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Old 08-06-2015, 06:35 PM   #1
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Battery Life of House Batteries

Hi we have a 2014 Thor and our 2 house batteries have gone. We have only used it for 2 summers and put them in store mode when not using. When camping we are normally at KOA so plugged into power, When plugged into power, and the house batteries in use does that overcharge them, I am told yes and I am told no, Also how often have you had to change yours. I am also told that the new models of RV that the life of house batteries is 2-3 years, where olders ones can go 5-8. Input, thougts, things we should look for or be doing that maybe we are not, Not nice to have to pay 400 every 2 years for new house batteries has to be a way to extend t heir life. Happy RVing all.
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Old 08-06-2015, 07:51 PM   #2
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Not knowing your particular configuration, I'll try to answer you in general battery terms. When you say you have two batteries, I'll assume you have two 12V Deep Cycle Batteries for the house. Are they Flooded or AGM?

One of the most common failures of RV batteries is overcharging. With your handy dandy digital voltmeter, while plugged in to shore power, check the battery voltage. You should see 13.6 - a max of 13.8 VDC. anything higher will overcharge/overheat the batteries and reduce their service life.

Next, if you allow the batteries to discharge below 50% it will reduce their service life.

If they are flooded, check the water levels and make sure to maintain the water levels above the plates. Dry cells will reduce the service life.

Keep the terminals clean. Corroded connections will cause the converter to overcharge.

Attached is a link to some good bedtime reading that pertains to RV Battery Maintenance.

RV Battery Maintenance: Tips for Evaporation, Corrosion and Capacity
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Old 08-06-2015, 10:04 PM   #3
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Your 2014 coach should have a converter charger that will not over charge your batteries. They are most likely 12 volt marine deep cycle that are not the best battery for the coach like a good 6 volt golf cart type. You should get a good monitoring system like a trimetric and make sure you charge your batteries properly. Under charging them is also a killer and not everyone knows how to charge a battery properly. When you are plugged in, your batteries should be charging at 13.3 plus volts continuously and that will eventually bring them to a full charge and not over charge them. Yes, properly maintained batteries should last at least 5 to 8 years.
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Old 08-06-2015, 10:11 PM   #4
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Our 4 OEM Interstate U-2200 batteries in the '02 Dutch Star went 10 years and still were good enough to go through the entire night. I replaced them with basically the same ones.
Our present rig has 4 8D 12V AGM's and they are needing to be replaced. Since we bought the rig used we have no way of knowing how they were used/abused. They should go longer than just 6 years though! The cases on a couple are bulging and get hot when plugged in, neither of which is a good sign.
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Old 08-06-2015, 10:38 PM   #5
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Not sure a story about 4, 8D AGM batteries is going to answer the OP's question.

Are you storing your batteries over the winter connected and letting them go dead. A battery sitting dead is not going to last more then 1 or 2 seasons.

If you charge them full before storage and remove the cables, you have about 4 months before you need to charge them again.

If you use 2, 6 volt, golf car batteries, you will save money. They cost $90 to $110 a peice and will give you better service. That's what golf courses use and they need dependable batteries.

Until you get your battery care figured out, stay away from expensive batteries. They all die just as fast if abused.
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Old 08-07-2015, 09:03 AM   #6
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The typical batteries that come with a new RV are not the best for RV use and 2-3 years is about all that can be expected, especially with the RV in only occasional use. The charging system in your trailer may not be the ultimate best either, but it probably won't overcharge if left plugged in - that problem has been pretty much eliminated in the last 15 or so years.

The method of storing the RV is also important. If you keep the batteries charged up at all time (like your car does), they will last longer. If the RV sits for long periods and the batteries repeatedly go dead, they soon will no longer recover and die an early death.

