The number of solar panels needed to power an RV depends on various factors such as energy consumption, available roof space, and desired power capacity. Generally, at least 2 solar panels for RVs, ranging from 100 to 400 watts each, are needed for a basic essentials. However, for larger power needs or increased energy independence, you will need more more solar panels for your RV. 

Made of high-quality materials, this 200 solar panel will still produce power during overcast conditions, although power conversion is not as high as on sunny days.

Generally, rigid solar panels require little maintenance. However, if you notice dirt on the surface, the conversion of sunlight will be affected, resulting in lower efficiency. If this happens, you can simply hose them off with water or wash them using mild soap and a soft brush.