ultranox

Amazing, thank you so much for your detailed reply. I makes a lot of sense, I can hear the noise if i stand right next to the inverter also. The slight isssue I have though is that the cables actually come in under the house from the field where the PVs are, they run in plastic conduit so can be pulled out and put back in. So in theory i could wrap them tightly together and wrap them in aluminium tape to act as shielding and bonding, then add the ferrites at the inverter and and ground all. Do you feel this would help? Its strange because it never used to do it, I guess the other option might be to replace the MTTP or indeed the whole inverter in time? Many thanks again for your reply, if you have any other words of wisdom that would be great.

Hello all, we have an Axpert vm iv. I am getting very bad rf interferance on my stereo (only phono stage), I have tried so many solutions. But it seems by a matter of elimination be related to the PV cables. If they are disconnected from the inverter, no issues. You put one in, humming, 2 in, louder humming. They can be charging or not, they can even be disconnected at the panels, but still noise. disconnect from the actual inverter, it stops! ANY IDEAS?