CTEK NANOGRID home User manual
USER
MANUAL
MULTILINGUAL
MANUAL
NANOGRID™
2Configuration instructions CTEK E-Mobility AB
Contents
INTRODUCTION.......................................................................................................................................2
Three levels of NANOGRID™.........................................................................................................2
Installation procedure.....................................................................................................................3
NANOGRID™ local/grid central configuration.............................................................................3
The NANOGRID™ configuration file............................................................................................4
Dierent node types........................................................................................................................4
To do before you configure a NANOGRIDTM installation......................................................5
To install the nanogrid.ini configuration file............................................................................5
To do a client (station) configuration........................................................................................6
To install the nanogrid.ini configuration file through the CHARGE PORTAL web
interface ...............................................................................................................................................7
To install the nanogrid.ini configuration from a 3rd party CSMS (backend)..............7
Advanced configuration .................................................................................................................7
Monitoring/Verification.....................................................................................................................10
To monitor and verify the NANOGRID™ installation through the NANOGRID™
controller web interface ...............................................................................................................10
Software description........................................................................................................................... 11
Firmware upgrade of station nodes.......................................................................................... 11
Automatic configuration of station nodes and controller ................................................ 11
Oine and fallback behavior....................................................................................................... 11
The NANOGRID™ schedulers .....................................................................................................12
Appendix .................................................................................................................................................14
Glossary of terms/abbreviations/acronyms........................................................................14
Complete installation examples................................................................................................ 15
INTRODUCTION
The load balancing protects your power grid from overload. The load balancing is called NANOGRID™ and is available in
three dierent levels.
This manual focuses on CHARGESTORM CONNECTED 2 NANOGRID™ configuration.
To install the home load balancing kit, follow the attached manual in the kit.
Three levels of NANOGRID™
The level of NANOGRID™ is given by the premises and demands of function. Select correct level for your needs.
NANOGRID™ home
NANOGRID™ home is used at villas, summerhouses, guest houses etcetera. NANOGRID™ home has support for a single
charging station.
16A
20A
Sub central
Main fuse 20A
Cat5 cable (Modbus)
An additional
energy meter
is mounted
on incoming
power in the
distribution
panel
Examples of features that
draw electricity in the house
· Oven
· Dryer
·Stove
· Ventilation
· Sauna
Example
3-phase
16A (11kw)
The power of the charger will automatically be set at no risk of overload.
NANOGRID™ local
NANOGRID™ local is used for tenants, companies, parking spaces etcetera. It is suitable for installations for up to 12
charge points. For local NANOGRID™ license is needed. For dual outlet article number 810-00048, for single outlet
article number 901-00018.
Master
When many electric vehicles charge at the same time, load balancing can be necessary to prevent overload. If there is
an overload, the system automatically adjusts the power of the charging stations or stops them completely.
Configuration instructions 3
CTEK E-Mobility AB
EN
NANOGRID™ grid central
NANOGRID™ grid central is used for parking lots, real estates, industries, etcetera. The NANOGRID™ grid central is
available in two versions:
• CGC100: Applicable for installations for up to 70 charge points.
• CGC500: Applicable for installations for up to 500 charge points.
Elevator Lighting
CTEK GRID
CENTRAL
The grid central is a separate compact device cabinet that contains a charge control unit, an energy meter and a
transformer measurement equipment. The grid central manages the charging stations and the external loads such as
lighting, ventilation, elevator.
Deployment of the NANOGRID™
INTERNET
Mains
Grid Central
(CGC500™)
Ethernet Switch
Distribution Panel
*Phase rotation
***
To install the power and network cables to the stations, refer to the CHARGESTORM CONNECTED 2 USER MANUAL. The
manual is available at https://chargestorm.se/en/manuals/
NOTE: Manuals are also available for older stations, such as the CHARGESTORM CONNECTED 1. Make sure that you
refer to the correct installation manual when you install the power supply and the network cables.
For information about IT-Net installations, refer to "To connect stations used in IT-Net" on page 9.
Installation procedure
NOTE: It is possible to install chargers and at a later step configure and enable a site.
NOTE: To create the correct configuration file, make sure that you have all information about the installation available.
