Wallbox PUP1 Power Sharing 48A EV Charger Installation Guide

POWER SHARING
Installation Guide

GETTING STARTED

Power Sharing Overview

Power Sharing allows you to connect two or more Wallbox chargers (up to 25 total) on a common electrical circuit and dynamically balance the power available to each charger. As vehicles are connected to or disconnected from chargers in a Power Sharing  system, or as vehicle batteries complete their charging cycles, the system will automatically adjust the power available to each charger (and vehicle) as the power supply and demand changes.
The Power Sharing system ensures that the total power used at peak demand does not exceed the configured amperage, while simultaneously ensuring the maximum available power (at least 6 Amps, up to the maximum set rating of each charger) is available to  each connected vehicle.
If connected chargers are already utilizing the maximum available power and additional vehicles are then connected to chargers in the system, those vehicles will be automatically queued for charging as soon as the minimum amount of power is available to  begin charging.

Installation and configuration of a Power Sharing system requires additional steps and materials as described in this document. As this process involves high-voltage equipment, we require you to engage a qualified electrician to conduct and complete this set-up.

Key Features:

• Compatible with all EVs.
• No additional equipment required (only communication cabling and conduit).
• No Internet connection required.
• Default minimum power delivery, even if a charger loses connection to the shared network.
• No subscription fees or recurring costs.
• Can be used to limit amperage on a shared branch circuit when allowed by the applicable electrical code.

Technical notes:

• Maximum number of chargers: 25.
• Checking with local code may also be a requirement.
• Compliant with NFPA 70 NEC Article 625 as an Automatic Load Management System (ALMS).

Important Review the model of your Pulsar Plus chargers before installing the Power Sharing network. PUP1 and PUP2 models are not compatible on the same Power Sharing network.

Required Tools and Materials

Devices

| 2 or more
(For charger installation hinstructions, see the Pulsar Plus  Installation Guide)
---|---

Tools (Power Sharing Set-up)

INSTALLATION

Preparing the chargers

Before proceeding with Power Sharing setup, you should install the chargers according to the instructions as included in the charger’s Installation Guide. Note that depending on the type of charger installation (hardwired or NEMA plug), you will have additional  instructions as described below:

Installation type
Hardwired| Installation Guide section
Hardwire Installation| Steps to be excluded
Closing the charger| Additional step to be included
None
---|---|---|---
Plug-in| NEMA Plug-in Installation| Closing the charger| None

For NEMA plug-in installations, you typically will not have to open the charger; however, to setup plug-in chargers for Power Sharing, you will need to open each connected charger in order to perform some of the steps in this set-up. Refer to Pulsar Plus  Installation Guide for more information on how to open the charger.

After you have mounted your charger according to the instructions in the Installation Guide, ensure:

• The charger cover is not attached to the charger (disconnect the communications cable from the cover).
• The chargers are electrically wired (connected to a circuit).
• Any connected circuits are NOT powered on during installation.

To make handling of the chargers, cables, and connectors easier during the Power Sharing setup, you may want to install the holsters before proceeding. See the “Installing the Holster” section in the charger Installation Guide.

Note ensure that all of the chargers on the same Power Sharing network are wired to the same electrical feed and share the same grounding system.

Power Sharing Cabling
Connecting your chargers for Power Sharing requires installation of communication cabling. This cabling may be drawn through either of the following pathways:

Center opening
Use the small opening located at the bottom of the charger between the power input and the EV  connector cable output.| Power input opening
When allowed by local codes, run the data cable in the  same power supply conduit (same conduit used for the  hardwired electrical wiring).
---|---
When using this opening for the communications cabling, first remove the screw plug.  Use a wrench to hold the interior lock nut while unscrewing the plug using a flathead screwdriver from the bottom (exterior) side of the plug.|

Wiring
For Power Sharing, the chargers communicate through a daisy-chain cabling system. When connecting three or more chargers, the first and last chargers of the chain will be Terminating (T) chargers and the chargers in between will be Non-terminating (NT)  chargers as shown in the figure below. (Note: when connecting only two chargers, both will be Terminating.)

