These are really quite useful for a small boat. If you are running anything that draws more power than a simple fish finder, you might only have a couple hours of power available while you’re on the lake. We purchased two of these and frankly they have come in handy. We use this in conjunction with our Minn Kota Power Center to provide a small trickle charge while out on the water, or while camping.
A simple and small investment for a little extra time on the water or for some charging when normal means aren’t available.