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Old 04-25-2015, 11:23 AM   #1
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Need to buy batteries?

So we pick up our new 3210 Toy Hauler in under two weeks. The dealer said it doesn't come with a battery, so we need to supply one. Sounded odd, since I think just like with a car, a battery is necessary -but I'm noticing there are more steps involved in picking up a trailer. Whatever it is, it is I guess -but I don't know what to get, other than I'm told to get a "Deep Cycle" battery. I figure I may as well get two of them as there appears plenty of room, and just wire them in parallel so we have more capacity in between generator runs... (We will be doing a lot of dry camping without hookups.)

Are there recommendations for what to get? Specific sizes? I don't have enough info to make a purchase, but my timing is getting short to get the batteries, then charge them and drop off at the dealer so they're in and ready when we do our inspection and walk through.

A little help please??? Looking forward to my next great family adventure!
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Old 04-25-2015, 11:33 AM   #2
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well I don't have a toy hauler but mine came with an interstate dual purpose battery or a dp for short. The only thing I wonder about with the deep cycles is that I know from boating the deep cycles I thought were designed to be run down quite a bit and then recharged, and with the convertors even though they are supposed to be smart equipped do they understand the charging cycles of a deep cycle? The dual purpose is sort of a hybrid of the starting which is charging immediately after start and the deep cycle which is designed for extended use with no charge? Am I correct in this assumption or will the convertor charge accordingly
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Old 04-25-2015, 11:34 AM   #3
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Oh an as to it not coming with batteries that seems weird mine had a brand new battery installed by the dealer when I picked it up
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Old 04-25-2015, 12:29 PM   #4
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Odd that you dealer isn't providing a battery, but honestly you are probably better off getting what you want to meet your needs.

Dual 12v in parallel or dual 6v is series is probably the first decision you need to make. There are very solid arguments for either 6v or 12v, I made the decision for 12v because I wanted lighter and more portable since I pull my batteries and store in my garage on a battery tender. Plus I take my Honda EU2000 if we ever camp without electricty. This means I don't need the deeper depth of discharge the 6v allow. Additionally my dual grp 24 12v provide ~170 Amp Hrs vs ~200 Amp Hrs with GC2 6V and I haven't found myself wanting for more amp hours. Lastly the dual 12v were considerably less expensive. However if you will camp without elec or generator and plan to really extend time between generator runs dual GC2 may work better for you. It also seems folks who rely on solar for charging, or want to run an inverter to provide 120v AC for certain appliance also prefer 6volts.

Personally I buy batteries at Costco. They offer great prices, warranty and zero hassle if you need to return something. My Costco went from private label batteries mfg by Johnson Controls, to actual Interstate branded batteries still manufactured by Johnson Controls.
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Old 04-25-2015, 12:29 PM   #5
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Interesting - thank you! I have contacted the dealer to confirm that like two of the 4 TVs this thing has connections for, it doesn't come with the battery either... We'll see.

As for usage, I really don't know - this is my first trailer. I know it has the Onan Cummins 5500 generator, and whatever controller that Jayco installs with it. We will be about 5-7 days at a time each time we stop and will be running the generator while there. But what does that mean for usage? I don't know. Can I control how far down the batteries can go before firing up the generator? I hope so -that's my intention, to install extra battery capacity and top them up while we are off on the trails, versus having the generator run, under our bed, while we're trying to sleep....

Sorry, I'm not much help - too new!
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Old 04-25-2015, 12:38 PM   #6
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The TH will come with a battery gauge, it's a series of 4 LEDs representing Empty, 1/3 full, 2/3 full, and Full. It would work to periodically spot check capacity. Much more accurate gauges can be wired in that will show exact voltage coming from the batteries which is the correct way to determine DOD.

I suspect if you have onboard Onan Generator that you run it at least daily for a couple hours and that should plenty to keep your batteries topped off.

Dual 12v or 6v will be great for you.
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Old 04-25-2015, 12:40 PM   #7
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By the way, we typically run our generator for a couple hours in the morning when making breakfast/coffee. Sometimes if we need 120v appliance to cook dinner we run again the evening. Never have I run it all night.
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Old 04-25-2015, 12:58 PM   #8
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Excellent suggestion and probably not difficult to set up. This my be a ridiculous question, but is there a particular size, as in physical LxWxH dimensions/"RV Size" I should be looking for?

Costco seems to have about 100 different sizes and I have zero direction in this.
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Old 04-25-2015, 01:06 PM   #9
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I think mine is a group 24 or 27 cant remember right off hand
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Old 04-25-2015, 01:55 PM   #10
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I have never had a TT or FW that didn't come with a battery, including the PINNACLE we just bought which came with two. Also how can you safely leave the dealer's lot without a battery since you will have no power for the break-a-way switch for the brakes.

Something is rotten in Denmark in my opinon.
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