Scenario 1: Device Offline in 4G Mode

1. Check Hardware Connections

1.1 Ensure the 4G antenna is installed and securely fastened.

1.2 Open the SIM card slot to make sure the card is inserted in the correct direction with good contact.

2. Check SIM Card and Network

2.1 Customer-Supplied Card: Contact the carrier to confirm the card has no outstanding balance and data services are activated.

2.2 Customer-Supplied Card/IoT Card: Obtain the correct APN, username, and password from the card provider. Manually configure these parameters via SOLARMAN Business APP > Applications > APN Configuration.

2.3 Verify 4G signal strength at the device location.

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Scenario 2: Unable to connect to network or network configuration fails in WiFi mode

1. Verify permissions and app

1.1 Is the operator a “Plant Creator” or possess “Add Device” permissions?

1.2 Update the “SOLARMAN Business” or “SOLARMAN Smart” app to the latest version.

2. Check WiFi Environment (Critical)

2.1 Ensure the router does not have “5G WiFi” or “Dual-Band” enabled. This device only supports the 2.4GHz band. Have the user connect their phone to the router's 2.4GHz network before retrying.

2.2 Switch to mobile hotspot configuration: Create a 2.4GHz mobile hotspot. Connect another phone to this hotspot for configuration. This step effectively determines whether the issue lies with the device or router compatibility.

Scenario 3: Data Logger or Inverter Upgrade Failure

1. General Troubleshooting

1.1 Change network environment: This is the most common and effective solution. Switch the device's network connection (e.g., from on-site WiFi to a mobile 4G hotspot, or to a more stable WiFi network), then retry the upgrade.

1.2 For inverter upgrades, please check if the firmware package has successfully upgraded on other devices to confirm whether it's an isolated device failure. Record the current version and target upgrade version.

Scenario 4: Data Logger Fails to Communicate with Inverter

1. Check Physical Connections

1.1 Reinsert Cable: Disconnect and reconnect the cable between the Data Logger and inverter to ensure a secure physical connection.

2. Verify Key Parameters

2.1 Confirm Inverter Baud Rate: Ensure it matches the Data Logger configuration.

2.2 Confirm Inverter Address: Ensure it matches the Data Logger configuration.

Note: If communication remains unavailable after completing the above steps, contact after-sales technical support. Provide the following information: problem scenario, Data Logger SN, inverter model, verified parameters, and completed troubleshooting steps.