Residential water heating with Fresnel lens

=== France ===
* http://wims.unice.fr/xiao/solar/diy.html and http://wims.unice.fr/xiao/solar/index.html 
* http://wims.unice.fr/xiao/solar/storage.html
Use http://www.patentstorm.us/patents/6971756.html for troughs from SolarLinks svvti.com instead of the usual parabolic troughs. It is patented but in South-Africa this isn't a problem as described under HackPatents. 
SolarLinks#Reflectech is used to provide a mirror surface.
* This link http://wims.unice.fr/xiao/solar/diy.html
Category:Sasecurity
Category:Fresnel lens