805-0033 LYNK II Installation Manual
805-0033 LYNK II Installation Manual
Breadcrumbs

Morningstar Open-Loop Configuration

There may be instances when closed-loop communication is not possible, such as when either the ReadyBMS module or LYNK II Communication Gateway has failed. Whenever possible, use a closed-loop configuration.

When the only option is to use open loop, follow the steps below to reset the MPPT controller and commission it to use open-loop charge settings.
Reset MPPT Controller

  1. From the onboard meter display of the MPPT controller, touch the down arrow to display the Main Menu.

  2. Press the arrow buttons to navigate to Main Menu > Setup > Installer Password
    Enter the installer password defined in the GenStar Installation, Operation and Maintenance Manual.

  3. Commands > Factory Reset
    Reset the MPPT controller.

Set Up Open Loop

  1. Follow the commissioning steps defined in “Setting Closed-loop Configuration on the Morningstar Device”, “Commissioning the GenStar MPPT”, up to step 6.

  2. Set Closed Loop BMS to No.

  3. Set the Battery Charging Profile (low voltage disconnect / reconnect) to 6 LiFePO4-Low.

  4. Set the Battery Load Profile. Set the value in brackets if the application requires a larger contingency reserve on the battery.

    • 48 V / 52.8 (50 V / 52.6 V)

  5. Set RTS Required (Remote Temperature Sensor) to No.

  6. Reboot the MPPT.

Configuration

  1. Power up the GenStar MPPT and confirm it's connected to the network.

  2. Connect to the power conversion device by typing GenStar’s IP address into a web browser. (E.g. http://192.168.1.253, find the IP address in Main Menu > SETTINGS > Network)
    The LiveView web interface opens.

  3. In the Installer Access Password field, enter the installer password defined in the GenStar Installation, Operation and Maintenance Manual.

  4. INSTALLER SETUP > Charger > Battery Info > Battery Size
    Confirm the size is correctly set as the Rated Capacity (Ah) of the battery times the number of batteries. Change the battery size if required.

  5. INSTALLER SETUP > Charger > Battery Charge Settings
    Configure the battery charging profile. Select Custom and set the values as shown in the tables for the battery.

image-20250616-184412.png

Battery Charge Settings

48V

AES RACKMOUNT
48-48-5120 / 48-48-5120-H

HELIOS ESS
52-48-16000

Absorption Voltage

55.2 V

Absorption Time

3 hours

Float Voltage

53.6 V

Equalization Voltage

Disable

Equalization Time

—

Equalization Interval

—

  1. INSTALLER SETUP > Charger > Battery Charge Settings > Installer Setup
    Set the Temperature Compensation Coefficient to Disabled.

  2. Reboot the MPPT and start using it with the batteries.

NOTE

Rebooting the MPPT is required to update the MPPT with the edited settings.