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Old 12-01-2018, 04:31 PM   #1
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Battery life of original Group 27 and what to buy?

My original batteries which I believe to be un-branded Exide are over 3 years old. They seem to be holding up well being charged 24/7 at home and used down to 60% at the most while dry camping and quickly recharged the next day. But the last few times, it doesn't seem to take the charging a quickly. Curious, what life have you all been experiencing of the original battery? I had very poor luck with Interstate batteries in my previous Winnebago Minnie class C only lasting about 2 years. I would like as much ah as possible and ruled out most brands of flooded and also AGM's because of lower ah. The only one that seems to fit my needs would be the Trojan SCS200 with 115ah each. Comes with a hefty $175 price each. They say it's a real deep cell. I don't know if the Trojan 6 volts will fit in my step well battery compartment, I think they may be too high!
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Old 12-01-2018, 05:33 PM   #2
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My two Interstate Marine 27 series batteries last on average 4.5 years. Less than $100 a piece. And I abuse them regularly while boondocking.

Just got back from a trip with 20 degree nights and the heater ran fine all night, recharge batteries with generator the next day.
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Old 12-01-2018, 06:21 PM   #3
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Still using original Group 27s in our 2012 Solera. Seventh season on these batteries. Just returned from a trip to Washington State, one night without hookups - batteries did fine. I do have a 100 watt solar panel (Renogy with their PWM controller) which is continuously charging as needed, so they stay nicely charged in storage. Also, here in central CA the batteries are not subjected to severe temperatures when we’re at home.
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Old 12-01-2018, 06:34 PM   #4
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Interesting NMWildcat, my group 24 Interestates only lasted 24-30 months and I took good care of them. I wonder if they are the same batteries or could yours be a step up? I hope I can get another 2 years out of the Exides. Anyone out there using the Trojan 12volt not the 2 6volt?
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Old 12-01-2018, 06:54 PM   #5
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Quote:
Originally Posted by Sagecoachdriver View Post
Interesting NMWildcat, my group 24 Interestates only lasted 24-30 months and I took good care of them. I wonder if they are the same batteries or could yours be a step up? I hope I can get another 2 years out of the Exides. Anyone out there using the Trojan 12volt not the 2 6volt?
These are the ones I buy. Not the best, but for the $$$ they work fine for our RV. https://www.interstatebatteries.com/...ies/deep-cycle
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Old 12-01-2018, 07:11 PM   #6
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I use Walmart starting batteries and beat them to death often running them flat because I refuse to be held hostage by expensive battery technology. Only once did I turn in a battery before the 3 year replacement warranty (5 yr prorated). However, I do understand the desire to mess with state of the art battery/charging systems.
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Old 12-01-2018, 07:30 PM   #7
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I always wonder when people say their batteries last N years, how much battery capacity is actually left at that point.

I have one of those interstate batteries as a house battery in a boat. Hardly ever gets discharged much. After 5 years, it has about half it's capacity left. If it was in an RV, it would have needed replacing a few years ago.
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Old 12-01-2018, 07:38 PM   #8
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Quote:
Originally Posted by jeffnick View Post
I use Walmart starting batteries and beat them to death often running them flat because I refuse to be held hostage by expensive battery technology. Only once did I turn in a battery before the 3 year replacement warranty (5 yr prorated). However, I do understand the desire to mess with state of the art battery/charging systems.
I always laugh when you post this. Of course you used to say you were returning them to Walmart after you abused them in application they weren't designed for. You would even brag that you would return them before 3 years to get a new battery if you were going on a trip!
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Old 12-01-2018, 08:24 PM   #9
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Stagecoachdriver, have you ever pried off the plastic cover and checked the water level? If you haven’t done it, it would be a good idea. If the plates are exposed,new batteries time. To do better and save $, the best thing would step up to a group 31. More power but not a lot of cash and they will fit (barley) in a group 27 battery box. Our Sams club has them for $99. Jay
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Old 12-01-2018, 08:27 PM   #10
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Has anyone been able to get 2 Group 31's into the battery compartment in the step-well of a Forester or Sunseeker?
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