Applies to: All SAJ WiFi-enabled inverters using either the eSolar WiFi-D or eSolar WiFi-2 communication module. This covers the R5, R6 and C6 on-grid series, and the H1, H2 and HS hybrid / all-in-one storage series.
Estimated time: 10 minutes.
You will need
- The eKeeper app installed and logged in on your smartphone (see app note below)
- Your home WiFi network name (2.4GHz) and password
- Physical access to your SAJ inverter and its WiFi module
If your SAJ inverter has stopped showing data in eKeeper or on the eSolar Portal, your system is almost certainly still generating power. The fault is in the WiFi communication path, not the inverter itself.
Before you start
- Confirm your home WiFi is working on another device.
Make sure your inverter is powered on. The OLED screen on the WiFi module should be lit (see the LED/display reference below).
Stand within a couple of metres of your inverter; the WiFi module’s hotspot has a limited range.
On your phone, temporarily disable mobile data. This prevents your phone from silently switching to mobile data during the setup process, which can interrupt the configuration.
1. Reconnection steps using the eKeeper app
1.1.
Open the eKeeper app on your phone and sign in.
From your plant’s dashboard, tap the settings or device icon and select your communication module (sometimes labelled Datalogger or shown by its serial number, e.g., DTU:XXXXX).
Tap WiFi Configuration or Reconnect WiFi (exact wording depends on app version).
1.2.
The app will now show the WiFi configuration page. A list of nearby WiFi networks will appear.
Select your home 2.4GHz WiFi network from the list. If your network does not appear, tap Refresh or type the name manually.
Enter your home Wi-Fi password carefully (case-sensitive).
Leave DHCP set to ON (this is the default — it tells your router to assign an IP address automatically).
Tap Save Configuration.
1.3.
Wait 30–60 seconds. The app will confirm the connection. The OLED screen on the inverter’s WiFi module should also update to show a successful connection.
Reconnect your phone to your home WiFi, then open eKeeper to check that live data is appearing. Data upload can take up to 15 minutes to resume after reconnection.
2. Alternative: browser-based setup
If the eKeeper app flow fails, the SAJ WiFi module has a built-in web interface as a fallback:
2.1.
On your phone or laptop, connect to the module’s WiFi hotspot (DTU:XXXXX, no password).
Open a browser and navigate to http://10.10.176.1.
2.2.
Log in with admin/admin.
From the menu, select your home WiFi network, enter the password, and click Save.
The module will restart and connect to your home network.
SAJ WiFi module display reference
SAJ modules have a small OLED screen (not just LEDs) that shows the current connection state. Operate it using the button on the module:
- Single click: scroll through status pages
- Double click: return to main interface
- Long press: confirm a selection
The main status pages you may see:
| Display shows | Meaning |
|---|---|
Connected to router + connected to server | Fully online. Normal operation. |
Connected to router + disconnected from server | Wi-Fi working, but cannot reach SAJ cloud. Check your internet. |
Disconnected from router | Not connected to home Wi-Fi. Run the reconnection above. |
Black screen | Screen has entered sleep mode after 40 seconds of inactivity. Single-click the button to wake it. |
If it does not work
The DTU:XXXXX network does not appear in WiFi settings
Stand closer to the inverter. Turn your phone’s WiFi off and back on. On the module itself, press the button to confirm the OLED is active, if it is in black screen mode, the hotspot may have gone idle.
WiFi password rejected during configuration
Double-check capitalisation, SAJ modules are strict about case. If you recently changed your home WiFi password, make sure you are using the new one.
Module shows "Save Configuration" success but inverter stays offline
Wait at least 15 minutes for data upload to catch up. If still offline after an hour, perform a factory reset on the WiFi module: long-press the button until the OLED shows “Are you sure to reset?” then long-press again to confirm. The module will reboot with default settings and re-run the configuration steps above.
Cannot log in to eKeeper
If you only have an eSolar Home account, create an eKeeper account using the same email address. Your plant data should migrate automatically. If you are a PSW customer and have never been able to log in, contact PSW Life Support, and we can link your system to your account.
WiFi compatibility: common issues in Perth
2.4GHz vs 5GHz bands
SAJ WiFi modules connect on 2.4GHz only. If your router broadcasts a combined 2.4/5GHz network, the module may fail to connect.
Fix: Split the bands in your router admin, or temporarily disable the 5GHz band during configuration.
Signal strength
SAJ inverters are often installed in less-than-ideal locations for WiFi (garages, eaves). If the signal is weak at the inverter, the module may connect intermittently but drop out frequently.
Fix: Add a Wi-Fi extender or mesh node. Alternatively, SAJ offers the eSolar WiFi/LAN module which provides wired Ethernet — contact PSW Life Support if you want to switch to wired.
App confusion
We have seen customers stuck using the wrong app. If you have multiple SAJ apps on your phone, the correct one for residential monitoring is eKeeper. You can delete eSolar Home once eKeeper is set up. eSolar O&M is for installers only.
When to contact PSW Life Support
Contact us if:
- The
DTU:XXXXXhotspot does not appear after multiple attempts and a factory reset - You cannot log in to eKeeper and do not know which account your system is linked to
- The inverter’s OLED display is blank and does not respond to the button
- Data does not return to eKeeper within 24 hours of successful reconnection
- Your inverter is showing any fault codes (not just a monitoring issue)
Phone: (08) 6171 4111
Email: hello@pswenergy.com.au
Online: Lodge a support request at PSW Life Support
Have ready: your inverter serial number, the DTU (WiFi module) serial number shown on the OLED, and a note of what happened when you tried the steps above.