Installation
Draw the communication cables between the chargers through the selected conduit (see  Preparing the Chargers section above) as shown below. Ensure that the total length of the cable is no more than 820 feet (~250m)

The cabling consists of a daisy chain of a twisted pair of wires connecting the chargers.
We recommend to use the following cable-type: Ethernet Class 5E unshield, 1 pair.

Adding chargers in the future
If you anticipate adding chargers to the system in the future, there are two ways you can prepare the system now to make it ready for Power Sharing.
Option 1: Place a bus disconnecter to allow future chargers to be inserted in the daisy chain as shown in the option 1 wiring scheme below. If you are adding more chargers into the chain after this one, the switch will need to be changed from T to NT.
Option 2: Truncate the existing bus to add new charger(s) as shown in the option 2 wiring scheme below.

1. Open the charger following the installation guide of your Pulsar Plus.
2. Set the terminating resistance into NT, make the communication wiring as explained above and then close the charger.

Important: new chargers may be placed anywhere physically in relation to the existing chargers as long as you follow these rules:

• You maintain the logic of the daisy chain.
• You respect the cabling polarity as described above under “Installation”.

Wherever a future added charger is placed, the most important rule to follow is the logic of the daisy chain. Where the daisy-chain is terminated on both end devices and intermediate nodes are not terminated.

Option 1:

SETTING UP – PUP1

Configuration
To perform the setup of the charging network, verify the charger model re- direct to the stepby-step guide of the appropriate model: PUP1 at Page  11 /PUP2 at Page 19.

Every Power Sharing system consists of one Primary charger and from 1 to 24 Secondary chargers.
The Primary charger is the central control unit of the entire system and it is the only unit in the system that requires unique configuration. The Primary charger needs to be set as a Terminating (T). The key configuration for the Primary charger is the Current  Selector switch as shown below.
The termination configuration (T) is set by a switch inside the charger (see figure below). If you anticipate adding chargers to the system in the future, we suggest configuring two chargers as Terminating (T) and the other chargers as Non-terminating (NT).

For Power Sharing installations in PUP1 models, the maximum current has to be adjusted through the myWallbox app and not through the current selector. For more information on current adjustment through the app, please visit: https://support.wallbox.com/na/knowledgebase/adjust-the-charging-current/

To ensure a proper set-up, the measured resistance between CAN-H and CAN-L must be around 60 Ohms. If it differs, recheck the proper wiring and the T/NT configuration.

Finishing the Electrical Setup
Once you have configured the chargers (set Primary/Secondary status and T or NT setting) and correctly connected each to the electrical system (circuit), you may proceed to close the chargers as described in the charger Installation Guide (see “Closing the Charger”). Before closing your chargers, be sure to note your Primary charger as you will need to connect to this charger via the myWallbox app to complete its configuration.

Terminal/No Terminal

Configuring the Primary Charger

Once the installation has been powered on, the Power Sharing configuration must be finalised with the myWallbox app on the Primary charger. For PUP1, the Primary charger must be the unit with the rotary switch set to position 8.
Until the network is properly configured, the chargers will remain in the “UNCONFIGURED POWER SHARING” status in the myWallbox app.

myWallbox App and Account
To connect to the chargers and complete the configuration, you need to download the myWallbox app, create an account (in case the infrastructure manager doesn’t own one already or you cannot access it), add the charger to the account and connect to the  Primary charger via Bluetooth. See the charger Installation Guide for instructions for instructions.

If the installed network’s manager already own a myWallbox account with SUPER ADMIN/ADMIN access, you must use this account for configuring the Power Sharing system.
If you use your own account for setup, remember to UNLINK the charger from your account after system configuration to enable the owner’s management of the chargers.

Completing System Configuration with myWallbox
If this is the first time you have connected to any of the installed chargers, you will need to add the chargers to your myWallbox account.

1. Launch the myWallbox app on a Bluetoothenabled mobile device and log in to the account.

2. On the home screen, select “I already have a charger”. If adding additional chargers, click the “+” icon.

3. On the “Add Charger” screen, insert the serial number and UID for the charger you are adding. Ensure you set the correct state/province location, and click “Add”.

