Applies to: All GoodWe systems with built-in Wi-Fi, including the DNS, SDT, DT, MS, ET Hybrid, EH Hybrid, ES, ESA, BH, BT and EM Hybrid series. If your system includes an EzLogger Pro (WiFi version), the same process applies to that datalogger.
Estimated time: 5–10 minutes.
You will need
- The SEMS Portal app installed and logged in on your smartphone (or SolarGo for newer models, see note below)
- Your home Wi-Fi network name and password
- Physical access to your GoodWe system
Which app to use?
GoodWe has two apps. SEMS Portal is the long-standing homeowner monitoring app and handles Wi-Fi reconfiguration for all common GoodWe inverters installed by PSW. SolarGo is the newer local-commissioning app, used primarily by installers and for some newer hybrid models. For most customers reconnecting after a router change, SEMS Portal is the right app. This guide uses SEMS Portal as the primary method, with SolarGo notes where relevant.
If your inverter has stopped sending data to SEMS Portal, your system is almost certainly still generating power. The only thing affected is the data connection to GoodWe’s cloud monitoring service.
Before you start
- Check your home Wi-Fi is working on another device.
Stand within a couple of metres of the inverter; the inverter’s Wi-Fi hotspot has a limited range.
Make sure your inverter is powered on.
Confirm you have the latest version of the SEMS Portal app installed. Older versions have a different Wi-Fi configuration flow.
Reconnection steps using the SEMS Portal app
1.
Open the SEMS Portal app on your phone.
You can do this from the login screen (tap WiFi configuration) or from the home screen (tap the WiFi icon at the bottom of the screen).
2.
Make sure your inverter is powered on, then tap Next.
If a pop-up appears asking you to acknowledge the process, tap I am aware of that to continue.
3.
Tap Go to WLAN setting interface. The app will redirect you to your phone’s Wi-Fi settings.
In your phone’s Wi-Fi list, find and connect to the inverter’s local network. It will be named Solar-WiFi followed by a string of numbers (e.g., Solar-WiFi12345678). The numbers are the last eight digits of your inverter’s serial number.
When prompted for a password, enter 12345678 and tap Connect. Your phone may warn that the network has no internet, this is expected.
4.
Return to the SEMS Portal app. Tap Next.
You will be prompted to select a router. Tap the dropdown and the app will list nearby Wi-Fi networks. Select your home Wi-Fi network.
Enter your home Wi-Fi password in the Password field.
5.
Leave DHCP set to ON (this is the default and is correct for nearly all home networks).
Tap Set. The app will configure the inverter with your new credentials. This can take 30–60 seconds.
Once a success confirmation appears, tap OK.
6.
Return to your phone’s WiFi settings and reconnect to your home network. Open the SEMS Portal and check your dashboard; the data should return within a few minutes. Some historical data backfill can take up to 24 hours.
GoodWe WiFi LED indicator
Most GoodWe inverters have a WiFi indicator on the front panel that tells you the connection state at a glance:
| LED state | Meaning |
|---|---|
Solid on / fast blinking | Connected to your home Wi-Fi and uploading data to SEMS Portal. This is what you want. |
Flashing 4 times, pause, repeat | Connected to the home router, but the router is not reaching the internet (or cannot reach GoodWe’s servers). Check your internet is working. |
Slow blinking | Not connected to any Wi-Fi. Run through the reconnection steps above. |
Off | Wi-Fi module is not active. Power-cycle the inverter (turn off AC and DC isolators, wait one minute, restart). If the LED remains off, contact PSW Life Support. |
If it does not work
Solar WiFi network does not appear in the phone's WiFi list
Stand closer to the inverter. Turn your phone’s WiFi off and on again to refresh the scan.
If still not visible, the WiFi module may need a reset. Press and hold the WiFi reset button on the module for a few seconds (location varies by model). If unsure, PSW customers should contact PSW Life Support.
Solar WiFi password 12345678 rejected
This default rarely changes, but some installers do set a custom password.
PSW customers: If the default does not work, contact PSW Life Support.
Success message appears but inverter stays offline
Wait at least 15 minutes. Data upload can be slow after reconnection. If it has been over an hour with no data, perform a “WiFi reset and reload” on the WiFi module and repeat the configuration steps.
If the router shows the inverter as connected but the SEMS Portal still shows it as offline, the issue is likely on the Goodwe server side. Check the SEMS Portal status page, or PSW customers should contact PSW Life Support.
Password rejected or WiFi won't connect to home network
Most common cause is 2.4GHz vs 5GHz band issues. See the next section.
WiFi: common issues in Perth
2.4GHz vs 5GHz bands: GoodWe Wi-Fi modules only connect to 2.4GHz networks. They cannot see 5GHz bands. If your router combines both bands under a single name (common with Telstra Smart Modems, NBN-supplied routers, and Optus routers), the GoodWe module may fail to connect.
Fix: Log in to your router’s admin page and either split the bands into two separate network names, or temporarily disable the 5GHz band while you configure the inverter.
Signal Strength: GoodWe inverters are often installed in garages or on external walls at some distance from the main router. A weak signal causes intermittent dropouts even after the initial connection succeeds.
Fix: If your phone shows 1 or 2 Wi-Fi bars at the inverter, the signal is too weak for reliable operation. Options:
- Move the router closer (rarely practical)
- Add a Wi-Fi extender or mesh node positioned between the router and the inverter
- Use a LAN (Ethernet) connection. Most GoodWe inverters support wired Ethernet via a LAN Kit communication module. A wired connection is the most reliable option, but it comes with additional costs.
Port configuration: GoodWe inverters need outbound access on specific ports to reach the SEMS Portal servers. If your home network has strict firewall rules (unusual on residential setups but occasionally an issue with business-grade routers), make sure ports 80, 443, and 10000 are open for outbound traffic.
Setting up monitoring for the first time after install
If this is a new installation and you are setting up monitoring for the first time, rather than reconnecting, you will also need to create an account on SEMS Portal and associate your inverter’s serial number with your account. Your installer usually does this during commissioning. If your account is not linked, contact PSW Life Support with your inverter serial number — this is a quick admin step.
When to contact PSW Life Support
Contact us if:
- The Solar-WiFi hotspot does not appear after power-cycling the inverter
- The
12345678password is rejected - Data has not returned to SEMS Portal within 24 hours of a successful reconnection
- The Wi-Fi LED remains off even after a full power cycle
- Your inverter is showing any fault codes (not just a monitoring issue)
- You are a new customer and cannot see your inverter in SEMS Portal at all
Phone: (08) 6171 4111
Email: hello@pswenergy.com.au
Online: Lodge a support request at PSW Life Support
Have ready: your inverter serial number (on the label on the side of the inverter), the current state of the Wi-Fi LED, and a note of what happened when you tried the steps above.
