Load Balancing and Power Limits

The Charge Controller provides several limits that restrict charging current or power.

These limits help with:

• protecting electrical components
• preventing overloads in the installation
• staying within local grid requirements
• operating chargers within contractual limits

1 High level overview

The available limits depend on the charger setup.

Connector-specific limits	Double chargers with single feed
# Maximum Current Installation Current Limit Operator Current Limit Power Limit	Charging Station Hardware Current Limit Charging Station Installation Current Limit Operator Current Limit Power Limit

When single feed is enabled, Charging Station Installation Current Limit replaces the connector-specific Installation Current Limit.

2 Relationship between the limits

2.1 Priority order

Connector-specific limits	Double chargers with single feed
# Maximum Current Installation Current Limit Operator Current Limit Power Limit DLM settings	Charging Station Hardware Current Limit Charging Station Installation Current Limit Operator Current Limit Power Limit DLM settings

2.2 Value relationship

Connector-specific limits	Double chargers with single feed
# Maximum Current has to be greater than or equal to Installation Current Limit Installation Current Limit has to be greater than or equal to Operator Current Limit Operator Current Limit has to be greater than or equal to Power Limit	Charging Station Hardware Current Limit has to be greater than or equal to Charging Station Installation Current Limit Charging Station Installation Current Limit has to be greater than or equal to Operator Current Limit Operator Current Limit has to be greater than or equal to Power Limit

3 Parameters

Parameter	Set by	Location	Hardware context	Instructions	Explanation
# Maximum Current	Manufacturer	> Manufacturer	Standalone charging station Double charging station with a dedicated feed per connector	See instructions	Defines the maximum current-carrying capacity of the connector hardware Relevant for the outlet or fixed charging cable, protection devices, energy meters, contactors, and relays Can be set in increments of 1 A in the range of 0 to 80 A Typical values are 16 A, 20 A, 32 A, and 63 A
# Installation Current Limit	Installer	> INSTALLATION > General Installation	Standalone charging station Double charging station with a dedicated feed per connector	See instructions	Defines the maximum current-carrying capacity of the upstream installation for one connector Must be less than or equal to Maximum Current This setting is a real limit, not just documentation Can be set in increments of 1 A in the range of 0 to 80 A Requires local access to the charger When single feed is enabled, this setting is replaced by Charging Station Installation Current Limit
# Operator Current Limit	Operator or Installer	> LOAD MANAGEMENT > Local	Standalone charging station Double charging station	See instructions	Defines the maximum charging current for one connector Must be less than or equal to Installation Current Limit For double chargers with single feed, must be less than or equal to Charging Station Installation Current Limit Can be used for contractual or operational reasons Can be set in steps of 1 A from 6 A to 80 A, also during charging sessions Values above 32 A are only theoretically feasible in this context Can also be adjusted with the dashboard slider Allows the value 0
# Charging Station Hardware Current Limit	Manufacturer	> Manufacturer > Master/Slave Mode	Double charging station with single feed	See instructions	Only relevant for double charging stations with single feed Defines the maximum current-carrying capacity of the complete charging station when both connectors share one feed Can be set in increments of 1 A in the range of 0 to 160 A Default value: 32 A Requires master/slave mode enabled Requires single feed enabled Configured on the master controller
# Charging Station Installation Current Limit	Installer	> INSTALLATION > General Installation	Double charging station with single feed	See instructions	Only relevant for double charging stations with single feed Defines the maximum current-carrying capacity of the upstream installation for the complete charging station Must be less than or equal to Charging Station Hardware Current Limit This setting is a real limit, not just documentation Can be set in increments of 1 A in the range of 0 to 160 A Default value: 32 A Replaces the connector-specific Installation Current Limit when single feed is enabled May be combined with Dynamic Load Balancing Requires master/slave mode enabled Requires single feed enabled
# Power Limit	Installer	> INSTALLATION > Grid protection	Standalone charging station Double charging station	See instructions	Limits the power supplied during charging to help meet grid requirements The function considers the active phases and calculates the current accordingly so the configured maximum is not exceeded In manual configuration, the power limit can be set in increments of 1 W between 4,140 W and 43,000 W Progressive mode assumes a single-phase EV and reduces the current after one minute when more phases are used Conservative mode assumes a three-phase EV and increases the current when fewer phases are used Slow charging (Austria) limits the maximum power to 5.5 kW per connector using progressive mode On dual connector chargers, the limit is applied to both connectors individually The Installer can enable the function in the installer section with

4 Configuration

4.1 Maximum Current

1. Log in to the using the Manufacturer
2. Under Manufacturer set Maximum Current
3. At the bottom of the , click , then click to apply the changes

4.2 Installation Current Limit

1. Log in to the using the Installer
2. Under INSTALLATION > General Installation set Installation Current Limit
3. At the bottom of the , click , then click to apply the changes

4.3 Operator Current Limit

1. Log in to the using the Operator
2. Under LOAD MANAGEMENT > Local set to the desired value
3. At the bottom of the , click

4.4 Charging Station Hardware Current Limit

1. Log in to the using the Manufacturer
2. Under Manufacturer > Master/Slave Mode enable Charging Station with single feed
3. Ensure master/slave mode is enabled and the controller is configured as Master
4. Set Charging Station Hardware Current Limit
5. At the bottom of the , click , then click to apply the changes

tip

To expose this setting to Installers, enable Charging Station with single feed is available to Installer.

4.5 Charging Station Installation Current Limit

1. Log in to the using the Installer
2. Ensure master/slave mode is enabled
3. Ensure Charging Station with single feed is enabled
4. Under INSTALLATION > General Installation set Charging Station Installation Current Limit
5. At the bottom of the , click , then click to apply the changes

4.6 Power Limit

1. Log in to the using the Installer
2. Under INSTALLATION > Grid protection turn On
3. At the bottom of the , click , then click to apply the changes

5 Frequently asked questions

• Maximum Current, Installation Current Limit, Operator Current Limit, and Power Limit.

• Charging Station Hardware Current Limit and Charging Station Installation Current Limit.

• It is replaced by Charging Station Installation Current Limit.

• Maximum Current → Installation Current Limit → Operator Current Limit → Power Limit → DLM settings.

• Maximum Current ≥ Installation Current Limit ≥ Operator Current Limit ≥ Power Limit.

• Yes, it can be adjusted during charging sessions and can also be set to 0.

• It defines the maximum current available for the entire charging station when two connectors share a single feed.

• It limits the charging power to 5.5 kW per connector using the progressive power limiter mode.

• Progressive mode assumes a single-phase vehicle and reduces current when more phases are detected, while conservative mode assumes a three-phase vehicle and increases current when fewer phases are used.

• The configured limit is applied individually to each connector.