Identify roof box

[CXRAndy]

I was on a dual carriageway, when I was approaching this odd looking vehicle. It looked like a car with rocket boosters on the roof from behind. As I neared I realised it was a Tesla model 3 with some roof box that went from the front screen and wrapped down the rear screen and mounted over the boot lid.

I couldn't take a picture as I was driving, I did notice that it said something like roof room or something like that, small label on the side of it.
Fascinated to know what it actually is

 

[MontyVeda]

I was on a dual carriageway, when I was approaching this odd looking vehicle. It looked like a car with rocket boosters on the roof from behind. As I neared I realised it was a Tesla model 3 with some roof box that went from the front screen and wrapped down the rear screen and mounted over the boot lid.
...

I'm baffled by this... that'd make the boot inaccessible wouldn't it?

 

[Jameshow]

Was it advertising something?

 

[stephec]

And probably illegal as well if it's obstructing the view out of the rear window.

 

[CXRAndy]

I'm baffled by this... that'd make the boot inaccessible wouldn't it?

It would look like it. Two wide moulded brackets wrapped all the way down under the rear bumper.

Never seen anything like it, it could be custom design

 

[CXRAndy]

And probably illegal as well if it's obstructing the view out of the rear window.

Its a Tesla so they can have rear camera on all the time

 

[CXRAndy]

Was it advertising something?

Apart from a small label on the side it was very plain coloured, dark grey

 

[gbb]

Wasn't a roof mounted solar panel was it ?
(I had no idea, just googled Tesla roof box and saw the panels, they drape over the rear window)

 

[CXRAndy]

Maybe post some pictures so I can jog my memory

 

[Venod]

Its a Tesla so they can have rear camera on all the time

I was loaned a Polestar 4 while they serviced our Volvo XC40, no rear window just a camera.