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Old 02-14-2019, 12:11 AM   #1
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coach battery

What type of battery did my 2013 36rl come with need to replace and think the one that are in it are the wrong ones ?
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Old 02-14-2019, 12:27 AM   #2
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If the RV is new to you, and the batteries are older than a few years - I would just replace them. My dealer had installed one group 27 (haha, way too small) but I soon replaced it since the inverter requires more Ah's. I now have 2 - 6v batteries wired in series for 12v and apx 220Ah's now, and the batteries are in the 2 battery box's that came from the factory.

One day when I have to replace these 2 again, I might go with 4 - 6v for 440Ah's. I have found a 4 place battery box that might work but will wait till I really need it.

Good Luck!
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Old 02-14-2019, 12:49 AM   #3
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my batts froze and they are marine/rv 400cca? there is only 2 of them . What is the correct ones that this coach takes?
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Old 02-14-2019, 12:59 AM   #4
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Batterys are dealer installed , really just depends on how good the dealer is. My feeling is two group 27 is the bare min. If you have a inverter more is better , without shore power your frig may only run 6~10 hrs with out a charge on a very hot day.
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Old 02-14-2019, 02:01 AM   #5
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Quote:
Originally Posted by joshua View Post
my batts froze and they are marine/rv 400cca? there is only 2 of them . What is the correct ones that this coach takes?
Cold cranking amps aren't going to help in a rv application. You need a pair of deep cycle rv/marine type, minimum group 27, batteries wired parallel or at least 2 6v golf cart batteries wired in series. The brand or where to buy is up to you, but Sams or Costco usually have decent prices on both.
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Old 02-15-2019, 02:56 AM   #6
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Do u need agm or lead core. There is a big difference in price. If my box will fit a 31 over a 27 ? What is your thoughts on that.
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Old 02-15-2019, 03:06 AM   #7
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Another topic of many points of view. Just sayin' we bought our coach new in April 2013 and had dealer put in Diehard Platinum Marine Group 31's AGM's. I had them load tested before heading south late this last summer.........an independent battery wholesaler said "They still load test within specs." Unfortunately Sears no longer sells this battery, but I think the larger the battery the better. If you want to spend more, some will advocate 4 6V golf cart batteries, but those require periodic maintenance. So you have to make your own decisions about what meets your own needs.
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Old 02-15-2019, 12:26 PM   #8
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I used two Trojan T-145 6V in series for my RL.
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Old 02-15-2019, 01:35 PM   #9
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If you really depend on your batteries, I would recommend getting true deep cycle batteries over RV/marine type batteries. Generally, when looking for RV batteries, don't look at cca ratings, look at amp/hours. True deep cycle will last longer than an RV/marine battery. If GC2 size fits your boxes, they can be bought at Costco, Sam's, etc at reasonable prices. Also price golf cart stores, there's a good chance to get a decent price there too. These are 6 volt that I'm talking about, so you will have to wire them in series.
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Old 02-15-2019, 02:35 PM   #10
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The advantages of AGM batteries are they can be installed in an unvented area, but I still don't recommend that, and the battery area in your Redwood is vented, so that's a moot point. The AGMs are no maintenance as far as having to add water, but connections should still be checked on a regular basis. I recommend checking with the AGM battery manufacturer on the charging curve and ensure the charging system you use is compatible with the batteries. AGMs don't charge the same as a lead/acid battery. And yes, they are more expensive.
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