This 60W solar panel only has about 52% efficiency on the brightest clear day at around 100°F, the solar panel drew a maximum of 32W, stable at 31W. Bleached. Overall, this isn't a bad solar panel, but I'd be happier if the efficiency was higher, around 70%. Around 41-42W. The overall size is quite compact, making it ideal for travel and camping. I would recommend going with 100W if your system allows for higher input. I have used it as a solar generator for my 250 jacket but it cannot be used to attach to your RV.