Caravan & Camper Battery Charging Feedback

Hi Paul
Thanks for the folllow up the change over switch may be my only answer
regards
Graham

Mainey
Thanks for the follow up/
Two 80 W panels feed through a BP PL 20 regulator direct to the battery.
The charger is a Wialki Electronics SWwitch mode Battery Charger with an output of 13.8VDC @23Amps.

There is also another pair connected to the charger that I think goes to the fuse panel and via a large diode to protect from feedback to the tow vehicle ???
Regards
Graham

Graham,
(a) Do you still get the "noise" if you momentarily disconnect --> "the another pair connected to the charger that I think goes to the fuse panel and via a large diode to protect from feedback to the tow vehicle"

(b) does the "noise" increase or decrease with the variation of Amps going to the battery from the Plasmatronics regulator ?
Eg, if you hear the "noise" when Amps going to the battery, then actually 'cover' the solar panels with a blanket so little or even no amps relieved, does the noise decrease or stop ?

I have not been able at this pot to disconnect the pair as suggested as we are on the road. I shall do so at the first opportunity. The noise does increase and decrease as the load varies. I shall also try covering the panels with a blanket. We will be in Sydney for a week as of Sunday and I will have time to check the system out
Regards
Graham