Example of the typical installation procedure:
1. Do a plan of the phase rotation of the chargers.
2. Write down the amperage of the protective fuses.
3. Install the chargers according to the phase rotation plan.
4. Configure the NANOGRID™ master with the NANOGRID™ file.
5. Make sure that the installation is correctly done.
To plan the phase rotation
The phase rotation creates an even load on a larger installation site. Many EVs use a 1-phase for charging and thus only
draw current on the L1 in the EVSE outlet. If the phase rotation is not applied, the L1 fuse can easily overload and the fuse
blow.
1. Divide all the chargers into three groups; RST, STR and TRS.
2. Install all the chargers in each group with the phase rotation that follows:
a. RST group with L1, L2, L3
b. STR group with L2, L3, L1
c. TRS group with L3, L1, L2
3. Make sure that you save all the chargebox identities and what group they belong to before the configuration.
Example 20 chargers:
• RST group: 1, 4, 7, 10, 13, 16, 19
• STR group: 2, 5, 8, 11, 14, 17, 20
• TRS group: 3, 6, 9, 12, 15, 18
NANOGRID™ local/grid central configuration
The NANOGRID™installation must be configured correctly for the load balancing to do the correct decisions and
actions. The most important configuration is the configuration of the NANOGRID™ controller unit. The NANOGRID™
controller unit has two variants:
• CTEK GRID CENTRAL (CGC): A controller unit that is dedicated to the task of load balancing. The control unit is
usually installed in a separate cabinet.
• Master Controller Unit (Master): A controller unit that also operates as a regular charging station. The external
surface is typically the same as a controlled charging station.
NOTE: For more information about advanced and optional configuration, refer to "Advanced configuration" on page
7.
The information in this section is applicable to both CGC and Master.
4Configuration instructions CTEK E-Mobility AB
The NANOGRID™ configuration file
The NANOGRID™ configuration file is placed on the NANOGRID™ controller.
The NANOGRID™ configuration file defines:
• Nodes to be load balanced.
• How each node is electrically connected to the grid.
• The load balancing schedule.
• Fallback current.
• Physical fuses.
• External meters.
The configuration file is named nanogrid.ini and it contains:
• General NANOGRID™ configuration.
• Node configuration.
The nanogrid.ini file must be edited or created with a text editor that understands and respects UNIX-style line-endings,
for example Notepad++.
General configuration includes, but is not limited to, configuration of the NANOGRID™ scheduler. Refer to "To select load
balancing scheduler" on page 7.
Dierent node types
The two most common node types are:
• Fuse: A distribution board. The fuse node cannot be controlled but the fuse node limits the quantity of the available
electrical capacity.
• Station: A NANOGRID™ compliant charging station. The station node can be directly controlled by the NANOGRID™
controller.
Distribution boards (fuse) node type
A distribution board is described by one of the fuse types. The basic format of a fuse node is:
[GROUP-1]
type=fuse
rating=32
parent=MAINPANEL
Definitions:
[GROUP-1] The identity of the fuse node. It must be unique for each node in the configuration file.
type=fuse Defines that this is a fuse type node.
rating=32 The upper limit of the node that must not be exceeded when the charging capacity to
station nodes is set.
This is typically the rating of the fuse, in this case 32 A. The fuse is assumed to have 3
phases, all connected up- and downstream.
parent=MAINPANEL Defines to which distribution board this node is connected to upstream. In this case, a
distribution board with the identity MAINPANEL. This means that this node is electrically
downstream from the node MAINPANEL.
To set this fuse node as the grid connection point, the parent value should be the same as
the identity value. Refer to the note and example below.
The grid connection point has itself as a parent in the configuration.
I
NOTE: Each configuration file gives a tree graph of the electrical connections that are applicable for the local
NANOGRID™ installation. This means that each node has a direct parent except for one node which is the grid
connection point. Refer to the example below:
[MAINPANEL]
type=fuse
rating=40
parent=MAINPANEL
Station node type
The basic format of a station node is:
[NG-STATION-1]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
Definitions:
[NG-STATION-1] The identity of the station node. It has to be unique for each node in the configuration file. It
also has to correspond with the chargebox identity parameter set on the charging station.
For more information, refer to the CHARGESTORM CONNECTED 2 USER MANUAL.
type=station Defines that this is a station type node.
parent=MAINPANEL Defines the distribution board the station is connected to. In this case, a distribution board
with the identity MAINPANEL.
