@stuart is the one who can really help.
If I recall correctly from the “somewhere” in the thread, it was indeed changed to give more stable results.
One other thing that should help is to wrap the charge cables in aluminium foil (not the bare contacts) and ground those 2 shielded power cables.
Alu foil on the communication wire (TX/RX) can help also.
Please do ground all aluminium foil you are planning to use.
Chicken wire (fine mesh) is perfect barrier also.
The noise is low frequency waves, and mesh of 2.*.2 cm (or so) is small enough to catch the noise.
Catching = getting charged.
Call it static electricity, electro magnetic field, noise, leaking current or what you like.
Without grounding, in a few hours/days it could give a nasty bite. (Depending on mass, and noise)
Most of you who are stupid like me use higher power inverter for some time, without grounding the casing…
And then get small (or larger) bite from touching the casing
I’m sure I’m not the only one who first needs to feel before I start grounding.