Re: Difference in digital readout panels on Xantrex and Progressive Industries EMS
Reply #1 –
We don't have a Progressive EMS for comparison, but when we have had unusually high voltage readings on our built-in coach monitoring panel (we have the Xantrex 2500, IIRC), the problem has been either a poor ground connection in the campground or another unit on the same leg/circuit of the campground which had a wiring problem, polluting the ground. When this happened, our Surge Guard indicated a "voltage on ground" error.
We've also seen a flickering red LED on the built-in coach readout when this occurred.
Voltage is a funny thing - it's actually a difference measurement, not an absolute one. So 125V is 125 volts above what the reference is (which should be 0 on ground). Once can still have 125V difference between a voltage leg and "ground", yet if there's a phantom voltage on "ground", either because the connection isn't good (ground is "floating") or there's a miswired rig on the leg, then a unit which "assumes" 0 voltage on ground will display a higher reading.
So let's say there's a phantom 15 volts on Ground. The voltage leg would be 120-125 volts above that, but a readout which assumed Ground was 0 would actually display 135-140 Volts.
In your case, if possible I would check on moving to a different site that's possibly on a different electrical circuit/leg unless the problem suddenly showed up with a particular rig's arrival (we had this happen). It's a small but possible safety concern.
Michelle