This means that the station is electrically downstream from the node MAINPANEL.
outlet/size=2 Defines that the station is equipped with 2 EVSEs (“outlets”).
outlet/1/fallback_
current=8
Integer value that states what current capacity (in Ampere) must be assigned to an EV
connected to the first EVSE in case the charging station loses the connection with the
NANOGRID™ controller.
Accepted values are 0 or >=6 (6 A or larger).
A value of 0 (zero) means that charging will not be allowed if the station loses contact with
the NANOGRID™ controller.
The fallback current is 8 A in the example.
outlet/2/fallback_
current=8
Fallback current for the second EVSE. Refer to the description above.
Configuration instructions 5
CTEK E-Mobility AB
EN
PhaseRotation=RST States how the charging station is connected to the grid supply.
A combination of:
• R (Grid L1)
• S (Grid L2)
• T (Grid L3)
• x (Unconnected)
In the example, the station is connected to grid phases L1, L2, and L3. In that order (not
rotated).
NOTE: A 1-phase, single-EVSE station could have a PhaseRotation of either Rxx, Txx or Sxx.
IMPORTANT: Nodes of type station cannot be set as parents, as they can only be end nodes.
IMPORTANT: The outlet/x/fallback_current parameter will default to 0 A (charging is not possible) by the NANOGRID™
controller if it is missing.
NOTE: Make sure that the combined fallback currents do not assign too much in the event of a local NANOGRID™
controller or network failure.
NOTE: For more information about the fallback and oine behavior, refer to "Oine and fallback behavior" on page
11.
To do before you configure a NANOGRIDTM installation
1. Make sure that the NANOGRID™ compliant units are in operation.
2. Make sure that the units have applicable licenses.
3. Make sure that the local electrical grid conditions are known.
4. Make sure that the electrical installation is completed and will not be changed in the near future.
5. Make sure that the units contain a correct LAN configuration.
6. Make sure that applicable firmware is in operation. Version R3.11.14 or later is recommended.
To install the nanogrid.ini configuration file
• Install the nanogrid.ini file via the CTEK CHARGE PORTAL web interface, a third party CSMS backend, or upload the
nanogrid.ini file through the NANOGRID™ controller web interface, refer to "To install the nanogrid.ini configuration
file through the controller web interface" on page 5.
NOTE: The nanogrid.ini configuration file must only be placed on the controller unit. Failure to install the file on the local
controller unit or failure to limit installation to the local controller unit will result in undesired behavior.
NOTE: If the nanogrid.ini configuration file is written incorrectly the NANOGRID™ controller will send a
StatusNotification with the NgErrorConfiguration error to the CSMS backend, and ignore the file.
To install the nanogrid.ini configuration file through the controller web interface
• Refer to the CGC500 INSTALLATION MANUAL for instructions on how to access the web interface on the CGC500
GRID CONTROLLER.
• Refer to the CHARGESTORM CONNECTED 2 USER MANUAL for instructions on how to access the web interface on
a CHARGESTORM CONNECTED 2 station.
1. In the web interface, go to “NANOGRID™” in the left menu.
1
2
3
2. Select the "Server" tab.
3. Do one of the procedures that follow.
a Push the “Choose file” button to open a file dialog window and select the file.
b. Drag and drop the nanogrid.ini file at the grey “Drag & Drop” area.
4. Press the “Upload" button to transfer the nanogrid.ini file to the NANOGRID™controller.
6Configuration instructions CTEK E-Mobility AB
4
5. Restart the NANOGRID™ controller to use a new or modified nanogrid.ini. The file is currently only processed at
system startup.
IMPORTANT: Any existing nanogrid.ini configuration file on the controller will be replaced when you install a new file
through the web interface.
To do a client (station) configuration
Note: Refer to the CHARGESTORM CONNECTED 2 USER MANUAL for instructions on how to access the web interface
on a CHARGESTORM CONNECTED 2 station.
1. In the web interface, go to “Configuration” in the left menu.
1
2
4
3
2. Select the "Grid" tab.
3. Make sure that “NANOGRID Load Balancing” is set to “Full".
4. If the value is not set to “Full,” change the value in the drop-down and press the “Save” button.
5. When prompted, push the “Reset” button on top of the web interface page to reset the applications on the station
and apply new settings.
