Topics in this document:
- Charging area explained
- Charging area example
- Dynamic load balancing example
- List view
- Map view
- Charging infrastructure
To access this section in EV Charge, from the Menu, click Areas.
Charging area explained
A charging area is where a charging infrastructure is located; the beginning of the charging infrastructure is the charging area.
The primary idea/usefulness of creating a charging area is to group chargers linked to the same power source into one charging area. This is because the charging area’s main functionality is the ability to do dynamic load balancing.
Charging area example
Suppose you have a building with limited power capability and a few charging stations in the basement.
You can create one charging area for those charging stations since they are from the same power source. Then, you provide the maximum capability for the power source, and EV Charge will be able to dynamically allocate the load on the currently active chargers based on the limit on the charging area. This is called static dynamic load balancing.
Now, suppose residents live in the building who consume out of the power supply.
You can have a smart meter that feeds live data into EV Charge on total building consumption at the moment, which means EV Charge knows how much power is being pulled by the residents and therefore knows how much power it can give to the active chargers. This is called truly dynamic load balancing.
Dynamic load balancing example
Dynamic load balancing is about the distribution of energy flow between all the electric vehicles charging on the charging area’s connectors.
(Static) Dynamic load balancing example
A charging area has five 50kW chargers and a dedicated power source capable of fully supporting three chargers at maximum power (150kW). Therefore, you set a static limit of 150kW on the charging area because the limit is always known.
(Truly) Dynamic load balancing example
A charging area has five 50kW chargers and a power source capable of 150kW. Also, there are other consumers in the form of an asset consuming out of the power—for example, an apartment.
Therefore, you cannot set the maximum power limit for the chargers to 150kW because other consumers can pull from the power source. Instead, you install a smart meter that tells EV Charge how much power is drawn from other consumers in real-time—for example, 20kW. Then, EV Charge can dynamically calculate the maximum power threshold for the chargers, which will be 150kW - 20kW = 130kW.
Note:With truly dynamic load balancing, the power limit for the charging area can be changed in real-time based on inputs from the smart meter.
Under Areas, there are two sections, namely:
Under the list view, a paginated list of all charging areas is shown in a tabular format.
To generate the areas list in a spreadsheet, click CSV. To print, click Print, and to copy, click Copy.
Note:They are generated, printed, and copied per paginated page.
Four actions/subpages can be performed/viewed under this section, namely:
Under areas, to create an area, click Create new. It has four sections, namely:
Under the info section, provide a name and code.
Note:The code is a unique identifier of an object. It can be used during integration with the EV Charge API.
Additionally, you can provide support contact information for the charging area. It includes a name, phone number, and email address. They are only used for information purposes.
Tip:The support contact information is used to reach out in case something needs to be checked regarding the charging area. For example, if the charging area is a building, the support contact information can be the owner of the building or the janitor.
The charging area can be assigned to an operator. Then, if the operator logs in to their account, they can see the charging area and all the stations and chargers linked to that area.
Furthermore, any number of custom attributes can be added. They store information in key-value pairs and are intended to store additional information for the charging area.
Under this section, provide a physical address for the charging area. The address is crucial; it is where the chargers linked to the charging area will show up on the map both for you in EV Charge and end users in the EV Charge - Mobile App. Hence, configuring this section matters in presenting the chargers to the end users.
Note:Configuring the physical address links to Google Maps; therefore, it populates the longitude and latitude once the address is inputted. However, the populated longitude and latitude values can be updated individually.
Dynamic load balancing
Under this section, dynamic load balancing can be enabled or disabled.
Although static charging profile configuration remains, it is not applied to the charging infrastructure. This means enabling dynamic load balancing and assigning charging profiles are mutually exclusive in EV Charge.
Information:If you are doing dynamic load balancing, create one charging area for one power source.
The following input fields are shown once dynamic load balancing is enabled:
- Electric output limit type
- Electric output limit
- Balancing by asset
- Limit periods
- Priority levels
- Distribution strategy
- Fallout strategy
- Redistribution interval
- Minimum supply
- Maximum supply
- Custom attributes
Electric output limit type
The electric output limit type can either be power or current. The difference is the unit in which the rate limit amounts are configured for every consumption of electric vehicles in a charging area.
