Technical Support

My sunSynk is causing noise in the Inveter Appliances. Inerter AirCon has a high pitched noise coming from it. Bought a new Inveter Micro wave and getting the same high pitched noise out the Microwave. Doesn't make a difference if the Inveter is on the Grid or load side or battery alone. Tested the Microwave ao anothe brand and no noise. All research say the Frequency is dirty and not pure sine wave. Any solution?