Because I ran ethernet directly to the charger and because I have a WiFi access point directly overhead in the garage, I enabled both Ethernet and Wifi from day one. I have the network config for each set to DHCP, and then in my UniFi UDM Pro-SE I went into the IP settings for each connection and marked them as "Fixed IP Address", so the address each connection got assigned would be permanent. This is important so you can bookmark the webpage for each (Ethernet and WiFi). That way even if the Network equipment gets rebooted, those two connections will always get the same IP addresses, in my case 192.168.0.98 (Ethernet) and 192.168.0.221 (WiFi) and those saved bookmarks will always navigate to the correct webpage inside the Lucid Charger.
When I snapped the attached pictures of each of the webpages, I was connected to both at the same time with no problem.
One issue many people have in their garages is a weak WiFi signal. If that's the case, then you could either run Ethernet from your network switch to the Lucid Charger, or at least make sure you have a really good WiFi signal in the garage by adding a WiFi access point, which would run from your router to either the wall or ceiling in your garage (your Lucid would benefit from this as well because it would connect through this same Access Point).