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DIY Solar thermal water heater..................... You tube. FAR better description than most. Very well done and good looking design. .................. Building a Water Heating Solar Panel.wmv - YouTube

"This option is small-scale and it is built around a reclaimed heat dispersal system from an old refrigerator (which you can get with the gas removed from your local dump). It has no pump as it is gravity fed and it requires no electricity to work. Just put it in the sun, turn on the water feed and you will get a slow but constant supply of very hot water..."

from TreeHugger

IBM solar collector magnifies sun by 2,000x (without cooking itself), costs 3x less than similar systems

Source: Original Post Date: March 2014 -  A team at IBM recently developed what they call a High Concentration Photo Voltaic Thermal (HCPVT) system that is capable of concentrating the power of suns, they are even claiming to be able to concentrate ener

from 22 Words

Solar panels made of pop cans heat homes at almost no cost

from Gizmodo

Solar Panel-In-a-Tube Generates Power and Hot Water At the Same Time

Solar Panel-In-a-Tube Generates Power and Hot Water At the Same Time Solar photovoltaic cells and solar thermal collectors both capture the sun's rays. The first one turns the light into electricity, while the other turns it into hot water for heating. They usually battle for rooftop real estate, but Naked Energy has found a way to merge them both into a single solar solution.