I'm just taking a look at the wiring schematics here, the solar panel has its own control module J355 which connects to the blower control module J126 via pin 6 on its connector. I'm not sure of locations for these controllers but I'd guess they're near the aircon controller and sunroof controller.

3 hours ago, Tech1e said:

I’d be very surprised if the panel fed directly to the blower motor. 

Well I'm not getting any error codes on anything, all fuses are correct and working and I can't see what else would be in the circuit. It has to work when the ignition is off. I got one of these PDF manuals that I purchased on line and it just seems odd to me that there is not any mention of the solar panel or any reference to a wiring diagram for the entire car?

13 minutes ago, Graham Butcher said:

Well I'm not getting any error codes on anything, all fuses are correct and working and I can't see what else would be in the circuit. It has to work when the ignition is off. I got one of these PDF manuals that I purchased on line and it just seems odd to me that there is not any mention of the solar panel or any reference to a wiring diagram for the entire car?

The official service manual is actually a large collection of PDFs covering different parts/systems. The pdf for the electrical schematics alone runs to nearly 5500 pages. Stuff is generally cross-referenced within and between the manuals but it takes a little time to figure out what's going on.

 

If you want the official Skoda manuals, subscribe at https://erwin.skoda-auto.cz/erwin/showHome.do and download them. A 24 hour subscription is more than enough to get a good look around and download everything you need. It's about €30 for the 24 h sub, less than a tenner for an hour.