This is the case for the inverter SUN2000-2-6KTL-L1 or "Master" invertor with Dongle WLAN-FE installed
First, connect to the inverter via FusionSolar/SUN2000 APP.
Log in to the app as an installer. On the home screen, tap "Settings"
Tap on the "Communication configuration" tab
Then tap on "Router connection settings" tab
Tap on drop down "WLAN" button to choose/change the WI-FI connection that you need, enter the password, and tap on "Connect" button
Dynamic Host Configuration Protocol (DHCP) is a network protocol used to automate the process of configuring devices on IP networks
When DHCP is set to "ON" mode, the IP address, Subnet mask, and Gateway of the solar inverter are automatically allocated.
When DHCP is set to "OFF" mode, you can manually set the IP address, Subnet mask, and Gateway.