Power wire feed from roof?

On my 171, I'd probably bring power down beside the antenna wire; down through the storage over the fridge, behind the fridge and then across under the stove and sink to the convertor.

When I first started to look at solar panels, most were flat and rigid.  They would not install correctly on an R-Pod.  A friend suggested I investigate 'thin-film flexible' panels.  They can be be bent both longitudinally and transversely.  They can run from near the top of the roof down both at the front and back of the Pod, or laid across the roof.  42 watt panels are about 2'x5'. Several brands also feature '3-M weather-proof' adhesive on the back of the panels, so there is no need to bolt the the panels down.
The newest types can still provide some power even if there is a branch shadow over the panel.  Older panels stop generating if even the smallest shadow crosses any portion of the panel!
I thought about using 42 Watt panels because if the panels are bowed to fit the Pod roof some portions of the panels will only receive sun at an angle.  I am planning on installing one panel in front and one in the rear as high as I can fit them up to the AC, etc.
With a maximum of 4-8 amps 12 VDC, I plan on installing a dual feed charge controller adjacent to
the 110VAC-12VDC power panel.