07-21-2008, 11:51 AM
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CC Member
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Join Date: Nov 2003
Location: New Britain,
CT
Cobra Make, Engine: Size 10 Feet
Posts: 3,028
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Not Ranked
Solar insolation (the Sun's energy reaching the Earth's surface) is about 0.4 KW per square meter during the daytime (let's say 10 hours - optimistic...). Solar panels are about 10% efficient, so you would be getting .04 KW/sqM/hour=0.4 KW per day per square meter.
Your car needs 5-100 KW for driving. So... for an hour's driving you would need a minimum of about 50 square meters of PVs to generate 20 KWH. With a small car and brake regeneration, you might be able to get away with 10 KWH in the city.
Somebody should check my math. I'm doing this on the run...
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