I'v got a small 500w 12v AC turbine connected to a 500w GTI. the turbine is 30 feet high in an open area in the west of Ireland. in a 20mph wind the turbine is struggling to produce any where near 100w. The wiring is about 5mm thick over about 30 feet run. Is there something i'm doing wrong? or have I got some faulty equipment? What should I be expecting from the turbine and GTI I also have 700w of solar which I am happy with, my experience with the turbine is putting me off them altogether.......can someone please help before I set about it with a large hammer..