Solar panels

Does anyone use solar panels to charge their batteries? Looking to buy one and add on the boat. Any suggestions on where to buy one?

I got one at harbor freight it was $15.00 but you need to make sure to get a voltage regulator to put on it I got one down there that went to my solar panel it was $25.00 but it will keep it from over charging.

We use quite a few of them where I work. We got vehicles that sit for weeks without anyone driving them. Of course batteries die. So far they do the job for us.