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Old 02-23-2006, 07:49 AM   #1
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Battery to heavy?

Got a chance to snag some Dynasty UPS12-475FR 134 AH batterys. The Trojan I have in there now is 66 lbs. The Dynasty is 110 lbs I am concerned because the battery in my coach is at the rear of the trailer in a corner. Any thoughts?
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Old 02-23-2006, 08:45 AM   #2
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Mike, an extra 44 pounds at an estimated 10 feet behind the rear axle applies a static torque of 440 foot pounds, which will tend to bend the frame by the axle, although the monocoque body will help to resist this. As a comparison, my Dodge 3/4 ton Cummins diesel truck has a maximum torque of about that, IIRC. The dynamic instantaneous torque when hitting a bump in the road would be much higher. If I wanted to fit the battery, I would make every effort to try to place it over the axles, or at least in front of them. Just my intuitive feeling, for what it's worth. BTW, I'll call you soon, as we haven't met for a while, and I'd like to see your generator and its propane conversion.
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Old 02-23-2006, 10:36 AM   #3
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I am with Nick about getting that battery away from the rear area. I have been contemplating mine and trying to decide if I want to relocate the Univolt and battery(s) while I have it gutted. Actually the Univolt is getting replaced with something lighter and quieter. I really have to wonder about the engineers that placed that much weight that far to the rear...must have been out having a beer and the installation crew made the decision for them I know by 1978? they had moved them to the front of the trailer kind of behind the gaucho...a much better location from a weight distribution stand point.

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Old 02-23-2006, 11:16 AM   #4
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Quote:
Originally Posted by wahoonc
...I know by 1978? they had moved them to the front of the trailer kind of behind the gaucho...
I can confirm that my '78 Sovereign (Birth date 8-8-77) had both the battery and the univolt between the front Gaucho and the front of the trailer. The Excella models for that year had two batteries mounted in the front - with an access door for each. The doors and batteries are mounted far to the left and right of centerline.

One thing to watch out for - the batteries were installed in plastic "boxes" which were accessible from the front hatch only - in my instance the plastic box had deteriorated, allowing rain and chilly breezes into the trailer, and allowing battery acid to boil over and attack the plywood floor of the trailer (not a good thing).

In order to get the battery (fumes and acid) out of the interior I mounted the battery on the outside tongue frame between the shell and the LPG tanks.

The univolt was mounted more or less centerline, just behind the front steel plate joning the frame and the shell.
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Old 02-23-2006, 01:31 PM   #5
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Originally Posted by wahoonc
Pick,
I am with Nick about getting that battery away from the rear area. I have been contemplating mine and trying to decide if I want to relocate the Univolt and battery(s) while I have it gutted. Actually the Univolt is getting replaced with something lighter and quieter. I really have to wonder about the engineers that placed that much weight that far to the rear...must have been out having a beer and the installation crew made the decision for them I know by 1978? they had moved them to the front of the trailer kind of behind the gaucho...a much better location from a weight distribution stand point.

Aaron
I would think that a 31 footer gives lots of options for where to put the batteries. In my 26 footer it or they will be at the forward edge of the front axel which is about the head of the center twin bed just tucking under the galley. Thinking of one 160 lb. 220AH unit well secured to the floor. Imagine that puppy bouncing around on dirts roads.
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Old 02-23-2006, 02:41 PM   #6
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Only problem with relocating the battery, is the fact that all the wiring terminates at the Univolt. I could relocate the battery in the closet or under one of the twins, I would just need to come up with some bigger battery cables. Not sure what type of batteries these are. They are either gel or AGM.
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Old 02-23-2006, 02:53 PM   #7
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To me the cost of relocating the batteries, (longer cables, etc) would well outweigh the issue of the 70's vintage long trailers, rear separation, broken frames etc. I figure every pound that I can move forward of the axle is going to add longevity to my unit. I have a rear bath with all of the associated problems but that was my choice. I love the size of the rear bath and I love the 70's vintage long trailers.

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Old 04-18-2006, 11:10 PM   #8
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Originally Posted by Over59
I would think that a 31 footer gives lots of options for where to put the batteries. In my 26 footer it or they will be at the forward edge of the front axel which is about the head of the center twin bed just tucking under the galley. Thinking of one 160 lb. 220AH unit well secured to the floor. Imagine that puppy bouncing around on dirts roads.
Hey, thats what I've been thinking...