The electric output limit type determines whether load balancing limits are specified for power (wattage) or current (amperage).
Power (base unit in Watts) represents the rate of energy transfer.
Current (base unit in Amperes) represents the rate of charged particles flow.
Electric output limit
The electric output limit represents the general electric consumption limit for the charging area. If configured, the chargers in the charging area will be limited and will not exceed the configured value for active sessions.
Note:The electric output limit type determines whether the electric output limit is specified in wattage or amperage.
For example, suppose the electric output limit type is configured as Power, and the value for the electric output limit is 150000W. This means that the value (consumption) for all active charging sessions for that area will not exceed 150kW.
Information:Since it is recommended that if you are doing dynamic load balancing to create one charging area for one power source, the electric output limit in watts can typify the power source output capability. For more information, see Dynamic load balancing example.
Balancing by asset
Balancing by asset indicates whether measured values of related asset are considered for load balancing on the charging area.
The limit periods represent energy flow rate consumption limits of charging electric vehicles in a one-time/scheduled range for that charging area. Limit periods override the energy flow rate output limit of the charging area’s balancing profile for the specific time range.
The priority levels option utilizes the level of the customer’s subscribed plans with the energy flow rate consumption limit in scope of dynamic load balancing.
The distribution strategy indicates how electricity consumption is distributed among the charging consumers (active charging sessions).
Configuring the Distribution strategy to Equal means that if load balancing is being done (has to reduce power output on one of the active chargers), it will divide between all active sessions equally.
Alternatively, suppose the Distribution strategy is configured to First in first charged; in that case, it will give maximum power to whoever started charging first and slowly redistribute it when the person finishes charging.
The fallout strategy only applies when an Equal distribution strategy is chosen. This is where you define the method when not all active charging sessions can be supplied with the minimum electric output. The rule determines which sessions continue to charge.
Configuring the Fallout strategy to First in means that the electric output is provided on the sessions which started earlier.
Alternatively, configuring the Fallout strategy to Round allocation means that the electric output is fairly allocated over time to all the active sessions (consumers)—using the round-robin algorithm.
The redistribution interval in seconds denotes the time range after which the charging limits are redistributed for the charging area.
The minimum supply denotes the minimum power/current to provide for the consumer who is charging—it relates to the electric output limit type of the balancing profile.
Note:The fallout strategy applies if the condition is not fulfilled.
The maximum supply denotes the maximum power/current to provide for the consumer who is charging—it relates to the electric output limit type of the balancing profile.
For example, if you set the value to 10000 per charger, even if a particular charger has a 50kW capacity, the charging area limit will not let it go above 10kW.
Note:The limit on the area is effective for ALL active sessions in that area simultaneously.
Any number of custom attributes can be added. They store information in key-value pairs and are intended to store any additional information.
This section presents the information filled out in the previous three sections and can be reviewed before the charging area is created.
Information:Once the charging area is created, it will initially be empty because no chargers or assets have been linked.
Details area page
Under areas, to see the full details of a charging area, click Details. It contains the following:
- Geographic coordinate system
- Support contact name, phone, and email (if any)
- Dynamic load balancing configurations (if enabled)
- Any added custom attribute
Under areas, to update a charging area, first, click Details; it shows the details of the area. Then to update, click Update.
Note:All information filled out under the create area section can be updated except for the Code.
Under areas, to delete a charging area, click Delete.
Note:Deleting a charging area already used in other parts of EV Charge cannot be done. Every particular reference to the charging area first has to be deleted.
Under the map view, all charging areas are shown on a map. By selecting a specific Area on the map, it shows the driving distance away from the charging area. In addition, it shows the name and location of the charging area, including the chargers and assets linked to the charging area.
Information:If a charging session is in progress, the power the charger’s connector is putting out will be shown.
The charging infrastructure (hierarchy) in EV Charge constitutes the following:
Operator* Area Charging station Charger Connector.
(*) means it is optional.