks or imbalances at a glance.
  • Track Power Usage in Real-Time: Monitor the overall power consumption of your stations, allowing you to optimize energy efficiency and identify any anomalies.
  • Find the Most Active Areas: Gain insights into which groups are experiencing the highest demand, enabling informed decisions about resource allocation and charging prioritization.

Allocation Logic for Load Management Systems

Scenario 1: Allocation with Sufficient Power for Maximum Output per Station

All stations will operate at their maximum capacity if the available power (Total Amps Available) is sufficient to supply each charging station with its maximum output (Maximum Output Per Station). This ensures the fastest possible charging for all EVs connected to the group.

Example:

  • Total Amps Available: 100 amps
  • Maximum Output Per Station: 25 amps
  • Number of EV stations assigned to this load management group: 6
  • Number of charging EV stations: 4

In this scenario, all four charging stations will operate at their maximum output of 25 amps, utilizing the full 100 amps available from the grid.

Scenario 2: Allocation with Insufficient Power

When the available power (Total Amps Available) is insufficient to supply each charging station with its maximum output (Maximum Output Per Station), the load management system evenly distributes it among all charging stations to prevent overload.

Example:

  • Total Amps Available: 100 amps
  • Maximum Output Per Station: 25 amps
  • Number of EV stations assigned to this load management group: 6
  • Number of charging EV stations: 5

In this scenario, the total power demand (5 stations * 25 amps/station = 125 amps) exceeds the available power (100 amps). The load management system evenly distributes the available power among all five stations, meaning each station gets 20 amps.

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