I have been thinking of putting a Lifeline GPL-8DA under the curbside twin snugged up next to the wheel well and right over the axles. It's a LARGE and HEAVY battery (162 Lbs ) but it will give me 255 amp hours. I will replace the univolt with a lighter intellivolt model (60 amp) to help offset the weight and also provide better charging...

I am still brain storming this idea so if anyone has any pointers on this setup it would be much appreciated. (for example, what gauge battery cables should I use) The new charger will only be about 4 or 5 feet from the batteries in the rear bath closet.

Now what will I do with the empty battery compartment...

-T
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Old 04-19-2006, 06:18 AM   #9
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Hey, thats what I've been thinking...

I have been thinking of putting a Lifeline GPL-8DA under the curbside twin snugged up next to the wheel well and right over the axles. It's a LARGE and HEAVY battery (162 Lbs ) but it will give me 255 amp hours. I will replace the univolt with a lighter intellivolt model (60 amp) to help offset the weight and also provide better charging...

I am still brain storming this idea so if anyone has any pointers on this setup it would be much appreciated. (for example, what gauge battery cables should I use) The new charger will only be about 4 or 5 feet from the batteries in the rear bath closet.
Comment/Question Text -
I have a V-3 Razr and would like to connect a wired mic/head set to it thru the mini USB port. I noticed that your new SLVR has such an adapter and that you offer a head set that will utilize this port. Please provide the part # and location where it can be purchased.



Thanks!
-T



T-Man,

If your going jumbo on the battery, I would consider using 2-6 volt golf cart batteries (4C) in series for 12 VDC total. They will give you 220 amps but double the capacity in hours of discharge, are way smaller than an 8D and much earier to handle. Most of the big MoHo manufacturers went away from the 4D and 8D sizes and went to banks of 6V golf cart type units. Thay also have a higher # of re-charges, will last longer and coupled with a WFCO 75 amp converter with integrated smart charge, give you one powerhouse of a charging center.


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Old 04-19-2006, 11:30 AM   #10
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Battery replacement

Pick,
We just completed a replacement battery install for our CCD22. While we don't have issues of longer trailer and cables we did face whether to place new battery on tongue or inside trailer. Ended up placing under the front bed near center-line of trailer and same distance to the terminal block the original installation was (on the tongue). We are really happy with the 305ah battery (24hr rate) we got from Interstate Battery -- it is a Concorde PVX-2580L, 165 pounds Absorbed Glass Mat. Leakproof, virtually gasproof, approved by FAA for in-cabin installation on aircraft, really neat. I put photos on this forum last week and would be happy to answer any questions if I can. I am still hunting a decent inexpensive digital voltmeter to install in our unit instead of using the idiot lights on the monitor panel.
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Old 04-19-2006, 12:18 PM   #11
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DreamStreamr, would like to see those photo's! I am going to have to replace my Univolt. Last night, I checked the battery voltage, with the Univolt on. The meter was on AC, and it read 29 volts I guess the rectifiers are all shot.
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Old 04-19-2006, 01:08 PM   #12
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T-Man,

If your going jumbo on the battery, I would consider using 2-6 volt golf cart batteries (4C) in series for 12 VDC total. They will give you 220 amps but double the capacity in hours of discharge, are way smaller than an 8D and much earier to handle. Most of the big MoHo manufacturers went away from the 4D and 8D sizes and went to banks of 6V golf cart type units. Thay also have a higher # of re-charges, will last longer and coupled with a WFCO 75 amp converter with integrated smart charge, give you one powerhouse of a charging center.


[/size]
I've used Trojan six volt T-105s in the past and liked them but the factory battery compartment (rear corner) on my airstream will really only fit one group 24 battery and I do not want any additional tongue weight up front so I think I need to put the batteries inside the coach (near or on the axles)... thus the gassing becomes an issue. This is why I am looking AGM batteries

That said, I think the Trojans the best bang for your buck in terms of amp hours to dollars.
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Old 04-19-2006, 04:30 PM   #13
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... it is a Concorde PVX-2580L, 165 pounds Absorbed Glass Mat.
Hi Jim,

That's a nice battery and a nice install. Lotsa Boondocking ahead for you and Deb. Do you have any favorite secluded spots to camp in NC? Do you have a generator to charge up your new battery?

Sorry we won't see you at Galax this summer. Hope you'll reconsider. Last year was so much fun!
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Old 04-19-2006, 06:51 PM   #14
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T-Man,

They will give you 220 amps but double the capacity in hours of discharge,

[/size]
Please explain this in terms of spec reading. Do I understand you to say two 220 amp 6 volts with give up more juice than two 110 amp 12 volt or one 220 amp 12 volt?
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