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Author Topic: House batteries charge issue  (Read 342 times)

majicchuck

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House batteries charge issue
« on: May 27, 2018, 12:07:40 PM »
When Iím plugged in-batteries are charging fine. However when I lost shore power (storage unit outlet just stopped working), noticed that 30 minutes later my voltage dropped to 12.45v :(. The batteries are relatively new (4/16) and have been maintained. What is typical voltage when going from full charge to non-charge state?
Chuck
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2005 Fleetwood Bounder 38N (Carolina)

majicchuck

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Re: House batteries charge issue
« Reply #1 on: May 27, 2018, 12:08:48 PM »
Coach has 4 ProStart 6volt batteries.
Chuck
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2005 Fleetwood Bounder 38N (Carolina)

Kevin Means

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Re: House batteries charge issue
« Reply #2 on: May 27, 2018, 06:00:32 PM »
When charging, most chargers float-charge at around 13.8 volts, with just enough current to keep the batteries topped off. Is that about what yours indicated when your batteries were charging? A fully charged six volt battery should indicate between 6.3 and 6.4 volts after it's been disconnected from the charger and all loads, and has sat for awhile. Two fully charged six volt batteries that are wired in series should indicate 12.6 to 12.7 volts. If there are loads on the batteries, the voltage will indicate somewhat less, depending on the load.

Is your volt meter accurate? If your batteries are indicating 12.4 volts shortly after being fully charged, and there's no load on them, there's a good chance that something is wrong with one, or more of them.

Kev

Kev   
2011 Winnebago Tour 42QD
Towing a Jeep Rubicon Unlimited LJ
RVI Brake 2, Minder TM-66 TPMS, 960 watts of solar
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Lakeside, California

majicchuck

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  • Posts: 93
Re: House batteries charge issue
« Reply #3 on: May 27, 2018, 07:50:50 PM »
When charging, most chargers float-charge at around 13.8 volts, with just enough current to keep the batteries topped off. Is that about what yours indicated when your batteries were charging? A fully charged six volt battery should indicate between 6.3 and 6.4 volts after it's been disconnected from the charger and all loads, and has sat for awhile. Two fully charged six volt batteries that are wired in series should indicate 12.6 to 12.7 volts. If there are loads on the batteries, the voltage will indicate somewhat less, depending on the load.

Is your volt meter accurate? If your batteries are indicating 12.4 volts shortly after being fully charged, and there's no load on them, there's a good chance that something is wrong with one, or more of them.


Kev

Kev

Okay. Yeah the batteries were 13.8 to 14.0 when plugged in. They are wired in series. The only load was the fridge for the 12.4 reading.





Chuck
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2005 Fleetwood Bounder 38N (Carolina)

JSplaine

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Re: House batteries charge issue
« Reply #4 on: May 27, 2018, 09:36:43 PM »
Fridge can draw a lot, turn off fridge and read voltage. There many things that could draw down to 12.4 from 12.6 including the monitoring system that you are getting the reading from. Note the voltage and check again in one hour with no change to load (what is already on). 
« Last Edit: May 27, 2018, 09:38:54 PM by JSplaine »
2012 Allegro Red 38QRA
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