I am a retired electronics engineer and build micro hydro installations for fun and sometimes even profit. This one uses a pump/motor as a turbine/generator using a waterfall in our back yard. It is currently producing 15KW. I will be expanding it to 30KW to take advantage of greater winter flows.
It's not the product, but the process... I enjoy doing the most with the least. So this renewable energy source cost only $2 per watt of capacity not counting my labor. The cost will get even lower as I add turbine/generators to take full advantage of the installed 8" penstock and excess winter water flows.
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