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# Solar Turbines: What Would Be The Cost Of The Solar Cells Needed For A 750MW Plant In A Region Where The Intensity Of The Sunl? (8/24/2011)

current commercial silicon solar cells cost as little as 25cents per square centimeter and can convert sunlight into electricity with at least 10% efficiency. it currently cost about \$ 150,000,000 to build a 750MW coal fired electric power plant. What would be the cost of the solar cells needed for a 750MW plant in a region where the intensity of the sunlight is 900W/ square mi?

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{ 3 comments… read them below or add one }

ron853211 August 24, 2011 at 1:53 am

It is just multiplication and division – shame on you…

Sun provides 900w/m^2, so a 10% efficiency means you get 90w/m^2 with solar panels… So a cost of .25/cm^2 means you have to figure out how many cm^2 are in a m^2, which is 10,000 cm^2 per m^2.

So the first calculation is rather simple – \$ .0025*10,000cm^2 = \$ 25/m^2.

\$ 25 per square meter sounds about right, and each square meter provides 90w. It is just a division away, and you should be able to do it…

Good luck…

tick tock August 24, 2011 at 2:45 am

900W / m^2 not per square mile.

here’s a thing, if someone DID decide to slap together a power plant like that, the cost of those cells would surely drop.