For sure drilling the roof is last resort.
Safely run wires thru rv roof.
The installer ran the wires without properly sealing them and without leaving an option to add future wires.
If you run the conduit cables over the side of the roof or down over the gutter that seems to be pretty ugly.
Barring that you can run the wire down the vent and tap into the actual pipe down where you can route it to your charge controller while sealing up the pipe.
Pop the cap off your grey or black tank vents and see if theres room to fish your wires next to the pipe.
The proper sealant depends on your roof material so if you re not sure which type you need check with your rv dealer or manufacturer first.
How do you keep wires hidden in your rv.
First drill holes in the side of the box for cables big enough to fit the threaded end of the cable gland make sure to leave room for future cables.
Screw the panel to the roof.
Insert the weatherproof cable glands and tighten them down.
Camper exterior walls are not hollow and therefore it s often difficult or impossible to run hidden wire through exterior walls.
Inside microwave compartment where wires enter trailer from roof top running wires inside.
If using brackets apply a sealant under each bracket to create a water tight seal.
Secure the panel to the roof.
Heat is not our friend when dealing with electricity.
If you have ducted air conditioning in the ceiling of your camper wire could be fished through those ducts.
Do not run wires through heating ducts.
From the rooftop combiner box i ran 4 awg wire into the trailer through a hole cut in the roof through the microwave compartment down along the side of the refrigerator and into the area where the solar controller would be mounted.
Run the cables through the roof access the next step is to run the solar or antenna cables into the rv through the new access hole.
In this video we install a roof mounted wiring box with waterproof cable glands.