Dashboard and iframes card

Hi all

I have a solar installation from victron. I can access to my device by typing its ip address in my webbrowser. This will be http://192.168.0.XX

My home assistant is working in https. I use duckdns and nginx. I can access to my home assistant from outside with the https address and also locally with the http address.

If I use an iframe card on my dash board with the address of my victron device, I can only access it locally. I get an error message that a http iframe cannot be accessible if home assistant use a https protocole.
Is there any way to get access to a local ip address with an iframe card?