Popular Science has plans for how to build a vertical wind turbine on their site. The turbine is "super-quiet" and will generate about 50 kilowatt-hours/month in winds of 6-20 mph.
So, how is this thing as an investment?
Estimated cost of supplies = $300
Electricity costs about $0.10/kWh. So 50 kWh saves you about $5/month. That's 60 bucks a year, or 20% ROI. That's market beating returns. Projects like this show that wind can make sense on a small scale.
Saturday, August 25, 2007
How to make 20% on your money
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