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Old 07-07-2018, 07:54 PM   #1
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House batteries are over charging 25 to 30 amps

Just drove 4 hrs, plugged into shore power, tri metric shows charging amps @ 25, batteries are bubbling level is good.

Heres the kicker, turned off inverter, started chassis, W22, chassis is also pumping 25 amps in.

Ive been here 2 hrs, inverter off, voltage 12.6 drawing 3 amps.

I am thinking something is wrong with batterie (s), as both the inverter/charger and chassis are pumping 25 amps into batteries

Can a bad battery cause charger to pump that many amps in

2ea. 6v. Interstate batteries 4 years old

Triplite inverter/charger came with RV.

Everything worked fine last weekend, have not moved Any dip switches

Did not check tri metric while driving, so its possible alternator could of been pumping 25 amp for the whole 4 hr drive
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Old 07-07-2018, 08:18 PM   #2
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I would start with new battery’s cheaper than the cost of technician
Four years is a long time for a deep cycle battery to last
In my opinion It’s time to change them out anyway
And there is a good chance it will solve your problem
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Old 07-07-2018, 08:35 PM   #3
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Quote:
Originally Posted by Will travel View Post
I would start with new battery’s cheaper than the cost of technician
Four years is a long time for a deep cycle battery to last
In my opinion It’s time to change them out anyway
And there is a good chance it will solve your problem
That is plan A, going to disconnect house battery from chassis solenoid, and get some more house batteries.

The one time I need a toad I and didn't bring one,
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Old 07-07-2018, 10:08 PM   #4
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Driving 4 hours then setting using batteries for only 2 hours and batteries are down to 12.v which is about 50% of full charge. Sounds like weak batteries to me. Not sure how many amps the inverter/charger should put out @ full charging output but at 50% charge it will call for max. charge.
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Old 07-08-2018, 07:52 AM   #5
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Driving 4 hours then setting using batteries for only 2 hours and batteries are down to 12.v which is about 50% of full charge. Sounds like weak batteries to me. Not sure how many amps the inverter/charger should put out @ full charging output but at 50% charge it will call for max. charge.
The batteries were never down to 12v, the lowest they were was 12.5.

This morning after having the inverter off, batteries showing 12.4 only thing running was T stay and fridge.

I turned inverter on, its charging batteries with 19 amps
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Old 07-08-2018, 07:59 AM   #6
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The batteries were never down to 12v, the lowest they were was 12.5.

This morning after having the inverter off, batteries showing 12.4 only thing running was T stay and fridge.

I turned inverter on, its charging batteries with 19 amps
My typo. Meant to say 12.6v. 12.5 - 12.6 is about 50% of full charge.
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Old 07-08-2018, 08:39 AM   #7
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12.6 is the resting voltage of a 12 volt battery. That's at 100% charge.
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Old 07-08-2018, 12:32 PM   #8
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Quote:
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12.6 is the resting voltage of a 12 volt battery. That's at 100% charge.
This^^.


50% discharge is 12.2 volts.


Batteries were at 12.4 after overnight use with small draw--that's 75% charge. I will let someone else evaluate if that is an excessive drop for 2x6 volt batteries that are in limited use.
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Old 07-08-2018, 09:27 PM   #9
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Update

I replaced the 2 6v with one 12v deep cycle

Same issue, turn on charger/inverter charging at 20 amps is slowly going down

I don't understand why its charging at such a high rate
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Old 07-08-2018, 09:38 PM   #10
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CJ,
It's also quite possible that you may have a shorted cell in one of the batteries. That could cause your charging systems, both of them, to think the batteries need more than they actually do. I've seen this more than a few times. This is where a hydrometer comes in handy. Just something else to possibly look at.
Scott
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Old 07-08-2018, 09:44 PM   #11
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You may have a poor ground issue with either the house or the chassis batteries
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Old 07-08-2018, 10:49 PM   #12
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CJ,
It's also quite possible that you may have a shorted cell in one of the batteries. That could cause your charging systems, both of them, to think the batteries need more than they actually do. I've seen this more than a few times. This is where a hydrometer comes in handy. Just something else to possibly look at.
Scott
Thanks Scott fire the suggestion, I have replaced the batteries, with 1 12v, as that is all I could get were I was at, I will continue to monitor it, I will be at current location for the week
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You may have a poor ground issue with either the house or the chassis batteries
Didn't think about that, tomorrow will clean battery grounds going to shunt and frame
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Old 07-09-2018, 08:54 AM   #13
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Update

With new battery installed and inverter on all night, all seems to be well

My conclusions are but not certain.

Batteries were bad.
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