Configuration instructions 7
CTEK E-Mobility AB
EN
5
To install the nanogrid.ini configuration file through the CHARGE PORTAL web
interface
1. Make sure that the NANOGRID™controller has been successfully set up to use the CHARGE PORTAL OCPP
backend.
2. Select the NANOGRID™controller node in the left menu.
Note: The illustration shows an example for the controller “CGC500”.
3
4
2
5
3. Select the "cog" icon.
4. Select the “Control” tab.
5. Push the NANOGRID™ configuration "Upload" button to select and install the nanogrid.ini file.
To install the nanogrid.ini configuration from a 3rd party CSMS (backend)
• Speak to your CSMS support for information.
Advanced configuration
To select load balancing scheduler
The scheduler controls how the scheduling (load balancing) will be done. Three schedulers are available:
EQUAL: This scheduler tries to keep a fair distribution among EVSEs with charging EVs.
FIFO: First in first out scheduling. The EVSEs with the longest charging session are prioritized.
SIMPLEFEEDBACK: A feedback-based scheduler that can be abbreviated as SFB in nanogrid.ini. This is the
recommended scheduler.
• Set the scheduler parameter at the top-level category to select scheduler.
8Configuration instructions CTEK E-Mobility AB
NOTE: The value is case-insensitive.
[General]
scheduler=SIMPLEFEEDBACK
Note: If the value is missing or incorrect, the EQUAL will be used as the default scheduler for the load balancing.
For more information about the schedulers, refer to "The NANOGRID™ schedulers" on page 12.
To do an additional fallback configuration for phase-switching supported stations
If a station is phase-switching it has the capability to either provide 3-phase current or a 1-phase current, on either
phase.
Note: The station node will inform the controller if it has phase-switching capabilities. Only the FIFO and
SIMPLEFEEDBACK schedulers support phase-switching station nodes.
1. Do an additional fallback configuration in the nanogrid.ini file.
Example:
[STATIC-1]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RTS
[SWITCHING-A]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/1/fallback_output=2
outlet/2/fallback_current=8
outlet/2/fallback_output=3
PhaseRotation=TRS
Note: STATIC-1 is a “normal” non-phase-switching station node. The outlet/x/fallback_output parameter configures
a phase-switching station to set which output must be provided if it goes oine. This parameter is only used for a
phase-switching station and will be ignored for other charging stations.
2. Use one of the values that follow:
• 0: No output (charging is not allowed).
• 1: 3-phase output.
• 2: 1-phase L1.
• 3: 1-phase L2.
• 4: 1-phase L3.
Feedback from non-EVSE loads
If a node has an external load that is measured by an energy meter, the scheduler takes it into consideration.
For example, if a fuse both has a charging station and large fan attached, the load of the fan is measured and the
scheduler takes it into consideration when it controls the charging station.
Example:
[SHARED-BOARD]
type=measuredfuse
meter="modbus/1/1"
rating=20
parent=MAINPANEL
[STATION-1]
type=station
parent=SHARED-BOARD
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RTS
The meter="modbus/1/1" parameter value is used by the controller to communicate with the energy meter:
Definitions:
modbus The controller must use the modbus communication protocol to read values from the energy
meter.
1The energy meter communication wire is connected to the first serial port of the controller.
1The modbus device address of the energy meter, in this example 1. The address is configured on
the energy meter.
NOTE: For CHARGESTORM CONNECTED 2 stations, modbus/2/1 and modbus/2/2 are reserved for the EVSE EV
feedback modbus energy meters that are located inside the station. This applies if you use a NANOGRID™ local master
controller.
NOTE: Modbus TCP energy meters are also supported. Currently we support Carlo Gavazzi EM24 series.
NOTE: Port 1 is the only available port on the CGC500
Example:
meter=modbus/192.168.0.123 to add a meter which has IP-address 192.168.0.123
Distribution board that measures the whole load
If a node has an energy meter attached that measures the load at the point, for example the aggregated load of the sub
nodes, the scheduler can use that information to make its scheduling.
This contrasts with the measured fuse where only the external load is measured. The aggregated fuse is the sum of
non-EV loads and EV loads.