4. Repeat Steps 2 and 3 for each charger you are adding to the Power Sharing system.

Once you have added the chargers you are connecting to the Power Sharing system, stand in close proximity to the PRIMARY charger with your mobile device and Bluetooth switched on.

1. Launch the myWallbox app on your mobile device and log in.

2. From the list of chargers, select the charger you have setup as the PRIMARY charger.

3. Click the Configurations (gear) icon and then, from the Configurations screen, select “Installation Options” and select Upgrades.
   On the Power Sharing screen, you will need to adjust the following settings:
   1. Number of chargers. This is the TOTAL number of chargers in the Power Sharing system including the Primary charger.
   2. Maximum current per system (phase). This is the maximum amount of power available for all chargers connected to the Power Sharing system.
   Note: the system must be connected to a circuit rated to 125% of the maximum power dedicated to the chargers. For example, if the total power available to chargers is 200Amps, the circuit must be rated to 250Amps.
   3. Minimum current per charger. The default value is set at 6 Amps; however, some vehicles require a minimum current of 10Amps.

4. After you have entered all values, click “Save”. It may take up to a minute for the system to complete configuration.

Note: you only need to configure the PRIMARY charger as described into the myWallbox app.
No additional configuration is needed for the Secondary chargers.

OPERATING – PUP1

Status
Once each charger in the system has been powered on and configured, you can view the status of each charger in the myWallbox app. The status screen for Secondary chargers will be differen from the Primary charger’s status screen, as only the Primary charger  can adjust the Power Sharing system settings.
Reviewing the status of each charger can reveal issues with the installation or provide insight as to why a charger is not charging at its maximum current.

| |
---|---|---
App Settings
Status: Primary unit| App Settings
Status: Secondary unit| App Charger Dashboard:
POWER SHARING status
Status Text| Shown in| Description
---|---|---
PRIMARY CONFIGURED WITH  ALL SECONDARIES PAIRED| Power Sharing app screen| Shows only for Primary charger.
The network has been successfully set.
All chargers are connected with the Primary.
POWER SHARING ACTIVATED| Charger app home screen| The network has been successfully set.
The unit is connected to the primary unit.
PRIMARY CONFIGURED WITH  SOME SECONDARIES NOT PAIRED| Power Sharing app screen| Shows only for Primary charger.
The network has been successfully set. Some Secondary units are not connected.
Verify that the setting “number of chargers” in Primary unit coincides with the  number of chargers in the system. Check the bus communications cables between  the chargers.
UNCONFIGURED POWER SHARING| Charger app home screen| This is the initial status after powering on the set-up.
The unit is paired with the Primary unit but it detects that it is pending to be  configured.
The chargers will blink in red.
PRIMARY NOT CONFIGURED| Power Sharing app screen
PRIMARY NOT PAIRED| Power Sharing app screen| Shows only for Secondary chargers.
The number of chargers in the configuration are not consistent with the ones that  are connected with the Primary. Review “Configuring the Primary Charger” and ensure all steps are completed correctly.
SECONDARY PAIRED WITH  NETWORK| Power Sharing app screen| Secondary connected with the Primary. The installation has been successful.
SECONDARY NOT PAIRED WITH NETWORK| Power Sharing app screen| The Secondary chargers are not successfully connected with the Primary charger  on the Power Sharing network. This may occur if the system cannot successfully  communicate with the chargers within 30 seconds.
In this state, the charger LED halo will blink fast and Secondary chargers will be  limited to 6 Amps.
POWER SHARING ACTIVATED  WAITING ASSIGNATION| Charger app home screen| Insufficient power is available to this charger. This may occur if all available  system power is already assigned to other connected chargers/vehicles.
As other vehicles complete charging or are disconnected, when the minimum power is available, this charger will begin charging. The charger LED halo will pulse blue, indicating an active charging session.

