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Dynamic Load Management

When it comes to EV charging, energy management solutions can help to meet the high power demand and ensure there will be enough power available at the site or building complex to supply the electric vehicles.

In layman’s terms, an energy management system uses technology to take the existing electrical infrastructure and its limitations, and distributes the power cleverly so that building electrical loads have priority, and what remains goes to EV charging, so that the infrastructure is never overloaded while EVs are being charged.

Dynamic Load Management (DLM) is just one way of managing energy, and it works by limiting the total power that a group of EV chargers can collectively consume. This limit is not changed in real-time.

How Does DLM Work?

The general logic of DLM is simple: The charging group’s maximum current-flow limit is evenly distributed to charging points that have an active charging transaction. When this status changes for any of the charging points in the group, the available current is recalculated, and new power (current flow) limits are sent to all charging points that have an ongoing charging transaction.

The following events trigger DLM to recalculate the available capacity (based on OCPP statuses – leave this out rather, too technical for average reader)):

1. Every time a charging point in the group starts or stops charging.
2. When a car’s battery becomes fully charged.

DLM is the simplest solution because it’s cloud-based; it doesn’t require a physical connection between the charging points, or any additional hardware to be installed on-site.

Limitations of DLM

Static Charger Group Limit

This group maximum is not adjustable in real-time. Basically, this means that when there is excess power available to the site, it cannot be taken advantage of for charging EVs.

Minimum current

In the backend, there are station-type specific parameters for minimum and maximum charging current. These parameters also affect DLM: It is not possible to set the charging current below the supported minimum. Values lower than the supported minimum are automatically converted to the supported minimum value. For Tier 1 AC chargers its 6 A / phase.

Offline charging points

As DLM is a cloud-based solution, there is no way of controlling the charging points if they are offline. If a charging point loses its internet connection, it will continue charging according to the latest request it accepted before losing its connection. Once the charging point comes back online and this event is registered in the backend, the DLM limits are re-applied.

Contact Elanga For Electric Vehicle Energy Managment Solutions

By making use of our energy management solutions, you can:
• Save costs – Spend little (if anything) on power infrastructure. Avoid expensive peaks.
• Maximize charging power (speed) – Always charge with the most remaining power possible.
• Future-proof the charging site – Future expansion for additional EVs is made more possible.

Get in touch with us today to find out more!