Do you want to increase occupancy and revenues at your sites? You can use dynamic load management to optimize the delivery of electric power across your vehicle fleet, while ensuring the safety of your electrical infrastructure.
This guided tour will help you configure your assets to start using dynamic load management.
When a charging session starts, SAP E-Mobility verifies that dynamic load management is enabled for the charging station. If this is not the case, the maximum power of the connector used is subtracted from the site area's maximum power to prevent any overload, and the connector is prioritized for charging.
Low energy delivered
High nominal battery capacity
Low charging speed
The power available for charging is then restricted to the values entered in the Settings app, and according to the charging context of the site area. See Configuring Dynamic Load Management.
When the parameters mentioned here are retrieved, a charging plan is created for charging stations based on the maximum power and the available power for the site areas.
During a charging session, the charging plan is constantly recalculated to include changes to the available power, caused by other charging sessions that have started or ended, or variations to a connector's power.
You can launch charging plans on demand. When a charging session ends, its charging plans are deleted.
Your charging stations support smart charging. If in doubt, contact the charging station vendors.
Here's what you'll learn in this guided tour:
How to configure your charging stations and site areas to benefit from dynamic load management.
How to view charging plans during charging.
How to fine-tune power and charging plan settings.
To configure your site areas for dynamic load management, open the Manage Locations app.
Choose the tab Site Areas.
Select a site area for which you want to enable dynamic load management.
Choose Edit.
Confirm that the values you've entered in SAP E-Mobility for the Number of Phases, the Maximum Power, and the Voltage correspond to the actual electrical installation.
If in doubt, ask your electricity provider or your electrical engineers.
Correct the values if necessary.
Make sure that the option Dynamic load management is chosen.
If you want to define a hierarchical structure between the site areas, you can select a Parent Site Area. Make sure that the chosen parent shares the same values for the Site, Number of Phases, Voltage, and Enable dynamic load management with the site area.
Review the list of charging stations assigned to your site areas.
If you find that charging stations are missing, add them to your site areas.
Choose this icon to access the charging station list.
Select charging stations from the list.
Make sure that the Number of Phases and Voltage for the charging stations you choose are identical to the site area.
Then, choose OK.
Select Add Charging Stations.
The assigned charging stations have dynamic load management enabled by default if they support it, unless you've manually configured them differently. When charging stations are excluded from dynamic load management, the maximum power of the connectors that are charging is subtracted from the site area's maximum power to prevent any overload. The connectors of the charging stations that are excluded from dynamic load management are prioritized for charging.
Choose Save.
Go back to the home page.
You can manually exclude a charging station from the site area's dynamic load management algorithm if you notice a problem.
We'll see later how to fine-tune the settings to avoid known issues.
You can also view charging plans when a charging session is in progress.
To continue, open the Manage Charging Stations app.
Choose a charging station to see its configuration.
Choose Load Management.
You can see here if a charging station uses dynamic load management.
If you choose the option Exclude this charging station from dynamic load management, the power reserved for charging a vehicle at the site area is the charging station connector's maximum power.
The option is already selected if charging stations don't support dynamic load management.
During a charging session, you can access the charging plan here.
When the charging session stops, the charging plan is deleted.
Go back to the home page.
SAP E-Mobility has defined default dynamic load management settings to optimize charging.
If your charging stations require a different configuration, you can change the values.
To do so, open the Settings app.
Choose Dynamic Load Management.
During a charging session, the charging plan is constantly recalculated to include changes to the available power, caused by other charging sessions that have started or ended, or variations to a connector's power.
By default, a charging plan is made up of 20 periods of 15 minutes. Sending many periods at once ensures that charging continues even if the connection with SAP E-Mobility is lost.
However, some charging stations reboot when they receive too many periods at once.
To avoid this issue occurring, you can limit the number of periods that are sent to the charging stations.
In this section, you can adjust the current and the power values.
By default, the minimum current for each phase is 6 A to avoid charging inactivity.
You can retain this value or increase it.
Vehicles with similar electrical properties are prioritized at the beginning of their charging session, when the energy delivered is low.
However, at the beginning of the charging process, some vehicles request a high amount of power, before their consumption decreases and stabilizes.
By default, when charging starts, the maximum power of the connector is subtracted from the site area's available power.
On the user interface, this corresponds to a blank (null) value in the field Initial Maximum Current for Each Phase.
You can limit the initial current flow to allow a better distribution of the available power amongst your vehicle fleet.
To do so, enter a number that is equal to or greater than the Minimum Current for Each Phase.
The power delivered to some vehicles can be significantly lower than the connector's maximum power.
The default option Restrict the available power of each connector to the power currently delivered allows the unused power to be reserved for charging other vehicles in the same site area.
If you need to reserve the maximum power of your connectors for charging, you can deselect this option. No power delivery adaptation will be performed within your fleet.
To enable charging to adapt to the site area's context and to prevent charging issues occurring when the initial power delivered is too low, allow the connector's available power to increase based on the last power value received.
By default, AC and DC connector percentages are set to 20%. You can adjust these values later based on your findings.
The dynamic load management algorithm is more efficient if the battery's nominal capacity and charging speed are known. To enable the retrieval of these values, enter the Vehicle on the badges.
You can leave the guided tour.