Example:
[SHARED-BOARD]
type=aggregatedfuse
meter="modbus/1/1"
rating=20
parent=MAINPANEL
Configuration instructions 9
CTEK E-Mobility AB
EN
[STATION-1]
type=station
parent=SHARED-BOARD
outlet/size=2
outlet/1/fallback_current=6
outlet/2/fallback_current=6
PhaseRotation=RTS
For information about the meter="modbus/1/1" parameter value, refer to "Feedback from non-EVSE loads" on page
8.
EMS Configuration
If a node has an EMS (Energy Management System) attached that announces the available current in the grid, the
scheduler can use that information to make its scheduling.
In this case, the available current through the distribution board will be set to the minimum of the rating and what the
EMS reports as available.
EMS devices can be configured on a distribution board, for example nodes of type:
• fuse
• measuredfuse
• aggregatedfuse
An EMS is added with the configuration:
[MAINPANEL]
type=fuse
rating=200
parent=MAINPANEL
ems=ehub:192.168.200.12
emsfallback=100
Definitions:
[MAINPANEL] The identity of the fuse node to add the EMS to.
ems=
ehub:192.168.200.12
The endpoint of the EMS.
It consists of the EMS <type>:<address>. In the example the type is ehub and the address is
192.168.200.12.
emsfallback=100 The fallback current in Ampere to use if connection to the EMS device is lost.
NOTE: Currently the only supported device is the Ferroamp EnergyHub. Use the device type ehub to enable the
Ferroamp EnergyHub.
NOTE: The emsfallback configuration is a required parameter. If missing, the EMS will not be set up properly by the
NANOGRID™ controller.
NOTE: The EMS is considered oine (fallback is used) if no successful communication with the device has occurred in
a 30 second period.
To connect stations used in IT-Net
• Connect stations used in IT-net as shown in the schematic illustration.
Stations 1, 4, 7 ...
Stations 2, 5, 8 ...
Stations 3, 6, 9 ...
X1 LEFT
X4 COMMON
X3 RIGHT
X1 LEFT
X4 COMMON
X3 RIGHT
X1 LEFT
X4 COMMON
X3 RIGHT
L1L3L2
To do the main fuse configuration
• Configure NANOGRID™ with a main fuse setting equal to the fuse value divided by 1.732 (the square root of three)
and round down to the nearest value.
For example, for fuse rating 63 A set the fuse configuration parameters to 63/1.732 ≈36A.
To do the EVSE mapping
Each station and EVSE must be configured to reflect how the input phases are connected and how the measured
current values are mapped to those phases. Refer to the schematic illustration in "To connect stations used in IT-Net"
on page 9.
• Map the EVSEs according to the table. It is important to configure the phase and EVSE mappings correctly and
according to the charging station type.
Station number EVSE Map current to Electrical load
1,4,7 LEFT L1 L1 to common L2
RIGHT L3 L3 to common L2
2,5,8 LEFT L2 L2 to common L3
RIGHT L1 L1 to common L3
3,6,9 LEFT L3 L3 to common L1
RIGHT L2 L2 to common L1
10 Configuration instructions CTEK E-Mobility AB
An example configuration, where there is a 63 A fuse in the input distribution panel, called MAINPANEL. However,
according to the rule in "To connect stations used in IT-Net" on page 9, MAINPANEL is configured with 36 A. (63 /
sqrt(3) = 36).
NOTE: Start the line with the # character to add comments in the nanogrid.ini file.
NOTE: If the 2 phases connected to each EVSE (EV connector), is connected to L1 & L2 on the input terminal, or if they
must be connected to L1 & L3 depends on the type of the charging station. Refer to the manual of the charging station.
[MAINPANEL]
type=aggregatedfuse
# The rating is the actual fuse 63A / sqrt(3) = 36A, this is done as this
# is an IT-net installation.
rating=36
parent=MAINPANEL
[CC2-1]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RxT
[CC2-2]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=SxR
[CC2-3]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TxS
Monitoring/Verification
To monitor and verify the NANOGRID™ installation through the NANOGRID™ con-
troller web interface
The NANOGRID™ controller web interface has a tool called “GRID UI” that can be used to monitor and verify the
NANOGRID™ installation.
• Refer to the CGC500 INSTALLATION MANUAL for instructions on how to access the web interface on the CGC500
GRID CONTROLLER.
• Refer to the CHARGESTORM CONNECTED 2 USER MANUAL for instructions on how to access the web interface on
a CHARGESTORM CONNECTED 2 station.