Troubleshooting

LED halo displays red| • This is the default color on a Power Sharing system at start up. If it lasts more than 30 seconds,  check to ensure that the Power Sharing system has been properly configured. If not, correct the  system configuration and wait for up to another 30 seconds.
• Make sure the total number of chargers includes the Primary charger.
• Make sure the “Maximum current per system (phase)” is set correctly.
---|---
Charger(s) have a blinking green halo| • Poor contact on the communication cables. Check that all the communication cables are properly  connected on the chargers (see the Wiring section above).
• Incorrect resistance value between communication lines.
Turn off the power to all the chargers (circuit) and measure the resistance between the CAN-H and  CAN-L. If the measurement is not at or around 60 Ohms, check the wiring connections per the  “Wiring” section above.
The measured resistance value is not 60 Ohms| • If the resistance value is higher than 60 Ohms, there is only one charger in the T configuration.
• If the resistance value is lower than 60 Ohms, there are more than two chargers in the T  configuration.
• The Power Sharing system must have both the first and last chargers in the daisy chain set to the T configuration.
All the other chargers must be in NT configurations.
• If the Primary charger is not placed at either of the ends and is placed at any other position in the  daisy chain, it should be in the NT configuration.
• If the resistance value is not near 60 Ohms but the configuration is correct, there may be a charger  fault. To check for a fault:
Remove the CAN cables from all chargers.
Change the switch position to T for all chargers.
Check the resistance value for each charger.
• The T chargers should have a 120 Ohms resistance between lines.
• The NT chargers have open lines or zero resistance.
Erratic behaviour| • Reason: Poor contact on the communication cables.
Check that all the communication cables are  properly connected on the chargers.
• Incorrect configuration on the Primary.
• Incorrect resistance value between communication lines.
Turn off the power to all the chargers (circuit) and measure the resistance between the CAN-H and  CAN-L. If the measurement is not at or around 60 Ohms, check the wiring connections per the  “Wiring” section above.
Charger keeps waiting for assignment| • Charger assignment may last up to 30 seconds.
• Make sure that no schedules are programmed.
• Check that the Primary and Secondary chargers are all paired. If a charger is not paired, the  current available to that charger will be limited to 6 Amps.
• Verify the configuration of “Maximum Current per Phase”.
Remember that a connected vehicle will not charge unless there is a minimum of 6 Amps available.  If there are other connected vehicles and the available power is less than 6 Amps, any additionally  connected vehicle will go into a queue and will start charging when at least 6 Amps is available.

SETTING UP – PUP2

Configuration

To perform the setup of the charging network, verify the charger model re- direct to the stepby-step guide of the appropriate model: PUP1 at Page 11 / PUP2 at Page 19.
Every Power Sharing system consists of one Primary charger and 1 to 24 Secondary chargers.
The Primary charger is the central control unit of the entire system and it is the only unit in the system that requires unique configuration.
The Primary charger needs to be set as a Terminating (T). The key configuration for the Primary charger is the Current Selector switch as shown below.
The termination configuration (T) is set by a switch inside the charger (see figure below). If you anticipate adding chargers to the system in the future, we suggest configuring two chargers as Terminating (T) and the other chargers as Non-terminating (NT).

For Power Sharing installations in PUP2 model, the positions o-8-9 of the Rotary Switch are redundant and will not limit the current of the device. The other positions of the rotary switch will enable additional current limits.
For more information on current adjustment through the app, please visit: https://support.wallbox.com/na/knowledge-base/adjust-the-charging-current/

To ensure a proper set-up, the measured resistance between + Wire and – Wire must be around to 60 Ohms. If it differs from that, recheck the proper wiring and the T/NT configuration.

Finishing the Electrical Setup
Once you have configured the chargers (set Primary/Secondary status and T or NT setting) and correctly connected each to the electrical system (circuit), you may proceed to close the chargers as described in the charger Installation Guide (see “Closing the Charger”). Before closing your chargers, be sure to note your Primary charger as you will need to connect to this charger via the myWallbox app to complete its configuration.

