coldwind Micro Hydroelectric Generator 500 Watt 50 Hz 220 V High Power with Monitoring TV Lighting Computer for Outdoor Use 500 W 220 V : Amazon.de: Business, Industry & Science
coldwind Micro Hydroelectric Generator 500 Watt 50 Hz 220 V High Power with Monitoring TV Lighting Computer for Outdoor Use 500 W 220 V : Amazon.de: Business, Industry & Science
Amazon.com: Mini Water Turbine
Assuming “normal” rates for electricity, how many years does it take for a wind turbine to pay for itself or “break even”? - Quora