Before You Begin
This guide covers connection via the inverter's Wi-Fi dongle over your home network. The dongle can only maintain one network connection at a time. When your Sourceful ZAP gateway connects to the inverter, the connection to Solis Cloud will be interrupted.
The Solis mobile app will not receive data while the ZAP is connected
Use the Sourceful Energy app to monitor your system instead
This is expected behavior and not a fault with your setup.
Requirements
Solis hybrid inverter with Wi-Fi dongle installed
Sourceful ZAP gateway
Both devices connected to the same home network
Step 1: Find Your Inverter's IP Address
Your inverter receives an IP address from your router. To find it:
Open your router's admin interface (often at 192.168.1.1) or use your router's mobile app
Look for a device named "Solis" or similar in the list of connected devices
Note down the IP address (e.g., 192.168.1.45)
Step 2: Set a Static IP Address
This step is essential. Without a static IP, your router may assign a new address to the inverter after a restart, causing the ZAP to lose its connection.
Open your router's admin interface or mobile app
Find the DHCP or IP reservation settings
Locate your Solis inverter and reserve its current IP address
Most modern routers make this easy through their companion app. Consult your router's documentation if needed.
Step 3: Add the Inverter in the Sourceful Energy App
Open the Sourceful Energy app
Select Add new energy device
Choose Inverter, then select Solis
Enter the static IP address you configured
Continue to complete the setup
Connection Details
Your ZAP uses these default Modbus TCP settings to communicate with the inverter:
Protocol: TCP
Port: 502
Unit ID: 1
Troubleshooting
Connection Problems
If the ZAP cannot connect to your inverter:
Confirm the inverter is powered on
Verify both devices are on the same network
Ensure no other devices are using the Modbus TCP connection
Check that port 502 is not blocked by your router
Solis App Shows No Data
This is normal when the ZAP is connected. Use the Sourceful Energy app to monitor your system.
If you temporarily need the Solis app, disconnect the ZAP from the inverter in the Sourceful Energy app settings.
Testing Connectivity (Advanced)
You can follow our [testing guide] to verify the connection manually. For Solis inverters, use port 502 and Unit ID 1.