So you can replace the typical marine/RV type 12v battery every 2-3 years, or buy a better deep cycle RV battery that can last 6-10 years with a bit of reasonable care. You may find this article I wrote on Choosing an RV Battery to be helpful:
Choose battery
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Old 08-07-2015, 11:38 PM   #7
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My coach has four 12 V house batteries, and were installed in July 2008 and still perform. They are from Costco RV/Marine type.
Replaced the two chassis batteries last year after a life of 9 years. Using the same Costco RV/Marine 12 V units.
Both, house and chassis batteries are charged with their own solar panel and controller.
I would recommend you look into installing a small solar panel and controller for your batteries.
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Old 08-10-2015, 11:45 AM   #8
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keep your fluids up that will kill abattery fast especially your house batteries with an inverter,


don't buy interstate one new one blew up in my face lucky not blind built wrong in mexico Trojans are the best
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Old 08-10-2015, 12:06 PM   #9
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Quote:
Originally Posted by Gary RVRoamer View Post
The typical batteries that come with a new RV are not the best for RV use and 2-3 years is about all that can be expected, especially with the RV in only occasional use. The charging system in your trailer may not be the ultimate best either, but it probably won't overcharge if left plugged in - that problem has been pretty much eliminated in the last 15 or so years.

The method of storing the RV is also important. If you keep the batteries charged up at all time (like your car does), they will last longer. If the RV sits for long periods and the batteries repeatedly go dead, they soon will no longer recover and die an early death.

So you can replace the typical marine/RV type 12v battery every 2-3 years, or buy a better deep cycle RV battery that can last 6-10 years with a bit of reasonable care. You may find this article I wrote on Choosing an RV Battery to be helpful:
Choose battery
Quote:
Originally Posted by CarlGeo View Post
My coach has four 12 V house batteries, and were installed in July 2008 and still perform. They are from Costco RV/Marine type.
Replaced the two chassis batteries last year after a life of 9 years. Using the same Costco RV/Marine 12 V units.
Both, house and chassis batteries are charged with their own solar panel and controller.
I would recommend you look into installing a small solar panel and controller for your batteries.
Gary RVRoamer
Only 2 - 3 years??

My RV battery experience has been similar to that of CarlGeo.

My original set of 4 Intrastate 12V deep cycle marine house batteries, and the second set, (Northern Battery 12v deep cycle marine), each lasted 9 years.

Mel
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(with 6 months on the 3rd set of 4 12V deep cycle marine house batteries)
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Old 08-10-2015, 12:16 PM   #10
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OP-

Find the battery's maker's (not necessarily brand) charging and maintenance recommendations. Follow them.


Here are Trojan's:


http://www.trojanbattery.com/Battery.../Charging.aspx
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Old 08-10-2015, 01:05 PM   #11
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Yup 2 to 3 years. When they sit dead over the winter they go bad. It's the same with boat batteries. If you overcharge them they cook to death.

On the other hand many batteries last much longer because people take care of them. Store them charged and fully charge them after each use.

With that said, battery life is not measured in years, but cycles. Those that last 9 and 10 years are not cycled often or deep. Instead they spend most of there life charged at home, while driving and then at the campground. The cycles are shallow and few.

Batteries are an expendable thing. The more energy you take out and more times you do, will determine there life.

Not much different then a flashlight battery. Leave it off and it lasts for years. Turn it on and you will get a few hours of light.

Look deep into battery specs and you will find that 12 deep cycle/marine batteries have about 600 cycles in them, where 6 volt GC2s have 1200 or more.

It's all in the care and use, not years.
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Old 08-10-2015, 07:39 PM   #12
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The OP did not mention where he lives. Cold winters on batters are tough. If in an environment like that remove the batteries and store them properly and they will last much longer
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Old 08-10-2015, 07:42 PM   #13
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Quote:
Originally Posted by twinboat View Post
Not sure a story about 4, 8D AGM batteries is going to answer the OP's question.
You must have missed the beginning of my post since it DOES relate to OEM battery life. Here it is again since you missed it the first time.

Quote:
Our 4 OEM Interstate U-2200 batteries in the '02 Dutch Star went 10 years and still were good enough to go through the entire night. I replaced them with basically the same ones.
BTW, ours were taken down to 11.9 volts many times although 12.0 was more normal.

Also, deep cycle and marine batteries are NOT the same even though you lump them together.
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Old 08-10-2015, 08:01 PM   #14
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Also, deep cycle and marine batteries are NOT the same even though you lump them together




I was referring to the HYBRID deep cycle/marine batteries.
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