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Archive for December, 2009

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How much does solar power cost?

By admin on Wednesday, December 9th, 2009 | 3 Comments

like how much does it cost per joule or kilo joule?? im doing a project in science, but i can’t seem to find it anywhere… joule is a unit of energy. You need it per watt, unit of power. Reference has US$4-5 per watt for the panels, and for a complete installation about $8 to [...]

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Evergreen Solar Panels @ Home – At What Prices Can You Buy These Panels?

By admin on Wednesday, December 9th, 2009 | 2 Comments

Planning to get some clean solar energy into the house and need to know the wattage / volts output I can expect corresponding to the panel price. Evergreen solar panels cost between $750 for the 170 W panel and $892 for the 195 W panel. These are some typical prices for the Evergreen brand: * [...]

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solar panel efficiency in space?

By admin on Wednesday, December 9th, 2009 | 2 Comments

What, if any, improvement in efficiency per square foot or meter is realized by a solar panel in space vs. being mounted on the ground where the light is attenuated by the atmosphere? In passing, I found a site that gives an output of .89 watts / 4 in. sq for a particular home-mounted panel. [...]

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Why do solar hot water panels have a shiny silver inner surface?

By admin on Wednesday, December 9th, 2009 | 2 Comments

Will the silver surface not reflect the heat absorbed by the matt black outer surface before it reaches the pipes to heat the water? The pipes are black to absorb the heat. The inner surface is reflective to focus the suns rays that miss the black pipes on the way in back on to the [...]

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Can you give me interesting information on solar energy/power?

By admin on Wednesday, December 9th, 2009 | 1 Comment

It might help me to make my project more interesting and fun. well…what exactly is your project? solar power=cheap, free, and easy. you could make a solar powered hotdog cooker to show how easily it can be harnessed. see here: http://www.energyquest.ca.gov/projects/solardogs.html or here for more info on solar powered fun! http://www.factmonster.com/spot/sciproject2.html

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