We have been told by our many sailing customers that the S14 solar charger keeps tablets, phones, satellite phones and navigation devices charged. Some have urged us to tell other sailboat owners as well. What would happen if your cabin power failed in the middle of the ocean or unfamiliar waters? The S14 solar charger could be a lifesaver. It is an absolute requirement. The S14 is very rugged and corrosion resistant so you can rely on it.