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| Both sides previous revision Previous revision Next revision | Previous revision | ||
| solar_power [2008-05-05 08:59] – 81.188.78.24 | solar_power [2008-05-26 17:00] (current) – nik | ||
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| * flexible thinfilm -> http:// | * flexible thinfilm -> http:// | ||
| - | ==== notes ==== | + | ==== guestimates |
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| ie., you'd need less than 1% of Texas using off-the-shelf solar cells to equal the power generating capacity of the entire US grid. | ie., you'd need less than 1% of Texas using off-the-shelf solar cells to equal the power generating capacity of the entire US grid. | ||
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| + | or... | ||
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| + | Humanity uses around 1.5e13 W, and the Earth receives around 1.366e3 W per m² from the Sun (varies with year and month). Earth has a land area of around 1.5e8 km². Assuming 10% efficiency for photovoltaics, | ||
| </ | </ | ||
81.188.78.24