Question about Victron Energy Cerbo GX

You can, for example, use a repeater and configure it as a WLAN client and then connect it to the Cerbo via LAN.
This can be cheaper and you are flexible with the location of the "WLAN receiver".
(e.g. with the Fritz! repeaters - but not the 600s! or the WLAN extenders from Swisscom, if an InternetBox is available)

Yacht router from Yavhtrouter.com. Very expensive, but Plug&Play

Hello!

Unfortunately, I don't think it exists. In any case, Victron doesn't say anything about it and I haven't found anything despite searching.

I found it myself in the manual:
There are several supported USB WLAN dongles. Two of them are also available from stock at Victron Energy:
- Part no. BPP900100200 - CCGX WLAN module simple (Nano USB), small, inexpensive.
- Part no. BPP900200300 - Asus USB-N14, slightly higher cost and also better reception than the Nano USB. Supported since software version 2.23.
- Part no. BPP900200400 - WLAN module with long range (Netgear AC1200) - higher price, but also better reception than the Nano USB. Wireless AC, Wireless G and Wireless N; 2.4 Ghz and 5 Ghz.