How can set up solar charging for my Garmin GPS 60CSx?

Hi this is Clombo I paid half of what they sell it for but still consider it a bust.Unless you sit around for hours in the peak sunshine hours of the day it will not charge anything. Recharged batteries only last a fraction of the hours a lithium aa lasts in my gps so much so that for the weight of 4 rechargeable batteries plus the charger and the Solar Roll with 12V adapter, I can bring enough AA lithiums to power my gps for weeks. My Garmin 60csx runs about 18 hours with regular alkaline AA 12 hours on a rechargeable Aa and 50 hours on a lithium AA that weighs less than half of the two other types, so essentially 100 hours for the same weight. You could charge any device that has a cigarette lighter adapter with it, but you really don't want to carry all that junk with you.Thank you