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05-14-2012, 08:19 AM
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#1
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Senior Member
Join Date: Jan 2011
Location: Central Arizona
Posts: 123
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Battery life gauge?
I have yet another battery related question. Pertaining to the gauge cluster that's located inside the TT (batt., grey, black & water heater).
When I check to see the life left in my battery with this gauge and it shows that it's low, does that mean that the battery is near it's 50% range or does that indicate that the battery is near it's drained stage?
Thanks.
__________________
- 3/4 ton Ford Conversion w/tow package
- 2008 Jayco EXP 29A TT
- Myself, wfe & (4) children
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05-14-2012, 09:04 AM
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#2
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Senior Member
Join Date: Dec 2011
Posts: 427
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Quote:
Originally Posted by chopshop
I have yet another battery related question. Pertaining to the gauge cluster that's located inside the TT (batt., grey, black & water heater).
When I check to see the life left in my battery with this gauge and it shows that it's low, does that mean that the battery is near it's 50% range or does that indicate that the battery is near it's drained stage?
Thanks.
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As I understand the readings on the guage panel, the reading are how full or empty the items being read are- The holding tank readings have never been accurate on any unit I have owned but the level of battery charge and amount of fresh water available are quite accurate- If you boondock a lot, a second battery or more is a consideration- If, however, your battery reading is low under normal circumstances the battery is failing or not being recharged by the onboard charger- JMHO- DD
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Fulltiming since July 1, 1999 currently with a 2005 GMC Sierra 3500 cc drw towing a 2007 Jayco Eagle 341RLQS
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05-14-2012, 09:37 AM
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#3
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Senior Member
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,726
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Those gauges are put there to make the manufacture feel good... they are so far from accurate as to be useless. Get a multimeter and read the direct battery voltage...12.06 is considered as low as you should ever go...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days /2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12
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05-14-2012, 03:22 PM
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#4
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Senior Member
Join Date: Jan 2011
Posts: 154
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Further, your idiot lights will go lower if you have something drawing power. You need to look at them only when everything is off (and not connected to shore power). And yes, to really know, you need a voltmeter. Same rules apply.
Tom
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05-14-2012, 05:17 PM
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#5
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Senior Member
Join Date: Feb 2011
Location: Germantown, TN
Posts: 4,923
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At least in my case, you end up "learning" your gauges. They are a good quick and dirty check. I know if I have just about anything on my gauge will read 1/2 or less. I check it late when pretty much everything is "at rest" and know it is a pretty good indication. Same thing goes for the water/waste levels - they are a good guide and you learn how and when to rely on them.
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05-14-2012, 07:08 PM
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#6
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Senior Member
Join Date: Feb 2011
Location: SW Ontario
Posts: 1,393
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It would be interesting to compare digital voltmeter readings suggested by Sean45, to the limited led bar graph installed by Jayco in the TT. The bar graph would be repeatable, but I'm certain each TT will be slightly different when compared to a digital voltmeter. I agree with Sean45 about the actual voltage levels, and if you're so inclined, the digital readout will give you a better idea of how much capacity is left, at any given time. The reason for not going below 12.06 volts (as per Sean45) is doing so is hard on the battery. Although they are deep discharge batteries, there are limits.
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2013 Jayco Eagle 31.5RLDS
2018 Silverado 2500 HD Duramax
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05-14-2012, 07:42 PM
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#7
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Senior Member
Join Date: May 2011
Location: Aldergrove British Columbia
Posts: 815
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I've read in the past that the proper way to read your led battery lights is to turn a light on and than check the level. Also I think we've all seen the graphs where the life of your battery is severely shortened the more times you deplete the charge by more than 50 percent. Seems unfair to only be able use only half of what is avaible before your penalized for it.
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Richard
2011 Jay Feather Select 28U
2007 Silverado Crewcab LT 6.0L
Happily married and father of
two university students.
Cancer survivor
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05-14-2012, 07:57 PM
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#8
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Senior Member
Join Date: Mar 2012
Location: Friendswood, TX.
Posts: 163
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I do wish the TT I have now had the digital display like the select pop-up I had. I guess I will just use the multi-meter instead.
__________________
2007 Toyota Tundra Crewmax LTD 4x4 5.7l w/4.3r 381 hp and 401 lb-ft of torque
2012 Jayco 32BHDS
Me, Wife and 3 kiddos
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05-14-2012, 08:09 PM
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#9
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Senior Member
Join Date: Feb 2011
Location: Germantown, TN
Posts: 4,923
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One thing you will find is the voltage reading can vary widely depending on where you take it. Taking it from the battery is the most accurate, but at least in my trailer - I have quite a bit of loss when taking a reading at points inside.
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05-14-2012, 09:03 PM
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#10
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Member
Join Date: Mar 2012
Location: Ontario, Canada
Posts: 61
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I have a digital volt meter display with a 12v plug on the end. I just plug it into the 12v outlet inside the trailer & read the battery that way. I compared it to having my volt meter directly on the battery & it reads the same within 0.1v. So it seems accurate and I can check voltage in a few seconds without opening up the battery box.
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2010 Jayco 17z - Sold
2009 KZ Sportsmen 256BH
2011 Dodge Ram 1500 Laramie 4x4 Crew
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05-14-2012, 10:46 PM
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#11
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Senior Member
Join Date: Jan 2011
Location: Central Arizona
Posts: 123
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Thanks for the replies.
So..........when my battery is at 12.06 what will my TT gauge read; low or half?
Sorry for the confusion.
__________________
- 3/4 ton Ford Conversion w/tow package
- 2008 Jayco EXP 29A TT
- Myself, wfe & (4) children
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05-15-2012, 12:38 PM
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#12
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Senior Member
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,726
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Who knows I NEVER USE IT... you can get a VOM at Radio Shack for just a couple of dollars and after having it for a while you will wonder how you ever survived without it...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days /2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12
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05-15-2012, 10:58 PM
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#13
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Senior Member
Join Date: Jan 2011
Location: Central Arizona
Posts: 123
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Quote:
Originally Posted by Seann45
Who knows I NEVER USE IT... you can get a VOM at Radio Shack for just a couple of dollars and after having it for a while you will wonder how you ever survived without it...
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Thanks, that will be on me list of items to pick up tomorrow.
__________________
- 3/4 ton Ford Conversion w/tow package
- 2008 Jayco EXP 29A TT
- Myself, wfe & (4) children
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