Gen 2 WiFi question

Go gentle on me, new starter.
I've got a Gen 2 inverter, connected wirelessly and as luck would have it, my router packed up the day after. I have a spare and I could just rename the SSID/password to match my original but how do I reset the Wifi connection details on a Gen 2 inverter?
I gather the Gen 1 you take out the dongle, insert into a pc and admin from there but I'm assuming on a gen 2 you instead connect wirelessly to it's own WiFi network? I think I see it but where would the password details be kept?
Once connected, where what address would I navigate to?

Sorry. I'm sure these are obvious questions!

lam22 rename the SSID/password to match my original

Just do that on the replacement router and the dongle won’t know that a change has been made no need to do anything with it.

Cheers Tim a very pertinent bit of advice and info. Still a newbie and my broadband is to be upgraded to FTTP soon so I now know how to cope with the change of router. Thanks

Thanks!

Or run a LAN cable to it

Does any body know how to change the SSID on a brand new Vodafone FullFibre router etc to allow an installed and working Gen 2 inverter with an enclosed dongle?

https://www.bing.com/search?q=vodafone+full+fibre+router+change+ssid&cvid=a061db581cfb48e2969c333cc5b4b44e&aqs=edge..69i57j0l8.16829j0j1&pglt=675&FORM=ANNTA1&PC=EDGEDSE