Annoying PWM sound from Xantrex inverter
I finally got my Xantrex ProWatt SW 2000 installed into my rig. Functionally, everything seems great. I can run the hair dryer (on 800W setting anyway) and microwave at the same time. I finished...
Forum Discussion
Gerald55 wrote:
I should add, although I don't think it matters:
The wiring is such that the inverter is the only thing wired directly to the batteries, via 2/0 cable. The solar controller output, as well as the 12V leads for the rest of the coach, are all wired to the inverter terminals.
Circuit-wise this is all same, but I'm not sure if wiring the controller leads to the battery somehow causes more of the PWM noise to affect the inverter.
Yes it matters
The 2/0 cable is great for controlling voltage drop between battery and inverter
But it doesn't filter the noise that is being applied directly to the inverter and the house wiring, because the batteries are at the other end of the 2/0 cable
What you have done turns all that wiring into an antenna to transmit / broadcast that pulse
