Around $280,000 for a 75 kilowatt generator, but the system pays for itself over time, since the electric company has to buy the surplus off you. In states like California that have renewable energy goals, cow powered methane energy could become a viable alternative. This system also captures and uses the methane, a greenhouse gas, instead of allowing it directly into the atmosphere.
Compared to this solar project: http://thetyee.ca/News/2009/07/24/FirstNationSolarPower/…Which cost around $1.5 million for the same 75 kilowatts of energy.
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