#Solar water heaters can be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel they use -- sunshine -- is free. Passive solar water heating systems are typically less expensive, more reliable and may last longer than active solar water heating systems.
DIY Hot Water - Heating water requires a lot of energy, so it makes a lot of sense to use the power of the sun to heat the water for your home.
If you’ve got good sun exposure on one side of your house, you can take advantage of free heat from the sun with this DIY solar heating panel, which uses old soda cans to collect and transfer the sun’s energy into your house.
My son built this system to heat his hot water No its not solar this the before he added a triaxle of manure ladden bedding free of charge from Local farmer it heats the water to 130 degrees. Might be real pain in the neck when its time to change the compost
Homemade Solar Air Heater (Environmental Engineering): How to create and build a simple solar air heater and heat the air in a room.
The Energy saving solar street lighting system is a self-sufficient, independent lighting system. A solar street light system consists of solar photovoltaic modules, LED Street lamp, light controller, a lamp post and an weatherproof equipment cabinet. Our solar street light is capable of providing 10 to 14 hours of illumination per night
A solar grill developed by Professor David Wilson at MIT allows users to cook emissions-free day or night. The grill uses a Fresnel lens and solar energy to melt down a container of Lithium Nitrate, which acts as a battery storing thermal energy for up to 25 hours. The stored heat can be used to cook at temperatures above 450ºF.