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For Testing i let run a 24V 300 Watt Vertical Wind Gen 1,3 mx 1,35 m high Blades . The commercial use of verical wind genrator's , running from 3m/s to 50 m/s & 1 KvA 3 KvA / 10KvA at a Voltage 110volt , 220 volt til 440 volt . see www.verticalwind.ch E-Mails to verticalwind@gmx.ch