Charging the Lead-Acid Battery After Automatic Shutdown (Emergency Charge Mode)

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When a battery is deeply discharged, the battery inverter shuts down automatically and you cannot restart it. In order to start the battery inverter again after an automatic shutdown, you must charge the battery. The emergency charge mode is designed for charging the battery.

The emergency charge mode is only an option in single-phase off-grid systems. For all other Sunny Island systems, the system configuration must be adjusted temporarily.

DANGER

Danger to life due to electric shock when live components or cables are touched

High voltages are present in the conductive components or cables of the product. Touching live parts and cables results in death or lethal injuries due to electric shock.

  1. Do not touch non-insulated parts or cables.
  2. Disconnect the product from voltage sources and ensure it cannot be reconnected before working on the device.
  3. After disconnection, wait 15 minutes until the capacitors have discharged.
  4. Observe all safety information on components associated with the product.
  5. Wear suitable personal protective equipment for all work on the product.

Restricted management functions in emergency charge mode

In emergency charge mode, the generator management is not active. The limits for voltage, current and frequency are not monitored. Set the maximum current consumption of the battery inverter for charging the battery in emergency charge mode. The battery inverter does not record additional stress on the generator caused by loads.

Requirement:

  • Lead-acid batteries must be connected (for lithium-ion battery see documentation of the battery manufacturer).

Procedure:

  • Connect the generator with connection AC1.

  • Adjust the system configuration for the emergency charge mode (not required for single-phase off-grid system).

  • Charge the battery.

  • Disconnect the generator from connection AC1.

  • Restore the original system configuration (not required for single-phase off-grid system).

  • Start the off-grid system.

Connect the generator with connection AC1.

  1. Disconnect the inverter from all voltage sources ( > Disconnecting the Inverter from Voltage Sources).
  2. Open the inverter ( > Opening and Closing the Inverter).
  3. Only if the system is not a single-phase off-grid system, connect the system as a single-phase off-grid system (single system) temporarily (see system description "Off-Grid Systems" of the battery inverter). In systems with more than 1 battery inverter, the following rules must be observed:

    • If the system is a single-cluster system (single-phase or three-phase), the master must be temporarily connected as a single-phase off-grid system.

    • If the system is a multicluster system (single-phase or three-phase), the master of the main cluster must be temporarily connected as a single-phase off-grid system.

  4. WARNING

    Danger to life from electric shock due to incorrect connection of the neutral conductor

    Connecting the neutral conductor incorrectly can cause failure of the protective functions in the system. This can result in death or serious injury.

    1. Ensure that the generator is connected to AC2 as specified for off-grid systems ( > Connecting the Generator in an Off-Grid System).
  5. Bridge the terminals AC1 Loads/SunnyBoys L and AC2 Gen/Grid L.
  6. Close the battery inverter ( > Opening and Closing the Inverter)

Adjust the system configuration for the emergency charge mode (not required for single-phase off-grid system)

  1. Ensure that all loads are switched off.
  2. Close the load-break switch of the battery fuse.
  3. Start the generator.
  4. Switch the battery inverter on ( > Switching on the System).
  5. Activate the user interface of the inverter ( > Establishing a connection to the user interface).
  6. Log in as Installer ( > Logging In and Out of the User Interface).
  7. Save the current configuration to a file( > Saving the Configuration in a File)
  8. Start the installation assistant ( > Starting the Installation Assistant).
  9. Select [Save and next] for each step up to the step Application.
  10. Select the [New system configuration] button.
  11. Select the option Functions for off-grid operation under Select application.
  12. Select [Save and next].
  13. Select the option Single phase under Type.
  14. Select the option Generator under Grid-forming generator.
  15. Enter the nominal current of the generator connected under Nominal current.
  16. Select [Save and next] for each step up to the step Summary.
  17. Once all settings are correct, select [Next] in the summary.

Charging the Battery

  1. Start the installation assistant ( > Starting the Installation Assistant).
  2. Click on [Save and next] for each step up to the step Battery configuration.
  3. Select the button [New battery configuration].
  4. Select Start new battery configuration in the following prompt.
  5. Set the parameters Type, Voltage, and Nominal capacity to the values of the lead-acid battery connected (see battery manufacturer documentation).
  6. Select the button [Emergency charging] and confirm the following prompt with Start battery emergency charge mode.
  7. The message Emergency charging of the battery can be started appears.
  8. Start the system ( > Starting the System).
  9. Activate the user interface of the inverter ( > Establishing a connection to the user interface).
  10. Log in as Installer ( > Logging In and Out of the User Interface).
  11. Select Battery > Battery > Nominal voltage > Battery voltage.
  12. When the battery voltage has reached at least 45 V, stop the generator.
  13. Switch off the battery inverter.
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Disconnect the generator from connection AC1

  1. Ensure that the generator is stopped permanently.

  2. WARNING

    Danger to life from electric shock due to high voltages

    High voltages are present on the AC power cables and on the control cables. Touching live components can result in death or serious injury due to electric shock.

    1. Disconnect the battery inverter from all voltage sources ( > Disconnecting the Inverter from Voltage Sources).
  3. Remove the bridge between the connections AC1 Loads/SunnyBoys L and AC2 Gen/Grid L.
  4. If a mobile generator is connected, disconnect the generator from connection AC2.
  5. Restore the system-specific connection (see quick reference guide of the used system).
  6. Close the battery inverter ( > Opening and Closing the Inverter).
  7. Connect the circuit breakers and fuse switch-disconnectors for the energy sources.

Restore the original system configuration (not required for single-phase off-grid system)

  1. Switch the battery inverter on ( > Switching on the System).
  2. Activate the user interface of the inverter ( > Establishing a connection to the user interface).
  3. Log in as Installer ( > Logging In and Out of the User Interface).
  4. Transfer the original system configuration from the saved file ( > Adopting a Configuration from a File).

Starting the System

  1. Start the system ( > Starting the System).
  2. Connect the circuit breakers and fuse switch-disconnectors for the loads.
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