Need to map the space on the roof to see what fits. Panels need to be away from other items to avoid even partial shading fron vents, air conditioner, antennas etc. Probably you are looking for 100 to 300 watts of solar. I assume you have at least two batteries and a small inverter to run the tv. Also consider LED interior lights to compliment the system with conservation.
Here are some panels to look at to measure and see what fits:
http://www.solarblvd.com/12v Solar-PanelsHere are some other systems to look at with pics:
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