Cannot Connect the Growatt EV Charger to Wi-Fi

Possible solutions:

1. Wi-Fi band:

   • 2.4 GHz only: Make sure the router is providing a 2.4 GHz network. Many devices, including some Growatt EV Charger configurations, do not connect via 5 GHz.
   • Channel selection: Choose a less congested 2.4 GHz channel where possible to reduce interference.

2. Wi-Fi settings:

   • SSID and password: Carefully check the Wi-Fi network name and password, including upper/lower case and special characters.
   • Security protocol: Make sure the Wi-Fi security setting is compatible with the charger, for example WPA2-PSK. Avoid obsolete protocols such as WEP.

3. Hardware and router:

   • RS485 bus: Disconnect the RS485 bus from the Growatt EV Charger during Wi-Fi troubleshooting, as this connection is intended for other communication functions.
   • Wi-Fi module: Check that the Wi-Fi module is installed correctly and seated securely. A defective module can occasionally cause connection problems.
   • Router settings: Check that settings such as MAC filtering are not blocking the charger.

4. Interference:

   • Electromagnetic interference: Keep the charger and router away from strong interference sources and avoid shielding by large metal surfaces where possible.
   • Physical obstacles: Thick walls and other obstacles between charger and router can weaken the signal.

5. Software:

   • Firmware: Check whether newer firmware is available for the Growatt EV Charger. Updates can resolve errors and improve Wi-Fi stability.
   • App version: Make sure you are using the latest Growatt app version.

Additional tips:

• Wi-Fi signal strength: Check signal strength at the charger's installation location. A weak signal can cause unstable connections.
• Restart the router: Restart the router after changing Wi-Fi settings so the changes are applied cleanly.
• Temporary interference: Temporary Wi-Fi problems can interrupt the connection. Wait a few minutes and try again.