Solar panels aren't efficient enough to keep up with the power draw. If they were, you could buy a solar powered trolling motor. The guy I bought my new rig from, used one on top of his garage for charging the batteries ( 2 12 volts wired in a series ). It was the only charging system he used. Now with the windmill technology our new pres. is pushing, we might do better to put one or two of those babbies on our boats and see what happens!!! LOL see ya Scott.