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04-24-2016, 11:31 AM
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#21
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Rivet Master
2019 27' Globetrotter
Salem
, Oregon
Join Date: Nov 2015
Posts: 691
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Even with the PD 4655 the charger never gets to storage mode just stays at normal mode of charging at 13.6 volts. I have not got the new batteries yet as I hate to make another 100 trip to the dealer so will have till wait till mid may for an appointment for other things.
Should I let the batteries set for a while then put it boost mode?
Thanks Dave
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06-15-2016, 06:26 PM
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#22
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Site Team
2009 25' FB International
2018 27' Globetrotter
Tavares
, Florida
Join Date: Mar 2014
Posts: 3,674
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Quote:
Originally Posted by Tn Traveler
Lewster is right on. About 12.2 volts is 50% charge in an AGM or flooded 12 volt DC battery. To get to the estimated state of charge the batteries need to be resting with no loads in or out. They should rest for an hour or two to settle near their true state of charge. That is why a SOC meter is so important to battery management. They give state of charge based on amps used and amps restored. It is very seldom that you will be reading your battery voltage after completely resting them. A SOC meter is only as good as the parameters you set up for it.
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I've been reading some of the posts relative to batteries to try to get a better understanding. I have older analog voltmeter which I'm beginning to believe is not accurate enough to read tenths (unless I'm not using it correctly). I read in your post about a SOC meter. I have no idea what that is. Could you (or someone) provide a description and some information?
Thanks!
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06-15-2016, 07:02 PM
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#23
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3 Rivet Member
2014 25' FB Flying Cloud
LaMarque
, Texas
Join Date: Apr 2014
Posts: 133
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[ATTACH]264546[/ATTACH
Sent from my iPhone using Airstream Forums silver bp
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06-15-2016, 07:02 PM
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#24
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3 Rivet Member
2014 25' FB Flying Cloud
LaMarque
, Texas
Join Date: Apr 2014
Posts: 133
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This might help.
Sent from my iPhone using Airstream Forums silver bp
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06-15-2016, 07:39 PM
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#25
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4 Rivet Member
2006 25' Safari
Signal Mountain
, Tennessee
Join Date: Jan 2016
Posts: 450
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For long life try to keep your batteries at least at 50% state of charge.
__________________
Don
'06 Safari 25 LS
'18 GMC 2500HD Duramax/Allison
TN,”Greenest State in the Land of the Free”.Davy Crocket
" America is not a place;it's a road." Mark Twain
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06-15-2016, 08:02 PM
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#26
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Overland Adventurer
1991 34' Excella
2009 34' Panamerica
Telluride
, Colorado
Join Date: May 2012
Posts: 2,476
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Its not really the depth of discharge.... its how long you leave it there and not bring it back to full!
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06-16-2016, 04:53 AM
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#27
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Site Team
2009 25' FB International
2018 27' Globetrotter
Tavares
, Florida
Join Date: Mar 2014
Posts: 3,674
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Quote:
Originally Posted by Tn Traveler
For long life try to keep your batteries at least at 50% state of charge.
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Thanks. And just what is a SOC meter?
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06-16-2016, 05:32 AM
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#28
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Overland Adventurer
1991 34' Excella
2009 34' Panamerica
Telluride
, Colorado
Join Date: May 2012
Posts: 2,476
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SOC = state of charge
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06-16-2016, 06:16 AM
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#29
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Rivet Master
2020 28' Flying Cloud
Upper St Clair
, Pennsylvania
Join Date: Aug 2011
Posts: 2,943
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All I can add is I've not looked up any manufacturers specs recently, however, when I was in an industry that used 100,000's of 12v deep cycle batteries we were advised to discharge batteries to 0% and re charge prior to putting them to sleep for winter storage. The golf car industry routinely discharges and re-charges these batteries yearly and despite daily use drawing batteries well below 50% levels they come back and last 4-5 years, in most cases. My group of employees and distributors routinely maintained over 80,000 batteries yearly.
I called one of my former technicians and the industry is still doing this today. We started putting in the AGM product as an option and I'm not sure what they are doing with these, but Trojan and Interstate both got the discharge and re-charge program yearly.
Bud
__________________
2020 28' Twin Flying Cloud
2021 F350 6.7 King Ranch
USAF Master Training Instructor (TI) & (MTI)- 68-72
Volunteer K9 Rehabilitator & Trainer
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06-16-2016, 02:22 PM
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#30
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Site Team
2009 25' FB International
2018 27' Globetrotter
Tavares
, Florida
Join Date: Mar 2014
Posts: 3,674
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Quote:
Originally Posted by AtomicNo13
SOC = state of charge
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Thanks. Now I need to research SOC meters. Do others find this a useful device?
In my trailer it shows level of charge by the color indicator on the monitor. I'm assuming this is not a very accurate indicator. Is that correct?
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06-16-2016, 02:26 PM
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#31
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Overland Adventurer
1991 34' Excella
2009 34' Panamerica
Telluride
, Colorado
Join Date: May 2012
Posts: 2,476
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Just buy a simple cigarette lighter plug in volt meter. Leave it plugged in all the time to see your soc at a glance. This is not rocket science. After a while youll instinctually know just where you are!
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07-13-2016, 08:35 PM
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#32
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Site Team
2009 25' FB International
2018 27' Globetrotter
Tavares
, Florida
Join Date: Mar 2014
Posts: 3,674
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Quote:
Originally Posted by AtomicNo13
Just buy a simple cigarette lighter plug in volt meter. Leave it plugged in all the time to see your soc at a glance. This is not rocket science. After a while youll instinctually know just where you are!
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I ordered one of these meters that plugs into the cigarette lighter from Amazon. I took about four weeks to get it but it works great.
Thanks for the recommendations.
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07-15-2016, 03:05 PM
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#33
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2 Rivet Member
2013 20' Flying Cloud
Roxboro
, North Carolina
Join Date: May 2011
Posts: 39
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Quote:
Originally Posted by NoResults
Even with the PD 4655 the charger never gets to storage mode just stays at normal mode of charging at 13.6 volts. I have not got the new batteries yet as I hate to make another 100 trip to the dealer so will have till wait till mid may for an appointment for other things.
Should I let the batteries set for a while then put it boost mode?
Thanks Dave
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"It's supposed to be a challenge, that's why they call it a shortcut. If it was easy it would just be 'the way'." ~ Rubin, "Road Trip"
__________________
__________________________________________________ ___________________________________________
"The most savage controversies are those about matters as to which there is no good evidence either way." Bertrand Russell
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07-15-2016, 03:07 PM
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#34
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2 Rivet Member
2013 20' Flying Cloud
Roxboro
, North Carolina
Join Date: May 2011
Posts: 39
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It takes my pd4655 a couple of days (at least)before it goes to float mode. I have 260 AH of lifeline AGMs
"It's supposed to be a challenge, that's why they call it a shortcut. If it was easy it would just be 'the way'." ~ Rubin, "Road Trip"
__________________
__________________________________________________ ___________________________________________
"The most savage controversies are those about matters as to which there is no good evidence either way." Bertrand Russell
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