The amount of energy wasted to heat water is staggering, for most, hot water heaters idle away heating water that will only be used a few times a day. Think about it, in a 24 hour period you take a show, wash dishes, maybe wash your hands here and there, but otherwise a tank full of water is being heated, for what? All the while the sun’s energy is being wasted to heat a few shingles on your roof. This article can show you have to marry the two, lower your energy bills, save the environment, and give you a hot shower in SHTF. Check out: