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Old 04-20-2019, 08:46 PM   #1
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House batteries life?

So we have now had our 17 DS4310 for 2 1/2 years, wow does time fly by! Just curious in general how long should our house batteries last before needing replacement? Ours are always kept on as we have a 50 amp outlet on side of our house when coach isnít being used.

Thanks as always!
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Old 04-20-2019, 09:07 PM   #2
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Quote:
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So we have now had our 17 DS4310 for 2 1/2 years, wow does time fly by! Just curious in general how long should our house batteries last before needing replacement? Ours are always kept on as we have a 50 amp outlet on side of our house when coach isnít being used.

Thanks as always!
Are they AGMs? If so, you should have at least a couple of years life left...probably more. I figure that anything over five years on a house battery is a bonus.

All that said, anything man-made can fail...and, at any time.

TJ
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Old 04-20-2019, 09:31 PM   #3
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Quote:
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So we have now had our 17 DS4310 for 2 1/2 years, wow does time fly by! Just curious in general how long should our house batteries last before needing replacement? Ours are always kept on as we have a 50 amp outlet on side of our house when coach isnít being used.

Thanks as always!
It really depends on how you take care of them.

Do you make sure to never discharge them less than 50%?

NEVER, EVER let them get fully discharged?

My OEM Newmar AGMís are still going strong after 4+ years.
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Old 04-20-2019, 09:41 PM   #4
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OEM Interstate U-2200 batteries in our '02 DSDP lasted 10 years. Standard golf cart batteries, not AGM.
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Old 04-20-2019, 09:45 PM   #5
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The average summer time RV'er usually gets 7 years out of their batteries, even with an accident of full discharge or two. Others that full time can get 10-12 years. Periodic maintenance helps them last the longest. In storage, removing the ground leads helps them stay healthy.
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Old 04-20-2019, 10:37 PM   #6
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How long a battery lasts depends on what you expect out of it. Some folks that are connected to shore power most or all of the time and the batteries see only occasional light loads may carry on well beyond what might be considered a normal life. Technically speaking the batteries may actually no longer be delivering their rated capacity but if you don't need it, then they're still serviceable for you. At some point though the calendar will win, or they'll succumb to some other fate but if they're working for you then they're as good as new ones. If your demands are right at the limit of what a battery can deliver when new, then calendar life will ultimately be shorter than what you might expect because they'll only go so many cycles before even a normal amount of degradation puts them below the user's requirement. Throw in the vagaries of a less than perfect charge regimen, ignored for a cold winter or two and any number of less than optimum use and storage conditions and the useful life can be impacted. So with all those variables there's no way to predict what kind of life a set of batteries may have, because real life is nothing like the cycles defined in the data sheets.

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Old 04-21-2019, 12:08 AM   #7
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Usage, maintenance, and abuse are the variables.

Lots of dry camping with repeated discharge cycling to 50% DoD? Check the battery manufacturers chart - typical is expected about 500 for 6v lead acid deep cycke batterues, wet and AGM. So a couple three years could be normal.

If always nearly fully charged, on shore power most of the time. The charge cycles with little DoD can be thousands. So several years. 5+ is common.

Now for maintenance. Let a wet battery go dry and it will likely greatly shorten the life. Don't equalize, cutting off quite a bit of life, especially if dry camp often with deeper discharging.

Now for abuse. Let your battery get completely discharged to 3 or 4 volts, likely an be damaged then and there. Let then get discharged to 9-10v or so. Greatly shortened life. Sometimes you don't even know it occured. Your RV is in the shop for repairs. They run the batteries down, but recharge before handing it back to you.
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Old 04-21-2019, 04:40 AM   #8
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Brian, Our RVs were born around the same time. I'll be testing our batteries at the NKK Balloon Rally in October this year. It will be five days without hookups. I don't anticipate any problems but I will check them before we leave. Will let you know. The connections on mine were a little loose when I checked a year ago. You may want to make sure the connections are clean and torqued properly if you haven't already done so.
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Old 04-21-2019, 05:07 AM   #9
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My OEM Interstate 12v's are still going strong at 9 years. We don't do a lot of boondocking. When in storage, I have knife switches on the negative terminals that I open. Will probably replace them this year, just because.
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Old 04-21-2019, 05:35 AM   #10
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Brian, Our RVs were born around the same time. I'll be testing our batteries at the NKK Balloon Rally in October this year. It will be five days without hookups. I don't anticipate any problems but I will check them before we leave. Will let you know. The connections on mine were a little loose when I checked a year ago. You may want to make sure the connections are clean and torqued properly if you haven't already done so.


Thanks Paul & everyone else. Just something that came across my mind the other day. We do next to no dry camping, all use is on hookups or generator running. Guess we should be good for awhile. Iíll check the connections to make sure all looks good. Appreciate all the insightful comments!
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Old 04-21-2019, 05:45 AM   #11
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Any Battery can "Short Out" internally at any time........even new ones. Best to load test them from time to time to make sure they all are performing properly. A bad battery in the bank will take the life out of the other's.......and cause over charging.
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Old 04-21-2019, 06:07 AM   #12
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So on this topic and what brought it up last night & then it just happened again.

We are on 50 amp hookups. Twice now our AGS has kicked on saying due to low battery warning. Both times itís happened while my wife was cooking using the cook top and microwave, while the floor heat (all 3 zones) & water heaters were on. Not sure if too many items are on at same time could cause this to happen? I say this as we donít use floor heat much due to mainly being in Southeast but weíre in Atlanta right now and last 2 days itís been in the low 40ís. Thanks!
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Old 04-21-2019, 06:27 AM   #13
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House batteries life?

Our management system did load shed the microwave so Iím guess we must of overloaded both times...
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Old 04-21-2019, 06:58 AM   #14
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See if you have a Hybrid inverter/charger.

It will go to invert mode to supplement your incoming shore power and help keep things operating.

When that happens, the AGS may be detecting low batteries and start the generator to charge them. Probably won't though, because the inverter is in invert mode.

With AGS off, or set to a lower voltage threshold, the inverter/charger would switch back to charge mode once the load drops.
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