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04-23-2019, 09:24 AM
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#1
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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2 Batteries in a 33IK
It's time to replace the battery on my 2016 Silverback 33IK. FR advertised being able to store (3) batteries. I think they were talking lantern batteries .
The existing battery is a series 27 and weighs under 60 pounds. Most 6V golf cart batteries weigh that much each. Looking at the trailer and supports for the battery shelf, I'm not confident it can handle 120 + pounds of batteries.
Anyone doing this?
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2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-23-2019, 05:14 PM
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#2
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Senior Member
Join Date: Jan 2015
Location: Kansas
Posts: 1,272
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Not going in to the advantages / disadvantages of 6 volt in series vs. 12 volt in parallel … I went with two 12 volt 650 amp Excide Marine/RV batteries wired in parallel. They measure 6.5" X 10" X 9" and weigh 44 pounds each. I made a wooden battery tray that fits inside the existing battery compartment that cradles them both very well. They both can be easily removed or installed without clearance issue. We don't boondock much and have had no issue with lack of capacity. As for three batteries you spoke of … it would never happen in the battery enclosure on my 2016 … just not enough room.
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04-23-2019, 05:34 PM
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#3
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,554
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Every 5th wheel I've looked at, has always had room for at least 2 batteries.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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04-23-2019, 09:52 PM
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#4
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Senior Member
Join Date: Dec 2015
Location: anywhere we want
Posts: 288
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We have 3, 12volt in 35ik.think same compartment.
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04-23-2019, 10:20 PM
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#5
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Senior Member
Join Date: Jan 2013
Location: Space Coast of Florida
Posts: 3,954
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I have 2, 6 volt batteries in my 2016 33IK no issues...
I haven’t noticed any signs of weight issues. Structure seems fine.
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2016 Siverback 33IK, Towed 50K+ mile
2018 Ford F-350 Lariat 6.7L V8 Diesel 4WD Crew Cab
"If you don't know where you are going, any road will get you there."
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04-23-2019, 10:35 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,263
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Have you looked at "Lithium" batteries. 100 amp hour LiFePo batteries are a BCI group 27 size, weigh 30 lbs each, and can be drawn down the full 100 amp hour DOD with no loss of capacity. 60 pounds of batteries (2 X 100 ah) will provide a full 200 amp hours of power while a pair of lead acid (either 2 x 6v's in series or 2 12v's in parallel) will only have half that available due to the ""50% rule".
Yes, they are more expensive but they become less expensive every time you pass one of those "My batteries are getting old and don't last as long" events and don't have to buy new batteries. I don't sell 'em so it matters not to me what people choose, just pointing out the benefits. I can honestly say I'll never have to buy another set of batteries after I changed.
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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04-24-2019, 06:22 AM
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#7
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Senior Member
Join Date: May 2014
Location: IL
Posts: 1,295
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Hi,
I have had two Trojan T-105's (with added venting) in the existing slot for four seasons and maybe 8-9,000 miles now, in my 2024 Silverback 33.
No indication of any structural problems, and the remote watering system makes upkeep a snap.
FWIW.
Rich Phillips
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Rich Phillips
2019 K-2500 Duramax Crew Cab
2014 Silverback 33RL
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04-24-2019, 09:52 AM
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#8
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Dieselguy - thanks, never thought about (2) 12 volt batteries . . .
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2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-24-2019, 09:58 AM
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#9
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Thanks all, but need more info
Thanks everyone, lots of options / ideas.
BUT, still have questions. The battery bay is about 21" wide by 10.5" deep and 15" high. The door opening is slightly smaller in width, so getting (2) Trojan T-105's looks like it could be an issue. For those that have (2) 6V, can you provide battery specs? Or those that have multiple batteries, can you measure your bay / provide pictures? I don't know if I can justify the lithium, but I understand the longer you have them, the more economical they are. Thanks again, looking forward to more info.
__________________
2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-24-2019, 12:41 PM
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#10
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Senior Member
Join Date: May 2014
Location: IL
Posts: 1,295
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Hi NCBBA,
My battery compartment's entry door is yight, but the bottom actually is a portion of a flat surface area that extends to the right, and into the bottom of the larger compartment where the water controls are located.
My Trojans sit side by side lengthwise, and reach right to the edge of that larger space. Good access for my watering system hose from that end, as well for my solar wiring.
If I can get some pictures later today I'll post them.
Hope this helps.
