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Old 10-12-2021, 04:25 PM   #1
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Dead Batteries

It appears our new to us 2013 Era70a needs new house batteries. What would be best batteries to use for replacement. I know the ones in it now are AGM a
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Old 10-12-2021, 04:37 PM   #2
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Well, you first need to see what will fit. The first step is to look at your existing batteries. Somewhere on the label you will see the numerals 24,27 or 31 most likely. These are the Group size. Look on this chart to get the dimensions of the group. If you don't see these numbers, try to match what you have to one of the groups.

Group SizeLxWxH (inches) LxWxH (cm)
Group 24 Batteries 10.25 x 6.8125 x 8.875 26 x 17.3 x 22.5
Group 27 Batteries 12.0625 x 6.8125 x 8.875 30.6 x 17.3 x 22.5
Group 31 Batteries 13 x 6.8125 x 9.4375 33 x 17.3 x 24
Group 34 Batteries 10.25 x 6.8125 x 7.875 26 x 17.3 x 20

Here is the link if the chart above is hard to read: https://www.batteryequivalents.com/b...ize-chart.html

Sometimes you can put bigger batteries in the space where your existing ones are. You will have to measure the space and compare to the dimensions above.

Then consider the type. I doubt if you need lithiums, so your choices are flooded cell lead acid (FLA) or AGMs. FLAs have filler caps and need periodic checking of the electrolyte level and water addition. AGMs do not have filler caps and require no periodic checking and water addition. That is what I chose for my MH.

I bought two Group 31 WindyNation batteries on Amazon (FLAs can't be shipped so Amazon doesn't sell them) for $385 for the pair and they have worked very well.

David
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Old 10-12-2021, 05:14 PM   #3
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Since the Era is a Sprinter Based B-Van you probably don't have a lot of room. Here's the wiring diagram for the 2013 Era 70A:

https://www.winnebago.com/Files/File...ire_180438.pdf
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Old 10-12-2021, 09:10 PM   #4
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Any reason to not buy what you already have?

1. Are they OEMs that lasted 8 years?
2. What brand mfg are they and how many AHs?
3. Did the batteries ever cause you hardship before going bad; if so: what was the concern?

But since you asked a question; I will answer with a lot of assumptions being made.

In my opinion the best Pure AGM are the VmaxTanks.

However they are very pricey right now. https://www.amazon.com/VMAXSLR125-2-.../dp/B00NLQQE1E

If I were to buy today, I would follow the advice of David M above an get the 2 Windy Nation for under $400. When I bought my Vmax tank, I got a pair for $500. They have made all the difference in the world to me. But I can't in good conscious recommend someone to pay $670.

Another option is to buy the Duracell Dual RV / Marine AGM from Sam's. Last I heard they were $179 each? But the Pure AGMs are better i.e. Windy Nation or Vmax tanks
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Old 10-13-2021, 06:26 AM   #5
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Quote:
Originally Posted by dkoldman View Post
Another option is to buy the Duracell Dual RV / Marine AGM from Sam's. Last I heard they were $179 each? But the Pure AGMs are better i.e. Windy Nation or Vmax tanks
The Sam's Club batteries are dual purpose starting/deep cycle batteries so I don't recommend going that way unless that's what you've had and were perfectly happy with them. You'll be much better off with true deep cycle batteries like the other options mentioned.

Here are a couple more options:

https://www.amazon.com/Renogy-Batter...21&sr=1-3&th=1

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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