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Is your Fronius inverter no longer producing data? Let’s get that back for you with the PSW Energy Fronius Inverter WiFi Reconnect guide. The great news is that this is often only ever a minor issue. Chances are the solar energy system is still producing power, you simply can’t see this information being logged anymore through the Fronius Solar.web portal.
Important: this post is pending an update. If you cannot reconnect your Fronius Inverter and are a PSW Energy customer, please contact PSW Life Support in the meantime.
Applies to: Fronius Primo & Symo (legacy display) and the newer GEN24 / new Primo & Symo interface.
Estimated time: 5–10 minutes
You’ll need: A smartphone, your home Wi‑Fi name/password (2.4 GHz only), access to the inverter.
Quick start
- Enable the inverter’s Wi‑Fi access point (AP). On legacy units: use the buttons to go Setup → Wi‑Fi Access Point → Activate. On newer units: press the centre button until the red status LED changes to a flashing blue (AP mode).
- On your phone, join the inverter network FRONIUS_240XXXXXX / Fronius_xxxxxx. If prompted, the AP password is usually Solar123 or Psw12345.
- In your browser go to 192.168.250.181.
- Legacy UI: Settings → Network → Internet via WLAN → WLAN Settings → Refresh → select your 2.4 GHz home Wi‑Fi → enter password → Save → ✔ tick to confirm.
- New UI (GEN24 / new Primo & Symo): Menu (≡) → Communication → log in User: Customer / Password: Customer1 → Menu (≡) → Network → WLAN → choose home Wi‑Fi → enter password → Save. Wait until the red LED turns off.
- Reconnect your phone to your normal home Wi‑Fi and resume monitoring in Fronius SolarWeb.
Step‑by‑step: Legacy display (Primo & Symo)
1. Activate the inverter’s Wi‑Fi hot‑spot
- Press the 3rd button (below the screen) to access the menu.
- Go Setup → Wi‑Fi Access Point → Activate Wi‑Fi AP? → Enter.
2. Connect your phone to the inverter
- Phone Settings → Wi‑Fi → select FRONIUS_240XXXXXX.
- Password: Solar123 or Psw12345 (if neither works, contact us).
- Open your browser and go to 192.168.250.181.
3. Tell the inverter your home Wi‑Fi
- In the web page: Settings (right side) → Network (left side).
- Confirm Internet via WLAN is selected (highlighted blue).
- WLAN Settings → Refresh → choose your home Wi‑Fi (2.4 GHz only) → enter your Wi‑Fi password → Save.
- Tap the ✔ tick top‑right to apply.
Step‑by‑step: New interface (GEN24 / new Primo & Symo)
Put the inverter in AP mode
- Check the LEDs: Green (left) = generating, Red (right) = not connected to Wi‑Fi.
- Press the centre button until the red LED changes to a flashing blue (AP mode).
Connect your phone and open the local page
- Join the network Fronius_xxxxxx (AP password Solar123 or Psw12345).
- Open 192.168.250.181 in your browser.
Log in and set Wi‑Fi
- Tap Menu (≡) → Communication and log in: User: Customer / Password: Customer1.
- Open Menu (≡) → Network → WLAN.
- Choose your home Wi‑Fi, enter the password, then Save.
- Wait for the red LED to turn off—that confirms Wi‑Fi is connected.
Finish up
Reconnect your phone to your usual Wi‑Fi and continue monitoring via Fronius SolarWeb.
Troubleshooting & tips
- “No Internet” warnings on phone: Safe to ignore while connected to the inverter’s temporary Wi‑Fi.
- Can’t see the FRONIUS/Fronius network? Stand closer to the inverter and re‑enable AP mode (legacy: Setup → Wi‑Fi Access Point → Activate; new UI: press centre button until blue LED flashes).
- Wi‑Fi not accepted: Ensure you’re choosing the 2.4 GHz version of your home network name if your router broadcasts both 2.4 GHz and 5 GHz.
- Login issues (new UI): Use User: Customer / Password: Customer1. If that doesn’t work, contact us for assistance.
Frequently asked questions
Look for FRONIUS_240XXXXXX (legacy) or Fronius_xxxxxx (newer units). The AP password is usually Solar123 or Psw12345.
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Type 192.168.250.181 into your phone’s browser while connected to the inverter’s Wi‑Fi.
No—use the 2.4 GHz band for a reliable connection.
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On the new interface, the red LED turns off once Wi‑Fi is linked. On legacy units, your chosen Wi‑Fi turns blue in the list and saving with the ✔ tick completes the process.