[DFrantz]

I'd be pretty surprised if there was a custom fit panel. Further, any change to the roofline might well offset quite a bit to aerodynamics over the gains in solar energy gathered. So it can be hard to actually get improvements. On my XC70 it was already behind a basket so aero was already quite spoiled, and I just have it to help keep the battery charged up from when I wasn't using the XC70 as a daily.

 

[DFrantz]

Thanks for that. I wonder with that particular size, have you gotten some kind of measure in how fast it helps top the battery?

I have not. It's not very much though. I have one set up for an ham radio that gets used once a week and it keeps up with that. I think it makes less than I'd want. I have a crazy busy life and thousands too many projects to sit down and get good at something like testing how effective cheap ebay solar panels are, but I'd be someone has a youtube video on it.