A solar concentrator diy can seem like the easiest thing in the world if someone else is doing the hard work.
Fresnel lens and solar panel.
Solar power concentrated photovoltaic systems.
A fresnel lens is a lens with multiple refracting planes designed to improve the concentration of light coming from many different angles onto a single point or line.
Fresnel lens using sunlight to heat water in water bottle.
The students pulse pasteurization using a lens and solar energy method uses a fresnel lens which is essentially a large magnifying glass but thinner and lighter in weight and made of acrylic and sunlight to pasteurize water.
A guy who calls himself grant thompson used a fresnel lens from a dismantled old toshiba projection tv and shows the world on youtube how his diy solar concentrator can scorch nearly anything from pennies and concrete to eggs.
Such a lens can focus light on a small spot but does not produce a sharp image.
By concentrating solar power onto solar cells they can increase the amount of sun striking the solar cell and allow a relatively small amount of silicon photovoltaic pv material to be used in large solar panels.