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Old 07-10-2019, 10:25 AM   #1
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1991 34' Limited
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Battery suggestions

Good afternoon,
I just purchased a 1991 excella 34’ with duel batteries. The trailer was missing the batteries and I need to buy new. Thanks!
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Old 07-10-2019, 10:44 AM   #2
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If you're a Costco or Sam's member that's a good option for batteries.

I'm not 100% sure but I think group27s will just barely fit in your battery boxes, group 24s will be an easy fit. If the Group27s fit, you get a bit more amp-hour capacity from those.

Flooded lead-acid batteries are the cheap choice. Look for actual deep-cycle RV batteries, not the hybrid start-plus-deep cycles if you can. AGM batteries are a bit more tolerant of abuse, but many think they're not worth the price premium.

If the Excella has its original converter-charger, modernizing that might be worth it. I had good luck with a Powermax Boondocker converter-charger from BestConverters. No one ever complains about Progressive Dynamics "Intelli-power" converter-chargers (don't cheap out, get one with the ChargeWizard.)
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Old 07-10-2019, 10:44 AM   #3
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So many threads out there already. check here, http://www.airforums.com/forums/f449/ .

6v or 12v,
Lead Acid,
AGM-Absorbent Glass Mat,
Lithium,

How often will you be using them?
How much do you want to spend?

-Dennis
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Old 07-10-2019, 10:55 AM   #4
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Pair of group 27 deep cycle batteries. Flooded cell if you have the original converter. Walmart or other outlet. Group 27 fits tight but fits. Group 24 is lighter and smaller. As mentioned, an upgraded converter would be a good thing.
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Old 07-10-2019, 12:01 PM   #5
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Hi

Don't bother with the original converter. Pull it out and replace it. It's well past it's use by date and technology has advanced a lot since then. Avoid the "cheapest thing on Amazon" converters. You want at least one or two steps up from that.

Battery wise - what do you intend to do with the trailer? If you pretty much never run off grid, go for the cheapest deep cycle batteries Costco will sell you in group 24 case size. If and when they die, replace with the same thing. If you are planning to add solar and try to run off grid for weeks, figure that out first. You likely will put in more batteries than originally came stock.

Bob
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Old 07-10-2019, 03:25 PM   #6
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Hey bob I got a converter. It’s a 3000w AIMS POWER
GLOBAL LF Series. You think that will work?
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Old 07-10-2019, 04:34 PM   #7
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Originally Posted by Roger2347 View Post
Hey bob I got a converter. It’s a 3000w AIMS POWER
GLOBAL LF Series. You think that will work?
Looks like the "Global LF Series" is an inverter-charger handy dandy combo thing. It'll probably do a great job of charging batteries as long as you set it to the correct battery type to match what you buy.
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Old 07-11-2019, 06:08 AM   #8
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Thanks everyone! This is going to be a new learning experience and will be asking a lot more questions lol.

Thanks again for all the help!
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Old 07-11-2019, 09:07 AM   #9
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Hey bob I got a converter. It’s a 3000w AIMS POWER
GLOBAL LF Series. You think that will work?
Hi

There's a lot of setup on that unit. Plan on spending a while working out all the various issues with setting this or that. You do *not* want to get it set up to put 15V on your batteries on a regular basis ( ok, it's 14.8, but same thing ....).

Like all inverters, it pulls a lot of power. They go on and on about how low power it is. Eventually they toss out a "0.8 to 1.8% of full power" number.(page 11 in the manual).

Assuming that 3,000W is full power, that's going to be 24 to 54 watts. Put another way, its parasitic drain will be in the 2 to 4A range. Hopefully that drops a lot if you turn off the inverter section ( = make sure you can turn off the inverter section when you install it ....).

At least as far as I got in the manual, they don't mention the parasitic drain with the inverter off. Most of these units do have a drain even with the inverter off. That just comes with the way they build these beasts. The magic "brain" needs power to keep doing its thing.

Bob
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Old 07-11-2019, 09:56 AM   #10
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go Lion battery

we have Battle Born Lion, they work very well

longer life than lead acid
can go down to 10% of capacity vs 50% ( with reduce life)
are much lighter
same form factory

we moved our inside the AS and that reduce tongue weight

get a suitable controller
we are happy with the victron Muliplus inverter/converter
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Old 07-11-2019, 10:54 PM   #11
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So now it looks like I need a converter. I had the trailer plugged in shore power. The lights kept getting dimmer and dimmer.. until the batteries died. Any suggestions?? Thanks again!
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Old 07-12-2019, 07:58 AM   #12
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So now it looks like I need a converter. I had the trailer plugged in shore power. The lights kept getting dimmer and dimmer.. until the batteries died. Any suggestions?? Thanks again!
Hi

Does your planned use for the trailer include an inverter? If so combined charger / inverters are an option. The Victron Multi-2000 and Multi-3000 are options I would consider:

https://shop.pkys.com/Victron-MultiP...00_p_2554.html

https://shop.pkys.com/Victron-Energy...02_p_2431.html

Unless you just *have* to cram in in someplace (as I did) the 3000 is the obvious bang for the buck winner there.

Size of inverter or size of converter gets you into the size and number of batteries you plan to run. Are you going with "lowest cost from Costco" (which is fine) or a bank of six Battle Born lithium's (which is also fine, and a *lot* more money). A 3,000 W inverter or 100A charger is not what you want for the two group 24's from Costco, but fine with the lithium's.

There are a lot of basic converters out there for a simple setup. Expect to pay about $200 or so for a reasonable one. Even with a "better" one, there's no guarantee it will be 100% perfect. Best Converters has a lot of happy customers on the forum.

Bob
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Old 07-12-2019, 08:12 AM   #13
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Quote:
Originally Posted by Roger2347 View Post
So now it looks like I need a converter. I had the trailer plugged in shore power. The lights kept getting dimmer and dimmer.. until the batteries died. Any suggestions?? Thanks again!
Batteries, and controller, good. Ok Here is a place to start. http://www.airforums.com/forums/f449/

Progressive Dynamics make a very good quality units.
https://www.amazon.com/dp/B0039T059U..._t2_B000GASX9O

I have a Blue Sky 3024i with pro remote that works flawlessly.
https://www.amazon.com/dp/B0039T059U..._t2_B000GASX9O

What about solar as well? You might want to plan for that at this time even though you may not POP for it now. Figure out a design, plan for wiring and components. Sorry getting ahead of you hear.

-Dennis
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Old 07-12-2019, 08:35 AM   #14
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Quote:
Originally Posted by Roger2347 View Post
So now it looks like I need a converter. I had the trailer plugged in shore power. The lights kept getting dimmer and dimmer.. until the batteries died. Any suggestions?? Thanks again!
I thought you had a huge (3kw) inverter-charger? AIMS Power Global LF?

If you have that and it's wired in properly it should charge your batteries when you're on shore power.
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