1. In the web interface, go to “NANOGRID” in the left menu
2. Select the “GRID UI” tab.
1
2
3
3. Refer to the definitions in the table for more information about the "GRID UI" tab.
Node name Identity name of the node.
Rating Fuse or station rating.
Car assigned Charging capacity that has been assigned to the station by the NANOGRID™ controller.
This is the maximum charging current that is reported to any connected EV.
Assigned Charging capacity that has been assigned to the station by the NANOGRID™controller, per
phase.
Measured Current draw per phase, reported by the station to the NANOGRID™ controller.
Configuration instructions 11
CTEK E-Mobility AB
EN
Phase Phase(s) used by the EVSE, either All, L1, L2 or L3.
State State of the EVSE, including but not limited to:
• Available: No EV connected.
• ActiveCharging: An EV is connected and is charging.
• SuspendedEV: An EV is connected but does not request charging.
• VehicleReady: An EV is connected that requests charging, but no assignment is
available from the EVSE, the NANOGRID™ controller has set assignment to zero for
the EVSE.
• Pause: An EV is connected that does not request charging and there is no
assignment available from the EVSE.
• Faulty: The EVSE is faulted.
• Penalty: An EV has drawn too much current.
Online Station connection status: oine or online.
EVSE ID 1 or 2.
For dual EVSE stations:
• 1: Left EVSE
• 2: Right EVSE
For single EVSE stations:
• 1: Right EVSE
Connection Type FUSE: fuse node
MQTT: station node. The MQTT communication protocol is used to communicate between
stations and the NANOGRID™ controller.
Software description
NOTE: Many illustrations in the examples below are screenshots from the CHARGESTORM CONNECTED 2 / GRID
CONTROLLER web interface NANOGRID™ "GRID UI” tab.
Firmware upgrade of station nodes
The first time a station connects to the NANOGRID™ controller, it will report its currently installed firmware version.
The controller will change the firmware of the station if it is necessary by transferring a binary file to it and start a
firmware install. This means that the controller can both upgrade and “downgrade” the firmware of the station, as it is
preferred that the controller and stations use the compatible version.
If the firmware is installed successfully, the station will automatically restart to complete the installation.
If there are any connected EVs to the station, the restart will be delayed until all EVs have been disconnected. All
available EVSEs are temporarily disabled until the restart has been done.
NOTE: If the station is connected to an OCPP backend, it will send FirmwareStatusNotification.req notifications.
Automatic configuration of station nodes and controller
The first time a station connects to the NANOGRID™controller, the station will report the configuration parameters to
the controller (per EVSE) as follows:
• Fuse rating: the EVSE fuse rating.
• Minimum allowed charging current: the minimum assignment required from the controller to start a charging
session. This value is usually 6 A, but other settings can change it. The minimum required charging current cannot
be below 6 A.
• Phases connected: Which phases, in relation to the main grid, is used by the EVSE. This can be all 3 (3-phase
EVSE) or 1 of L1, L2, L3 (1-phase EVSE).
• Phase switching supported: determines if the EVSE supports phase-switching, in example the function to supply
3-phase current or output to a 1- phase.
• Primary phase: Which phase, in relation to the main grid, is the main phase in the EVSE charging socket. This is the
phase which 1-phase EVs will use.
The controller will use the configuration information set locally in the station during load balancing.
The NANOGRID™controller will also report configuration from the nanogrid.ini configuration file to the station:
• Phase rotation: how the station is connected to the grid. If this value is dierent from the station local
configuration, the station will apply the value from the controller and restart. This will make the station re-calculate
how the EVSE phases are connected in relation to the grid. These are re-sent to the controller.
• Fallback configuration
The Phase rotation and fallback configuration in the nanogrid.ini configuration file overwrites local station configuration
values, if it is dierent.
Oine and fallback behavior
The NANOGRID™controller considers a station to be oine when no communication has been received from the station
for 60 seconds.
The station is oine if it has not received any communication from the NANOGRID™controller for 60 seconds.
When a station is oine, the NANOGRID™controller will reserve the configured fallback value(s) to the station. This
reservation is subtracted from the total available charging capacity for the NANOGRID™installation.
The station will only let a charging EV to draw (at most) the configured fallback value.
Example:
Distribution Board MAINPANEL 50 A with 4 EVSEs.
