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Old 08-27-2013, 08:33 AM   #1
Join Date: Aug 2013
Location: Colorado
Posts: 48
Monitor panel readings

I'm checking again to see if someone can explain how to read the monitor panel.
With no power on to the RV at all, are the readings from the panel accurate because mine says LOW for Aux Batteries but they are fully charged (I think they are at least, cause I had them connected to power all night to get charged and they read 13.1 volts this morning)
If i engage the relay for the Aux batteries to load them, then the panel shows fully charged.
Why does the panel even show anything when the RV is powered off?

It also shows my Chassis battery at Half but the voltage on that battery is 12.1 on my meter. Turning on the relay also shows that battery at full charge afterwards.
Is it possible my two batteries are connected together through that Aux switch you use when you want to link them in for extra juice? (up in the cab to the left of the steering wheel, by the Emerg. Brake area?)
i have a 2006 fleetwood jamboree GT 31W

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Old 08-27-2013, 09:24 AM   #2
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Join Date: Jun 2010
Posts: 163
I assume your batteries are full of fluid and are working properly. The faulty readings may be caused by bad grounds. This will cause inadequate readings as you have indicated.

You said you had the batteries connected to power all night. Was the battery disconnect switch set to the ON position. If not, the batteries did not receive a charge. A 13.1 volt reading taken immediately after being plugged in all night is a very low reading.

Concerning your chassis battery....12.1 on your meter indicates that battery is nearly DEAD and needs charging. So your reading on the panel may be accurate

You are correct concerning the relay. When you turn it on you are reading power from all batteries.

So going forward, have your batteries checked out to make sure they are working properly and the battery connections are clean, then check the ground where the negative cable connects to the frame

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Old 08-27-2013, 03:11 PM   #3
Join Date: Aug 2013
Location: Colorado
Posts: 48
What should the house batteries read on the meter if they are fully charged? I seem to get different answers from everyone.

What should a fully charged chassis battery read? It seems to crank over just fine right now.

I did check all the cells for water and they were all full. (house batts) The Chassis batt looks to be 3 years old. Can i just leave the engine on running and charge up the chassis battery?
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Old 08-27-2013, 04:28 PM   #4
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Join Date: Feb 2009
Posts: 67
you should expect 2.10v per cell so a disconnected 12v battery, having 6 cells should be 12.6V or 12.7V "quiescent" which would be say... the day after it was last charged and left disconnected.
if the alternator from the engine or the converter from AC are running, expect a lot higher.
for a converter, it depends which program is currently running. for the alternator, you could get a brutish 14V+

as said above 12.1V is practically dead.
if you leave the engine on idle it probably won't be producing enough energy to charge your batts (but it depends).
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