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solar generators
Why is solar energy generators are so costly (India)?
When the whole world is speaking about global warming, extinction resources like charcoal for electricity why is the Solar energy generating equipments are so costly ? It roughly takes 15000 INR for 1 fan, 1 tube light, 5 9W CFL bulbs for 1 hour back up.
Solar energy itself may be considered clean and easy to harness, but the materials needed to transduce sunlight into electricity are very expensive.
http://en.wikipedia.org/wiki/Solar_cell
http://en.wikipedia.org/wiki/Refined_silicon#Purification
Silicon wafers, needed to produce solar cells, are difficult to manufacture. The silicon must be of high purity, which is achieved by a lengthy and expensive process.
There are other possible ways being researched, such as polymer solar cells that don't require silicon.
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