STATION_1: EVSE1 (16 A)
STATION_1: EVSE2 (16 A)
STATION_2: EVSE3 (16 A)
STATION_2: EVSE4 (16 A)
All EVSEs have fallback configured to 10 A. outlet/1/fallback_current=10 & outlet/2/fallback_current=10 in the nanogrid.
ini configuration file.
• STATION_2 has two charging EVs, STATION_1 has both EVSEs available. EVSE3 and EVSE4 are assigned 16 A each.
• STATION_1 goes oine, the controller reserves 10 A (for each EVSE) of the total capacity, thus 30 A remains for
charging. Assignment to EVSE3 is reduced.
12 Configuration instructions CTEK E-Mobility AB
??
10A 10A 30A remaining for EVs
CONTROLLER
MAX
50A
The NANOGRID™ schedulers
The NANOGRID™schedulers are used to balance the load among connected stations. In most scenarios, the
recommended scheduler is SIMPLEFEEDBACK.
EQUALSHARE scheduler
The EQUALSHARE scheduler tries to keep a fair distribution of capacity among EVSEs.
1. Any oine EVSE is allocated their respective configured fallback capacity.
2. The number of EVSEs with charging EVs are counted (Count).
3. Total available capacity is calculated (TotCap).
4. Each charging EVSE gets assigned (TotCap/Count) Ampere.
Example:
Setup: Distribution Board MAINPANEL 50 A with 4 EVSEs.
STATION_1: EVSE1 (16 A)
STATION_1: EVSE2 (16 A)
STATION_2: EVSE3 (16 A)
STATION_2: EVSE4 (16 A)
1. No EVs connected at the start: thus, 0 A assignment:
2. EVs connect to EVSE 1, 2 and 3. Each EVSE receives an assignment of 50 A / 3 ≈16 A from the EQUALSHARE
scheduler:
3. A fourth EV connects to the available EVSE. Each EVSE receives an assignment of 50 / 4 ≈12 A from the
EQUALSHARE scheduler:
FIFO scheduler
The FIFO scheduler operates on a first in, first out basis, FIFO. EVSEs with the longest charging duration are prioritized.
EVSEs with charging EVs are assigned the reported EV current draw + 3 A.
Example:
Setup: Distribution Board MAINPANEL 50 A with 4 EVSEs.
STATION_1: EVSE1 (16 A)
STATION_1: EVSE2 (16 A)
STATION_2: EVSE3 (16 A)
STATION_2: EVSE4 (16 A)
Configuration instructions 13
CTEK E-Mobility AB
EN
1. No EVs connected at the start: thus, 0 A assignment:
2. EVs connected to EVSE 1, 2 and 3:
• EV1 draws 16 A
• EV2 draws 16 A
• EV3 draws 13 A
All EVSEs gets allocated their maximum assignment from the FIFO scheduler: 16 A.
3. A fourth EV connects to the available EVSE. As there is no available capacity to charge another EV (minimum
required is 6 A), the EVSE gets no current assignment:
4. EV1 disconnects, EV4 receives an assignment of 16 A from the FIFO scheduler:
SIMPLEFEEDBACK scheduler
The SIMPLEFEEDBACK scheduler uses the EVSE energy meter feedback to assign the capacity. Each EVSE periodically
reports the EV current draw to the controller.
Assignment is done individually per phase. If an EVSE uses a single-phase for charging (either physically connected, or
the connected EV only draws on one phase), that will be considered.
1. Any oine EVSE is allocated their respective configured fallback capacity.
2. EVSEs with charging EVs are assigned the reported EV current draw + 3 A. EVSEs with the longest charging
duration are being prioritized if the total capacity limit has been reached.
3. Remaining EVSEs with charging EVs but invalid feedback (e.g. broken energy meter) share the remaining capacity
equally. Similar to EQUALSHARE.
Example:
Setup: Distribution Board MAINPANEL 50 A with 4 EVSEs.
STATION_1: EVSE1 (16 A)
STATION_1: EVSE2 (16 A)
STATION_2: EVSE3 (16 A)
STATION_2: EVSE4 (16 A)
1. No EVs connected at the start: thus, 0 A assignment:
2. EVs connected to EVSE 1, 2:
• EV1 draws 14 A
• EV2 draws 6 A
EVSE1 receives an assignment of 16 A as 14 + 3 = 17, but EVSE maximum allowed is 16 A. EVSE2 receives an assignment
of 9 A as 6 + 3 = 9.
