More problems. After the core was replaced (this has been described in Stuart's 'my turbine is broken thread') the turbine worked well for about 2 weeks. Then there was a problem on start up with the turbine providing an over volt supply into the inverter. Turbine services fitted 3 x 2 KW DC heaters to work as a heat/power sink if the turbine overvolted, so as to protect the inverter. However this was not enough to survive a summer gale. If the inverter shut down, either for over volting the mains or because of a frequency mismatch, the heat sink would kick in while the inverter tried to start up again. However on one occasion it was not enough, with the inverter making a poping noise, followed by displaying an earth fault.

Investigation showed a blown capacitor, which is being replaced. A better over volt protection system is being fitted next week. In the mean time the turbine is free wheeling and in my first 3 months of operation I will have had 2 months of down time and only 200 KWH generated, all rather disappointing. While my high mains voltage, due to my transformer having been 'tapped up' makes my inverter shut down, I refuse to accept this as a cause of the problem, it would be no different from if there was a power cut during a period of high winds.

Has anyone else had problems of the turbine over volting when the inverter has disconnected and is trying to start up?
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Simonridout