The power of the sun can be deceiving and anyone using a fresnel lens for solar collection should get in the habit of treating the fresnel lens like a stove furnace or blowtorch.
Fresnel lens solar panel.
Solar concentrators put one of these lenses on top of every solar cell.
Ultimately the cost of solar cell is several times lower than normal capacity which provides maximum benefits to the user.
The largest fresnel concentrating solar power plant opened in 2012.
The 30mw plant near alamosa colorado uses 504 tracking panels each with a 60kw capacity.
A fresnel lens from the front.
When finished with a project store the lens covered preferably in a dark room or closet away from windows that experience direct sunlight.
Concentrators work best when there is a single source of light and the concentrator can be pointed right at it.