Terminal/No Terminal

Configuring the Primary Charger
Once the installation has been powered on, the Power Sharing configuration must be finalised with the myWallbox app on the Primary charger:
For PUP2, select any unit to configure, and that charger will automatically become the Primary.
Until the network is properly configured, the chargers will remain in the “UNCONFIGURED POWER SHARING” status.

myWallbox App and Account
To connect to the chargers and complete the configuration, you need to download the myWallbox app, create an account (in case the infrastructure manager doesn’t own one already or you cannot access it), and connect to the Primary charger via Bluetooth. See  the charger Installation Guide for instructions for downloading the app and setting up a myWallbox account.

If the installed network’s manager already own a myWallbox account with SUPER ADMIN/ADMIN access, you must use this account for configuring the Power Sharing system.
If you use your own account for setup, remember to UNLINK your account from the charger after system configuration to enable the owner’s management of the chargers.

Completing System Configuration with myWallbox
If this is the first time you have connected to any of the installed chargers, you will need to add the chargers to your myWallbox account.

1. Launch the myWallbox app on a Bluetoothenabled mobile device and log in to the account.

2. On the home screen, select “I already have a charger”. If adding additional chargers, click the “+” icon.

3. On the “Add Charger” screen, insert the serial number and UID for the charger you are adding. Ensure you set the correct state/province location, and click “Add”.

4. Repeat Steps 2 and 3 for each charger you are adding to the Power Sharing system.

Once you have added the chargers you are connecting to the Power Sharing system, stand in close proximity to the PRIMARY charger with your mobile device and Bluetooth switched on.

1. Launch the myWallbox app on your mobile device and log in.

2. From the list of chargers, select the charger you have setup as the PRIMARY charger.

3. Click the Configurations (gear) icon and then, from the Configurations screen, select “Installation Options” and then select Upgrades.
   On the Power Sharing screen, you will need to adjust the following settings:
   1. Number of chargers. This is the TOTAL number of chargers in the Power Sharing system including the Primary charger.
   2. Maximum current per system (phase). This is the maximum amount of power available for all chargers connected to the Power Sharing system.
   Be reminded that the system must be connected to a circuit rated to 125% of the maximum power dedicated to the chargers.
   For example, if the total power available to chargers is 200Amps, the circuit must be rated to 250Amps.
   3. Minimum current per charger. The default value is set at 6 Amps; however, some vehicles require a minimum current of 10Amps.

4. After you have entered all values, click “Save”. It may take up to a minute for the system to complete configuration.

Note that you only will configure the PRIMARY charger as described into the myWallbox app.
No additional configuration is needed for the Secondary chargers.

OPERATING – PUP2

Status
Once each charger in the system has been powered on and configured, you can view the status of each charger via the myWallbox app. As a reminder, the status screen for Secondary chargers will appear different from that of the Primary charger as only the  Primary charger can adjust the system settings.

Reviewing the status of each charger can reveal issues with the installation or provide insight as to why a charger is not charging at its maximum current.

| |
---|---|---
App Settings
Status: Primary unit| App Settings
Status: Secondary unit| App Charger Dashboard:
POWER SHARING status
Status Text| Shown in| Description
---|---|---
PRIMARY CONFIGURED WITH  ALL SECONDARIES PAIRED| Power Sharing app screen| Displays only for Primary charger.
The network has been successfully set.
All chargers are connected with the Primary.
POWER SHARING ACTIVATED| Charger app home screen| The network has been successfully set.
The unit is connected to the primary unit.
PRIMARY CONFIGURED WITH  SOME SECONDARIES NOT PAIRED| Power Sharing app screen| Shows only for Primary charger.
The network has been successfully set. Some Secondary units are not connected.
Verify that the setting “number of chargers” in Primary unit coincides with the  number of chargers in the system. Check the CAN bus communications cables between the chargers.
UNCONFIGURED POWER SHARING| Charger app home screen| This is the initial status after powering on the set-up.
The unit is paired with the Primary unit but it detects that it is pending to be  configured.
The chargers will blink in red.
PRIMARY NOT CONFIGURED| Power Sharing app screen
PRIMARY NOT PAIRED| Power Sharing app screen| Shows only for Secondary chargers.
The number of chargers in the configuration are not consistent with the ones that are connected with the Primary. Review “Configuring the Primary Charger” and ensure all steps are completed correctly.
SECONDARY PAIRED WITH  NETWORK| Power Sharing app screen| Secondary connected with the Primary. The installation has been successful.
SECONDARY NOT PAIRED WITH NETWORK| Power Sharing app screen| The Secondary chargers are not successfully connected with the Primary charger  on the Power Sharing network. This may occur if the system cannot  successfully communicate with the chargers within 30 seconds.
In this state, the charger LED halo will blink fast and Secondary chargers will be  limited to 6 Amps.
POWER SHARING ACTIVATED  WAITING ASSIGNATION| Charger app home screen| Insufficient power is available to this charger. This may occur if all available  system power is already assigned to other connected chargers/vehicles.
As other vehicles complete charging or are disconnected, when the minimum power is available, this charger will begin charging. The charger LED halo will  pulse blue, indicating an active charging session.

