Selecting solar battery maintainers
I am thinking of buying g a solar battery maintainer so the battery is ready to go when we want to go. We own a Jay Feather 7 19XUD (think small). I have looked at "SUNER POWER 12V Solar Car Battery Charger & Maintainer - Portable 6W Solar Panel Trickle Charging Kit for Automotive, Motorcycle, Boat, Marine, RV, etc." They also have a 2.4 W , 12 W, and 14 W. I am not electrically knowledgeable and I am assuming the W stands or watts.
Any explanation or help would be appreciated.