[RFI] Battery charger RFI

[Hardy Landskov]

All,
My neighbor has a 5th wheel trailer that he trickle charges the battery
24/7. Beginning about 2 weeks ago it started putting out trash from the AM
broadcast band up to 40 meters with peaks every 70 KHz. Of course that
wipes out 80 and 160. The only thing he said was different was he changed
where he plugs it in. He was tired of tripping over the cord. And he
refuses to go back to the other socket (of course).
So, what;s the best way to filter this and does he really have to trickle
charge the battery 24/7? If he could charge during the day and shut it off
at night that would work for me.
73 Hardy N7RT