Solar power from the Underground - Principle










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Daylight concentrator as one of the lighting variations 







Flexible light-conducting PMMA film
as a substrate for solar cells
 
 
 
 
 

One of many embodiments
Here: narrow band
 
 
 
  
 

Finished single-element
 
 
 
 
 
 

Solar cells stacked
 
 
 
 
 
 

Possible light supply element
 
 
 

 
 

Unilateral illumination option
 
 
 
 
 
 

... and double-lighting option