Jayco RV Owners Forum

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Old 04-05-2014, 02:52 PM   #1
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New Jayco Owner - 154BH - Going to 6V batteries

My family and I are proud new owners of a 154BH Baja we tow behind our Cherokee. First trip out two weeks ago and the biggest issue we had was the little interstate RV/Marine stock battery packing it in after 1.5 days. We weren't overly conservative with the power usage but we had to find out what it could/couldn't do... 1.5 days wont cut it...

I've got LED bulbs on the way from Amazon and and I just bought a pair of 6V Crown CR-260's and beauty battery box to swap in. Just fabing up the custom mount right now and will post pictures back later today. My hope is the CR-260's will give us piles of extra battery power..

Next project is to replace to rinky-dink wiring Jaycon does from the battery to the fuse panel. If anyone has a Jayco wiring diagram or electrical diagram for the 154BH I'd love a copy.. they wouldnt share one with me..


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Old 04-05-2014, 03:04 PM   #2
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Welcome to the JOF and congrats on the new TT!

'12 Jay Flight 28BHS
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Old 04-05-2014, 04:09 PM   #3
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Enjoy your new Baja. Looking forward to seeing your pictures.
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Old 04-05-2014, 09:36 PM   #4
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Pictures attached as requested.. I'll post more once the batteries are in and the new wiring is done.. Have to figure out what gauge wire to use and whether I want to re-run all the way to the fuse panel... the insulated bottom is now a blessing and pain

My buddy Chris @ Absolute Fabrication fab'ed up the diamond plate base. Glad to have friends with plasma tables
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Old 04-05-2014, 11:06 PM   #5
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You may wish to keep in mind that the absorption charge voltage is 7.75 VDC per battery which equals 15.5 VDC. This is a much higher voltage than most RV converters can provide. This means that you will need to provide separate charging system from your RVs converter. I built a setup for my JayFlight 29BHS and had to add additional charging because I was constantly undercharging the batteries.
Old setup:
2004 Chevrolet Silverado 3500 LT with a 2004 Jayco JayFlight 29BHS
2014 Greyhawk 31FS with a 2007 Tahoe toad
New setup:
2014 Thor Palazzo 33.3 with a 2007 Tahoe toad
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Old 04-06-2014, 10:06 AM   #6
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What converter or charger did you swap in? Also where on the spec sheet for the CR-260's did you see the absorption charge voltage requirement.. I saw 2.37 VDC per cell in phase 1 and Phase 2 charging..

I was also planning on bring them home after every trip and maintaining them on my battery charger/maintainer.

Thanks for the feedback!!
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Old 04-20-2014, 11:29 PM   #7
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Thought I'd follow up after our first trip with the 2 x Crown CR-260's. Actually had more than adequate energy for the entire weekend. Everything ran flawlessly and we had plenty of capacity to spare. 3 Night trip with furnace, lights, water pump etc all running as needed (not heavy conservation) and the battery "gauge" reported at 2/3 by the end of the trip.

I need to find a gauge that actually monitors consumption of Amps as opposed to just battery voltage to get a more accurate indication. Then on to the inverter and solar panel project...
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Old 04-21-2014, 05:31 PM   #8
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Originally Posted by msturtz View Post
You may wish to keep in mind that the absorption charge voltage is 7.75 VDC per battery which equals 15.5 VDC.
Edqualization mode is 15.5VDC not Absorption mode which is 14.8VDC

(Flooded Batteries)
Equalization Mode =
- 6VDC battery = 7.8 VDC
- 12VDC battery = 15.5 VDC

Absorption Mode =
- 6VDC battery = 7.4 VDC
- 12VDC battery = 14.8 VDC

Float Mode =
- 6VDC battery = 6.6 VDC
- 12VDC battery = 13.2 VDC
(+- .01VDC)

Most RV charge controllers are not sophisticated enough to do a true Equalization (15.5VDC)and only Equalize around 14.6 to 14.8VDC, as they have no way of monitoring the battery's temperature. At 15.5VDC, the battery will begin to boil and possibly do a worse things if the is not monitored (temperature).

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250Watt Grape Solar Panel, MorningStar MPPT 60 Charge Controller
1500 Watt Ramsond PSI, 2 Trojan T145 Batteries (260Ah)
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Old 04-23-2014, 09:53 AM   #9
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2-6's Great now a couple of solar panels on the roof and you will be GOLDEN.
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
140 days boondocking in 2016
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Old 04-23-2014, 05:26 PM   #10
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I'll say it again. Better to use two 12v batteries in parallel than two 6v batteries in series. That way the batteries are not undercharged and if one fails it can be disconnected and one still would have a good 12v battery to continue functioning.

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