3. EV3 connects to EVSE3, EV4 connects to EVSE4:
• EV3 draws 16 A
• EVSE4 reports that energy meter values are invalid!
EVSE3 receives an assignment of 16 A from the SIMPLEFEEDBACK scheduler. EVSE4 receives an assignment of the
remaining capacity of the grid: 50 –16 – 9 – 16 = 9 A
14 Configuration instructions CTEK E-Mobility AB
Appendix
Glossary of terms/abbreviations/acronyms
Controller The NANOGRID™controller, a GRID CONTROLLER, e.g. CGC500 or a LOCAL CONTROLLER, is a charging station which operates as a controller and a station node.
CSMS Charging Station Management System.
EMS Energy Management System.
EV Electric Vehicle.
EVSE Electric Vehicle Supply Equipment. A station can have 1 or more EVSEs. The CHARGESTORM CONNECTED 2 stations have 1 or 2 EVSEs.
Load The current load used in the grid. It comes from the charging EVs or other.
Configuration instructions 15
CTEK E-Mobility AB
EN
[General]
scheduler=SIMPLEFEEDBACK
[[MAINPANEL]
type=fuse
parent=MAINPANEL
rating=100
[STATION_01]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_02]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
[STATION_03]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TRS
[STATION_04]
type=station
parent=MAINPANEL
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
Complete installation examples
4-station installation, NANOGRID™ local
CC2
STATION 1STATION 2
32A 32A
RST
CC2
32A 32A
CC2
STATION 3
32A 32A
CC2
STATION 4
32A 32A
TR
SR
ST
MAINPANEL
100A
STR
16 Configuration instructions CTEK E-Mobility AB
[General]
scheduler=SIMPLEFEEDBACK
[MAINPANEL]
type=fuse
parent=MAINPANEL
rating=200
[FUSE_01]
type=fuse
parent=MAINPANEL
rating=100
[FUSE_02]
type=fuse
parent=MAINPANEL
rating=100
[STATION_01]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_02]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
[STATION_03]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TRS
8-station installation with sub-fuses, NANOGRID™ local
CC2
STATION 1
32A 32A
CC2
STATION 2
32A 32A
CC2
STATION 3
32A 32A
CC2
STATION 4
32A 32A
STRRST
CC2
STATION 5
32A 32A
STR
CC2
STATION 6
32A 32A
CC2
STATION 7
32A 32A
CC2
STATION 8
32A 32A
TRS RSTSTR
FUSE2
100A
FUSE1
100A
MAINPANEL
200A
TRSRST
[STATION_04]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_05]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
[STATION_06]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TRS
[STATION_07]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_08]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
Configuration instructions 17
CTEK E-Mobility AB
EN
[General]
scheduler=SIMPLEFEEDBACK
[MAINPANEL]
type=aggregatedfuse
meter="modbus/1/123"
parent=MAINPANEL
rating=200
[FUSE_01]
type=fuse
parent=MAINPANEL
rating=100
[FUSE_02]
type=fuse
parent=MAINPANEL
rating=100
[STATION_01]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_02]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
[STATION_03]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TRS
8-station installation with sub-fuses, NANOGRID™ grid central CGC500/CGC100
Measuring the EVSE and the external load.
CC2
STATION 1
32A 32A
RST
CC2
STATION 2
32A 32A
CC2
STATION 3
32A 32A
CC2
STATION 4
32A 32A
STR TRS RST
CC2
STATION 5
32A 32A
STR
CC2
STATION 6
32A 32A
CC2
STATION 7
32A 32A
CC2
STATION 8
32A 32A
TRS RSTSTR
FUSE2
100A
FUSE1
100A
MAINPANEL
200A
EM
CGC 500/100
[STATION_04]
type=station
parent=FUSE_01
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[STATION_05]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
[STATION_06]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=TRS
[STATION_07]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=RST
[[STATION_08]
type=station
parent=FUSE_02
outlet/size=2
outlet/1/fallback_current=8
outlet/2/fallback_current=8
PhaseRotation=STR
WWW.CTEKEMOBILITY.COM
20023534 Rev. 1
This manual suits for next models
4
Table of contents
Other CTEK Controllers manuals