Troubleshooting

The charger LED halo is red| • This is the default color on a Power Sharing system at start up. If it lasts more than 30  seconds, check to ensure that the Power Sharing system has been properly configured. If not,  correct the system configuration and wait for up to another 30 seconds.
• Make sure the total number of chargers includes the Primary charger.
• Make sure the “Maximum current per system (phase)” is set correctly.
---|---
Charger(s) LED halo blinking red + another charger  with a static red halo| • This signals an incorrect configuration. If you add a charger to the Power Sharing network  without configuring it in the myWallbox app, the new charger will display a red halo, while the  primary charger will have a blinking red halo. To fix this, access the Power Sharing menu in  the myWallbox app through the primary charger and adjust the number of chargers in the  corresponding field.
Charger(s) LED halo are blinking green| • Poor contact on the communication cables. Check that all the communication cables are  properly connected on the chargers (see the Wiring section above).
• Incorrect resistance value between communication lines. Turn off the power to all the  chargers (circuit) and measure the resistance between the (+) Wire and (-) Wire. If the measurement is not at or around 60 Ohms, check the wiring connections per the “Wiring”  section above.
The measured resistance value is not 60 Ohms| • If the resistance value is higher than 60 Ohms, there is only one charger in the T  configuration.
• If the resistance value is lower than 60 Ohms, there are more than two chargers in the T  configuration.
• The Power Sharing system must have both the first and last chargers in the daisy chain set to  the T configuration.
All the other chargers must be in NT configurations.
• If the Primary charger is not placed at either of the ends and is placed at any other position in  the daisy chain, it should be in the NT configuration.
• If the resistance value is not near 60 Ohms but the configuration is correct, there may be a  charger fault. To check for a fault:Remove the communications cables from all chargers.
Change the switch position to T for all chargers.
Check the resistance value for each charger.
• The T chargers should have a 120 Ohms resistance between lines.
• The NT chargers have open lines or zero resistance.
Erratic behaviour| • Reason: Poor contact on the communication cables.
Check that all the communication cables are  properly connected on the chargers.
• Incorrect configuration on the Primary.
• Incorrect resistance value between communication lines.
Turn off the power to all the chargers (circuit) and measure the resistance between the wire. If  the measurement is not at or around 60 Ohms, check the wiring connections per the “Wiring”  section above.
The charger keeps waiting for assignment| • Charger assignment may last up to 30 seconds.
• Make sure that no schedules are programmed.
• Check that the Primary and Secondary chargers are all paired. If a charger is not paired, the  current available to that charger will be limited to 6 Amps.
• Verify the configuration of “Maximum Current per Phase”.
Remember that a connected vehicle will not charge unless there is a minimum of 6 Amps  available. If there are other connected vehicles and the available power is less than 6 Amps,  any additionally connected vehicle will go into a queue and will start charging when at least 6  Amps is available.

Service
Need more assistance? Contact Wallbox customer service:

888-787-5780
support.wallbox.com
service.na@wallbox.com

support.wallbox.com

References

• Home - Wallbox Help Center
• How to adjust the charging current - Wallbox Help Center
• How to adjust the charging current - Wallbox Help Center

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