rnevillesmith
New member
I am a newcomer to wind turbines but have had one installed. The turbine is a 6kW Kingspam and the inverter is Power-One. I have the excess power wired to 3 low power Dimplex heaters which is fine except when powered they emit a a high frequency noise (for those with good hearing) although I can only just hear a lower frequency noise at approx 50 cps. A previous cheap convector heater did not make this noise. I am puzzled about the cause - is it because the inverter produces "spiky" AC. Has anyone experienced similar problems and any solutions offered?