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Old 12-11-2020, 05:07 PM   #1
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Interstate RV House Batteries

I have been told that these batteries should be changed every two years. With proper maintenance shouldn’t these batteries last longer.
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Old 12-11-2020, 05:12 PM   #2
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I have been told that these batteries should be changed every two years. With proper maintenance shouldn’t these batteries last longer.
I wonder who is passing that information around?

I've run Interstate group 27 deep cycle batteries for as much as 6 years before they showed any sign of loosing their usefulness. Just charge as quickly as possible after discharge and check electrolyte regularly. Avoid discharge greater than 50% and they should last WELL OVER two years.

Of course running them near dead and waiting before recharging, you might be lucky to get two years.
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Old 12-11-2020, 05:15 PM   #3
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I abuse the heck out of my two Interstate series 27 marine batteries. Mine last 4.5 years on average.
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Old 12-12-2020, 11:04 PM   #4
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Maintained properly with correct charging and keeping the cells full will get you long life, at least 5 years. If you step up a bit in price, then I would go AGM. They require no maintenance other than correct charging. Taken care of these will go almost 10 years!

Then you've got the new LIfePo (Battle born) batteries that are the best, but at $950 each you would have to really love using batteries a lot!
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Old 12-13-2020, 08:48 AM   #5
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They're as good as anything else I've tried, as long as you maintain them and don't let them discharge way down. I recently put a $60, 10a solar panel on my pin, and it keeps them topped off nicely, without overcharging them. I'd say they're good for 3-4 years.
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Old 12-13-2020, 09:24 AM   #6
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Assuming that you keep up with the water level. Do not discharge them over 50% because you have a battery monitor. And the charge is maintained.

You should expect 5 or more years. Deep cycle last the longest. GC2’s.

However, the warranty is usually one year. Because that is how quickly they can be damaged.

Marine batteries are typically 300 cycle batteries. But, that is usually a long time. Deep cycle batteries are 600-1000.

So, the two year thing is not completely incorrect.

It is up to you!
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Old 12-13-2020, 10:50 AM   #7
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i love AGM GRP.27 FROM ADvance auto parts in texas. 150.00 with a RETAIL ME NOT .COM. COUPON CODE
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Old 12-13-2020, 11:46 AM   #8
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If I needed batteries it would be 2 Costco GC2's, $90 each.. An Amazon battery monitor $40.

6 level indicators for the batteries, about $40.

$260 and you get 215 amps. Should last 6-8 years. Guaranteed to run the heater overnight.

Lithium is cool but, about $1500.
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Old 12-13-2020, 01:31 PM   #9
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If you have room for two 6 volts batteries, wired in series, is the way to go.. Another tip is to use a Hydrometer to check the specific gravity to check the charge condition of each cell...(Napa has a good one for around $10). I using Interstate batteries now for 4 years .. still running strong.. Don't let them go thru winter outside without charging properly if you are in cold counrty..
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Old 12-13-2020, 01:33 PM   #10
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I have been told that these batteries should be changed every two years. With proper maintenance shouldn’t these batteries last longer.
I have a 5 year old sun seeker that came with interstellar 27s from the factory and have had to replace them twice and got no support from interstate
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Old 12-13-2020, 01:40 PM   #11
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I have a 5 year old sun seeker that came with interstellar 27s from the factory and have had to replace them twice and got no support from interstate
It's probably because Interstate is just Earth based so far
Sorry, couldn't help myself.....
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Old 12-13-2020, 01:44 PM   #12
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Batteries

If you have the room, go w/ group 31's or 2 -6 volt golf cart batteries. The 2-6 volt are best if you are discharging them regularly, but if you have 1 goes bad you you do not have 12 volts. Also, if 1 goes bad you have to replace both.
If you have group 27's the group 31's are slightly taller. On the group 31's I having been getting an extra year out of them, usually 3 years.
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Old 12-13-2020, 01:44 PM   #13
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I've run Interstate group 27 deep cycle batteries for as much as 6 years before they showed any sign of loosing their usefulness. Just charge as quickly as possible after discharge and check electrolyte regularly. Avoid discharge greater than 50% and they should last WELL OVER two years.
When it is time for the house batteries to die, do they all go at once, or do I get some kind of warning? My batteries are entering their 6th year. Most of the time they on shore power.
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Old 12-13-2020, 01:51 PM   #14
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I start testing mine at four years for bad cells. If you boondocked, you will quickly notice reserve capacity loss. If you are only at hookups, about the only way you will know is when they completely die if you dont have a tester.
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Old 12-13-2020, 01:53 PM   #15
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I start testing mine at four years for bad cells. If you boondocked, you will quickly notice reserve capacity loss. If you are only at hookups, about the only way you will know is when they completely die if you dont have a tester.
Thank you, I test them when I add water every 6 months or so.
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Old 12-13-2020, 02:33 PM   #16
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I have been told that these batteries should be changed every two years. With proper maintenance shouldn’t these batteries last longer.
Yes. They should. Some of those batteries come with a 2 year warranty. So if you trade them in after 2 years, you're just buying a new battery with a warranty. Good for the salesperson, not so good for the purchaser.
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Old 12-13-2020, 02:45 PM   #17
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Originally Posted by TitanMike View Post
I wonder who is passing that information around?

I've run Interstate group 27 deep cycle batteries for as much as 6 years before they showed any sign of loosing their usefulness. Just charge as quickly as possible after discharge and check electrolyte regularly. Avoid discharge greater than 50% and they should last WELL OVER two years.

Of course running them near dead and waiting before recharging, you might be lucky to get two years.
I use interstates with very good luck. During the winter I take the batteries out of the trailer and I put them on a battery conditioner charger. It helps to extend the life
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Old 12-13-2020, 03:19 PM   #18
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I have 4, 6 volt Interstate battery's in my Cedar Creek that are over 6 years old and are still good.
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Old 12-13-2020, 07:21 PM   #19
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I put two 6 volt Interstate Deep Cycle batteries in my new 2013 motorhome and they still work ok after 6 years. I don't do a lot of dry camping, and have a 80 watt solar panel on the roof.
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Old 12-13-2020, 07:44 PM   #20
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I mostly change my RV (and car/truck) batteries every 5 years weather they need it or not.
Accept for my 7x14 utility trailer, its going on its 8th year with a Walmart 27 series DC, but its now acting as a storage shed. I charge this 12v battery every month or so to exercise my Harbor Freight 3500 inverter generator that I store inside the trailer.



I still can't buy into this lithium price. 7 x more, to last 2x as long. OK, so because you can run than down further, 1 $900 battery will give you the same as $300 worth of lead acid. and if lead acid last 5 years, and Lithium last 10 years.
4 lead acid batteries = $600
1 lithium - $900.


I bought a 2018 off road racing bike with a $150 lithium battery they installed to save 5 lbs. it lasted 6 months. I replaced it with a $35.00 walmart AGM that is still working great.


Forgot to add, when I had my own Auto shop in the 80's, I only sold interstate batteries.
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