“DIY Solar Water Heater. A Homemade “flat panel” COPPER COIL Solar Water Heater. Easy DIY. Full Instructions. Super hot temps (sustained at 165F+). Fast hot water. No electricity needed. Easily hooks up to standard water tap/garden hose. Reaches temps well over 150F (water pasteurization temp) so it works to clear/kill any pathogens (if a non-municipal source is used). It’s super portable so it’s good for camping/off-grid/emergency as well as everyday use.
“It takes a lot of energy to heat water. Typically, up to 30% of a home’s energy consumption is used just to heat water for bathing, laundry, and cleaning. By installing a solar hot water system, homeowners can shave 200 to 500 kilowatt-hours off their electric bill per month, saving money and reducing pollution. Installing a solar hot water system is typically the first and most cost-effective step when turning to the sun for energy. Even if a photovoltaic system is your primary interest, a solar (thermal) hot water system along with a PV system will provide the best economics and space-efficiency on your roof.”