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Open Roads Forum  >  Tech Issues

 > Bad Xantrex or bad batteries

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mrad

Prineton, MN

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Posted: 05/31/21 11:31am Link  |  Quote  |  Print  |  Notify Moderator

Last week I got some help from you guys when I had an issue while trying to see how long my residential fridge would run on the two 6 volt golf cart batteries I had put in last fall. When I checked on it after 4-5 hours, I was getting an E05 code. After getting some help on how to reset it, normal readings came back.
Today I was going t try it again. I unplugged from shore power and by the time I got into the 5th wheel, it was showing an E02 code that would blink on, then show the voltage which was showing sporadic readings or 12.6, 11.8,10.1. WHen I prest the batterie indicator button on the control panel, it fluctuated from a full four-light down to one light.
I was also hearing noises from the fridge. I quickly plugged back into shore power and when I came back in, the Xantrex display was reading 14.4.
Does this sound like the Xantrex is bad, or the batteries may be bad?

I have a Xantrex XM 1000

2oldman

NM

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Posted: 05/31/21 11:42am Link  |  Quote  |  Print  |  Notify Moderator

Sounds more like a loose/bad connection making intermittent contact. Easy enough to check the batteries with a voltmeter and close inspection.

Ranger Smith

Wherever the rig is parked

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Posted: 05/31/21 11:55am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like the xantrrex is working. Take the batteries out and have them tested. You need to do a load test and not just check them with a volt meter.


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mrad

Prineton, MN

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Posted: 05/31/21 12:15pm Link  |  Quote  |  Print  |  Notify Moderator

In my earlier post, some commented the Xantrex 1000 might be too small. After thinking about it, I know it worked for a few hours last October. When we got ot our campsite, they had put us in a 30 amp, so I had to run around town looking for an adaptor. When none was to be found, I bought a gas can and put gas in the onboard tank so I could use the generator to give the batteries a good charge when needed. The batteries seemed to make it through the night.

dougrainer

Carrolton, Texas

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Posted: 05/31/21 01:42pm Link  |  Quote  |  Print  |  Notify Moderator

mrad wrote:

In my earlier post, some commented the Xantrex 1000 might be too small. After thinking about it, I know it worked for a few hours last October. When we got ot our campsite, they had put us in a 30 amp, so I had to run around town looking for an adaptor. When none was to be found, I bought a gas can and put gas in the onboard tank so I could use the generator to give the batteries a good charge when needed. The batteries seemed to make it through the night.


AS I stated earlier, a 1000 watt Inverter has more than twice the power to run a residential refer. BATTERIES and Capacity of Batteries is your limiting factor. You could have a 2500 watt Inverter and you would still have the same problem. Doug

FYI, most class A Oems will state no more than 24 hours running a residential refer with just 2 deep cycle batteries. You CAN run longer, but they state 24 hours.

mrad

Prineton, MN

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Posted: 05/31/21 03:56pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

mrad wrote:

In my earlier post, some commented the Xantrex 1000 might be too small. After thinking about it, I know it worked for a few hours last October. When we got ot our campsite, they had put us in a 30 amp, so I had to run around town looking for an adaptor. When none was to be found, I bought a gas can and put gas in the onboard tank so I could use the generator to give the batteries a good charge when needed. The batteries seemed to make it through the night.


AS I stated earlier, a 1000 watt Inverter has more than twice the power to run a residential refer. BATTERIES and Capacity of Batteries is your limiting factor. You could have a 2500 watt Inverter and you would still have the same problem. Doug

FYI, most class A Oems will state no more than 24 hours running a residential refer with just 2 deep cycle batteries. You CAN run longer, but they state 24 hours.


That's good to know I would only need 8-10 hours of run time with my two golf cart batteries. I would like to add another pair, but I don't think I have the room

wa8yxm

Davison Michigan (East of Flint)

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Posted: 05/31/21 04:22pm Link  |  Quote  |  Print  |  Notify Moderator

Residential fridge draws likely 200-300 watts running

About 5 times that (or more) starting

a pair of 6V batteies holds about 120 amp hours or 1200 watts of usable energery
So 4-6 horus is more than you can expect because at that high a draw the capacity of the batteries goes DOWN and of course there are other loads as well.

So I'd guess 2-3 hours for a single 6Vpair and that's pushing it.

Double the batteries and you get a bit more than double the run time
A HIGH effiency (What I call Danfoss class) fridge, Both Dometic and norcold make 'em Draws about 40-50 watts.. Think about that.


Home was where I park it. but alas the.
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dougrainer

Carrolton, Texas

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Posted: 05/31/21 04:53pm Link  |  Quote  |  Print  |  Notify Moderator

Remember, the residential refer does NOT--NOT run all the time. Once it reaches temp it shuts down. And it reaches and holds temp faster and better than a RV refer Doug

mrad

Prineton, MN

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Posted: 06/01/21 03:44pm Link  |  Quote  |  Print  |  Notify Moderator

Hmmmm....now I am questioning my decision to go with the golfcart batteries. Last fall before we picked up the coach I had asked on this forum if the golfcart batteries would be a better fit than two group 27 RV/Deepcycles. I thought th consensus was to go with the golfcart batteries

wolfe10

Texas

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Posted: 06/02/21 08:39am Link  |  Quote  |  Print  |  Notify Moderator

mrad wrote:

Hmmmm....now I am questioning my decision to go with the golfcart batteries. Last fall before we picked up the coach I had asked on this forum if the golfcart batteries would be a better fit than two group 27 RV/Deepcycles. I thought th consensus was to go with the golfcart batteries


Golf cart/6 VDC batteries wired in series ARE the lest expensive way to get deep cycle batteries.

But, amp-hrs @12 VDC is what you're interested in.

If you want to evaluate your decision (kind of late), compare amp-hrs @ 12 VDC. And difficult to find real group 27 deep cycle batteries. Most are deep cycle/start batteries.

Another comparison is battery weight-- a good indicator of capacity/longevity.


Brett Wolfe
Ex: 2003 Alpine 38'FDDS
Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240

Diesel RV Club:http://www.dieselrvclub.org/

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