Traveling with Inogen Stationary Concentrator

Hi there. I use the Inogen Rove 6 portable pulse concentrator when I'm out and about and need O2 (I typically need it if I get sick, during recovery, and during strenuous exercise). I'm thinking about purchasing the Inogen stationary concentrator for when I travel to another country where obtaining a stationary O2 unit will be a hassle. That way, I can still use the portable while sightseeing and have the stationary at my airbnb for use at night, etc. This unit weighs 18 pounds and will fit in a carry-on. Has anyone else tried this? I'm hoping it will free me up to travel to Europe from the US again.