Rich Phillips
__________________
Rich Phillips
2019 K-2500 Duramax Crew Cab
2014 Silverback 33RL
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04-24-2019, 02:17 PM
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#11
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Senior Member
Join Date: Jan 2012
Location: Upstate New York
Posts: 190
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Quote:
Originally Posted by NCBBA11043
... For those that have (2) 6V, can you provide battery specs? ...
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Here are the specs for Trojan T-105 6V batteries. https://www.trojanbattery.com/product/t-105/
These are 10.3" length, so they should fit in the 10.5" depth.
A Trojan group 24 12V battery I looked at was 10.92" length.
Are you sure the compartment depth is 10.5"?
__________________
Chris and Pat
2023 Ram 3500 Cummins Aisin Dually, Auto Flex Air Ride Rear Suspension, B&W RVK3600 hitch
2022 Grand Design Reflection 303RLS
2024 Winnebago Minnie 2327TB B&W Continuum Hitch
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04-24-2019, 07:16 PM
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#12
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Senior Member
Join Date: Nov 2017
Location: Dayton Ohio
Posts: 3,566
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4 Costco six volt gc2 batteries fit in my cedar Creek Hathaway.
Measure. For six’s provide over 400 amps. Heavy though.
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04-25-2019, 02:39 PM
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#13
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Quote:
Originally Posted by racer4
Here are the specs for Trojan T-105 6V batteries. https://www.trojanbattery.com/product/t-105/
These are 10.3" length, so they should fit in the 10.5" depth.
A Trojan group 24 12V battery I looked at was 10.92" length.
Are you sure the compartment depth is 10.5"?
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Yep, measured several times. Here's a pic so you can help verify. The tape measure body is 3", so add 3" to what it shows...
It reads 18-1/2" x 7-1/2". That's why I'm concerned about if 2 trojans would fit. (I guess I could have phrased that better)
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2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-25-2019, 05:30 PM
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#14
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Senior Member
Join Date: Jan 2012
Location: Upstate New York
Posts: 190
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Since the Trojans fit is so close, I would measure with a folding wood rule like https://www.homedepot.com/p/Lufkin-6...6SLN/203809078
If there is more than 10.3", then the Trojan T-105 should fit.
Watering the batteries will be difficult without a watering system installed. I used Trojan Hydrolink, Flow-Rite looks good too.
If you put two batteries in, you can probably put them in the compartment with your hands. Trojan also sells a "Battery Lifting Strap". https://www.amazon.com/Trojan-609628.../dp/B00699WCUM
__________________
Chris and Pat
2023 Ram 3500 Cummins Aisin Dually, Auto Flex Air Ride Rear Suspension, B&W RVK3600 hitch
2022 Grand Design Reflection 303RLS
2024 Winnebago Minnie 2327TB B&W Continuum Hitch
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04-26-2019, 04:24 PM
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#15
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Member
Join Date: Feb 2017
Posts: 75
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We have 2 trogen 6v in our 33ik. Watering was a challenge so I installed a watering system. Batteries fit well. I made a wood block so they can’t move around front to back. Side to side there is very little clearance. Great batteries
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04-26-2019, 05:17 PM
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#16
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Quote:
Originally Posted by narrowsboy
We have 2 trogen 6v in our 33ik. Watering was a challenge so I installed a watering system. Batteries fit well. I made a wood block so they can’t move around front to back. Side to side there is very little clearance. Great batteries
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Thanks! Pulling the trigger, pick them up next week.
__________________
2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-26-2019, 05:18 PM
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#17
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Quote:
Originally Posted by narrowsboy
We have 2 trogen 6v in our 33ik. Watering was a challenge so I installed a watering system. Batteries fit well. I made a wood block so they can’t move around front to back. Side to side there is very little clearance. Great batteries
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What watering system?
__________________
2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-27-2019, 07:05 PM
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#18
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Member
Join Date: Feb 2017
Posts: 75
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04-28-2019, 10:26 AM
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#19
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Senior Member
Join Date: Feb 2015
Location: Ohio
Posts: 216
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Quote:
Originally Posted by narrowsboy
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Thanks!
__________________
2023 Silverado 3500HD CC Long Bed Diesel DRW
2016 Silverback 33IK
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04-28-2019, 02:32 PM
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#20
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Senior Member
Join Date: May 2014
Location: IL
Posts: 1,295
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Hi,
Finally got around to taking pictures of the double Trojan installation in my 2015 33RL.
They are mounted front to back, and live in Walmart-origin plastic containers with clamp tops, to pipe any gas out through the stock vent just above the access door. Also visible is the black hose that mates up to the pump for my watering system.
Hope this helps.
Rich Phillips
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