Absolutely, solar powered showers, just like solar-powered technology in general works and is an incredibly popular and environmentally friendly solution. The usage you will get though is determined by the amount of exposure to the sun that you are able to access prior to use. It also depends upon the size of the water bag or tank that you have versus the time exposed to the sun, as to how long it could potentially take to heat up that water so that it’s a comfortable temperature. Probably when you are showering in the great outdoors, any shower is better than no shower so you may well be more than satisfied with a lukewarm water affair! However, if you are one of those campers who still like to maintain some of their home from home comforts can can’t bear the idea of having anything other than a warm shower, then you might want an alternative heat source rather than the sun. Other options include electricity or a form of heated gas. These are going to be more cumbersome and expensive, but if a hot shower is what you prefer, they will be more reliable than solar power. Unless you are camping of course in Nevada!!\r