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11-24-2021, 08:58 AM
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#1
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Member
Join Date: May 2007
Posts: 89
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Voltage at house batteries when fully charged?
2001 Intrigue, 2 year old 8D batteries (all 3), Trace engineering 200 Amp Inverter Charger
Remote states the charger is in Float Mode, showing 12.6 Volts at batteries. Is this what everyone else is seeing? Trying to figure out if I have an issue with what appears to be originally installed inverter/ charger.
Thanks in advance, Christian
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2001 Country Coach Intrigue "Evening Star" #11290
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11-24-2021, 09:08 AM
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#2
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Senior Member
Damon Owners Club
Join Date: Apr 2020
Location: Clovis NM
Posts: 4,389
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While charging, you could see upwards of 13 + volts. With the charger off and the batteries stabilized (rested for a couple hours), full charge is about 12.6 to 12.7 Volts
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2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.
Retired USAF
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11-24-2021, 09:10 AM
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#3
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Jun 2008
Location: Glendora Ca.
Posts: 1,589
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12.6 means no charge. check breaker on inverter.
Mike
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2004 Monaco Monarch
Blueox, SMI, 1990 Wrangler YJ
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11-24-2021, 09:29 AM
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#4
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Senior Member
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,465
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Quote:
Originally Posted by HarryStone
While charging, you could see upwards of 13 + volts. With the charger off and the batteries stabilized (rested for a couple hours), full charge is about 12.6 to 12.7 Volts
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Quote:
Originally Posted by mfire1339
12.6 means no charge. check breaker on inverter.
Mike
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The two above posts are correct and are not contradictory.
If the batteries are disconnected from a charger and have stabilized, 12.6-12.7v indicates they are fully charged.
If still connected to charger and in "float" mode, 13.4-13.5 should be the reading.
OP, since you are still in float mode and your reading is 12.6, the charger or, as mentioned the circuit breaker from the charger, is suspect.
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Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
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11-24-2021, 09:50 AM
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#5
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Senior Member
Alpine Owners Club
Join Date: Nov 2015
Location: Lake Havasu City, AZ
Posts: 3,013
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Quote:
Originally Posted by Ljwt330
The two above posts are correct and are not contradictory.
If the batteries are disconnected from a charger and have stabilized, 12.6-12.7v indicates they are fully charged.
If still connected to charger and in "float" mode, 13.4-13.5 should be the reading.
OP, since you are still in float mode and your reading is 12.6, the charger or, as mentioned the circuit breaker from the charger, is suspect.
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This^^^
The only change I would add is that healthy batteries (Lead Acid) with a healthy charger should be ~13.2V while in float...... I would check the batteries first with a hydrometer then the output at the leads from the inverter.
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Paul & Jean
2001 Alpine 36FDDS (74291)-3900W Solar, 13,440Wh (525Ah @24V) LiFePO4
2019 Jeep Grand Cherokee Trailhawk (Hemi)
2006 Alpenlite 32RL - Sold
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11-24-2021, 10:38 AM
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#6
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Member
Join Date: May 2007
Posts: 89
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I'll check the batteries with the hydrometer next, thank you gentleman, I appreciate it.
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2001 Country Coach Intrigue "Evening Star" #11290
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11-24-2021, 11:10 AM
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#7
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Senior Member
Join Date: Jul 2014
Posts: 35,424
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If you have a Battery Tempeture Sensor ( BTS ) connected to your inverter/charger, unplug it and see if your float voltage comes up to 13ish volts.
They sense battery temps to control charging voltage and are often damaged while replacing batteries.
If bad leave it unplugged. The inverter/charger default to 77°F.
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11-25-2021, 11:50 AM
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#8
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Senior Member
Join Date: Jun 2016
Location: Minden nevada
Posts: 737
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A little low , before condemning the converter are you sure your voltmeter is accurate especially if it isn’t digital.
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2002 country coach allure 32 foot dual slide 350 cummins ISC
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11-26-2021, 09:52 AM
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#9
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Member
Join Date: May 2007
Posts: 89
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Quote:
Originally Posted by twinboat
If you have a Battery Tempeture Sensor ( BTS ) connected to your inverter/charger, unplug it and see if your float voltage comes up to 13ish volts.
They sense battery temps to control charging voltage and are often damaged while replacing batteries.
If bad leave it unplugged. The inverter/charger default to 77°F.
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Great info! I was looking at the sensor and was curious if that would have an impact if failed. I’ll try that now.
Thanks for the tip on the meter, I use a Fluke 87V with true RMS.
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2001 Country Coach Intrigue "Evening Star" #11290
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11-26-2021, 10:32 AM
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#10
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Member
Join Date: May 2007
Posts: 89
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This forum is the best! I unplugged my battery temp sensor and it went to 13.2 volts for float charge. I will purchase a new sensor and install when we get home. Thanks for the info, hope this helps someone else in the future.
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2001 Country Coach Intrigue "Evening Star" #11290
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01-14-2022, 12:45 PM
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#11
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Senior Member
Join Date: Feb 2010
Posts: 4,654
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12.6 is static full charge voltage of battery not being charged.
Float voltage varies, depends on exact battery for exact voltage but general rule is 2.25 volts per cell or 13.5 volts while being float charged.
Any more and they Gass out.
Temperature matters too, temperature controlled may vary this.
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Tony & Lori
1989 Country Coach Savannah SE
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