Forum Discussion

fcooper's avatar
fcooper
Explorer II
Dec 08, 2013

Charging System, Moderately High Voltage, need ideas

The motorhome is described in signature block below. With the VMSpc monitor, I normally see voltage in the range of 13.6 to 13.8. Today on the highway, I am seeing 14.1 to 14.3, then back to 13.9. ...
Class A
wolfe10's avatar
wolfe10
Explorer
Dec 09, 2013
Look at your alternator. If it has a separate "sense" wire vs just having it wired off the B+ terminal, you might check that its connection to your chassis battery, isolator or where ever it is connected is clean and tight.

With an external sense wire, if there is resistance, it does not "sense" the full voltage and can lead to overcharging.

I am not suggesting that a little over 14 VDC is overcharging in cold conditions, but is something that can be easily checked.

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