The EV Plaza is a virtual model of a charging area for electric vehicles.
With this model you can:
Estimate energy use (kWh) for the charging plaza
Understand when energy will be needed (load over time)
See how many vehicles can actually be charged
Simulate smart charging control via our EMS to avoid peaks above the contracted power
By using our EMS, charging sessions can be delayed, limited, or resumed later to keep total power within your contracted limits.
Key Parameters of the EV Plaza
These input parameters determine how the EV Plaza behaves in the model:
1. Number of EV Chargers
This is the total number of chargers on the plaza with a default of 2 sockets per charger
Example:
5 chargers × 2 sockets each = 10 EV sockets
The model uses this number to calculate:
Maximum possible simultaneous charging sessions
Socket occupancy and waiting vehicles
2. Total Number of Expected Vehicles per Day
Enter the expected number of vehicles visiting the plaza per day.
This number can be higher than the total number of chargers.
The model uses this to estimate:
How many vehicles can be charged
How many arrive when no socket is available (missed charges)
3. Maximum Power per Socket
Defines the maximum charging power per charger (in kW).
Defaults to 11 kW, but you can set:
22 kW
Or any custom value depending on your hardware setup
This directly impacts:
Total power demand (kW)
Speed at which vehicles are charged and total energy use (kWh)
4. Vehicle Percentages (large, medium, small)
Use these percentages to describe the mix of vehicle types on your plaza. This helps refine the energy demand estimate.
Large vehicles (60–100 kWh)
Heavy passenger cars, electric vans, or trucks with large batteries.Medium vehicles (40–60 kWh)
Standard passenger cars.Small vehicles (20–40 kWh)
Compact cars, small EVs, or electric forklifts.
The model allocates energy demand based on this mix, resulting in a more realistic load profile.
5. Charging Days and Times
Specify on which days and at what times charging is allowed.
This controls:
When vehicles are allowed to start charging
How energy demand is distributed over the week and within each day
It also affects how the EMS can shift charging sessions to avoid peaks.
Understanding the EV Plaza Report
The EV Plaza report shows you how your charging plaza behaves over time and how EMS control impacts energy usage.
The report contains four charts and a summary of total energy values.
Chart 1 – Requested vs. Actual Energy (kWh)
This chart compares:
Yellow line – Requested kWh
The total energy needed to fully meet all vehicle charging demand (without any EMS control).Blue line – Actual kWh used
The energy actually delivered with EMS control active.
Our software may curtail or delay charging to keep total power below your contracted limit.
The difference between yellow and blue represents energy that could not be delivered due to power constraints and control logic.
Chart 2 – Actual Power Consumption (kW)
This chart shows:
The actual power draw (kW) of the EV Plaza over time
How EMS control:
Prevents unwanted peaks
Keeps the total load within contracted power limits
Use this chart to check whether peak loads are acceptable and whether your current contracted power is sufficient.
Charts 3 and 4 – Plaza Usage and Socket Occupancy
These charts provide additional insights into how the charging plaza is used:
Socket occupancy
How many sockets are in use at any given time
How often the plaza is fully occupied
Vehicles arriving without a free socket
The number of vehicles that arrive when no charger is available
An indicator of whether you may need more chargers or different charging windows
These insights help you understand both technical usage and user experience (e.g. how often drivers cannot charge).
Energy Totals in the Report
At the bottom of the report, you’ll find three key totals:
Total (incl. control)
Total kWh actually used with EMS control active
Represents your realistic energy use under controlled, peak-limited charging
Total (excl. control)
Total kWh that would be required if there were no EMS control
Assumes all vehicles can charge whenever they arrive at full power, without peak limits
Total Consumption (missed)
The kWh difference between “excl. control” and “incl. control”
This is the energy not delivered because charging was curtailed or shifted to avoid exceeding the contracted power