I have a voltage difference between the shunt and the batteries. My batteries are showing 13.27 bolts yet the shunt is continuously changing around 12.87volts.
What coujd be the reason for this? I’ve checked all battery terminals.
Check the small glass fuse, the spring contacts in these can weaken giving poor contact. Also, as they are not sealed, they can often get moisture in and corrode.
So is the fuse on the shunt as can’t see it or in the back of the display?
The positive wire that comes with all battery monitors has a small in line glass fuse in it. Perhaps it was replaced in your install, but there should be a fuse pf some description in the positive wire.
Thank you. I’ll check that out.
The more current you push through the shunt, the higher the voltage difference (on either side of the shunt).
So, E=IR…Voltage equals Amps time Resistance(Ohms)
2 things to check. Lug connections (not clamping on insulation) and torque on the shunt.
Is there corrosion on the pcb on the shunt? Or between the pcb and the shunt?
The shunt is sitting underneath my caravan screwed ti tte floor. It is very dusty and maybe I should spray it with contact cleaner. Lugs are tight.