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Old 12-21-2019, 04:45 PM   #1
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Model: Chateau 31W
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THOR #17621
E-450 31W Add Batteries

Have a 2015 Chateau 31W. Going to Alaska and probably do some boon docking. Since this unit has a home frig I would like to add extra batteries so I can go longer between charging....etc. I have read that it can handle 4 batteries....how can this be done??????
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Old 12-21-2019, 04:47 PM   #2
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With enough money and motivation anything can be done. Adding extra batteries to your coach falls on the easy end of that scale.
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Old 12-21-2019, 04:59 PM   #3
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Ok...how was the quesI think
tion....got the money...
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Old 12-22-2019, 04:22 AM   #4
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So Iím guessing that you are asking about where to mount?
Many on this site have mounted 2 additional batteries in one of the outside storage compartments near the two OEM house batteries.
You will need to mount near so that you can connect all 4 batteries with proper cabling.
As long as they are mounted correctly and securely, and the cables are properly connected...you are golden.

The other question that must be answered...
- are they 6 volt or 12 volt
- are they connected in series or parallel

If you donít know the answers to these questions, you should probably pay an expert to assist you.

Finally...it is always best to start with 4 new/like brand batteries when you decide to attack this mod. That way they will all charge and dis-charge equally.
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Old 12-22-2019, 09:21 AM   #5
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Thanks...I'll do further investigations. I had planned to do all new gell cells. There is an empty storage directly beside the steps.
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Old 12-22-2019, 01:51 PM   #6
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My only concern would be the weight of the additional batteries and how they will affect your GVWR and GAWR.
The GVWR for your 31W is 14500 lbs which is the same as my Freedom Elite 32FE. While our floor plans are different, my unit, when fully loaded for a trip, is within 200 lbs of the rear axel GAWR.
My question to you is, have you weighed your coach so you know what your weight limits are?
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Old 12-22-2019, 03:23 PM   #7
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Quote:
Originally Posted by kk4lb@hotmail.com View Post
Have a 2015 Chateau 31W. Going to Alaska and probably do some boon docking. Since this unit has a home frig I would like to add extra batteries so I can go longer between charging....etc. I have read that it can handle 4 batteries....how can this be done??????
I have a 31L and will do the same thing when springs breaks in a few months. I have the two-way fridge and just need more longevity between charges.

There 'appears' to be enough room under the step, behind the existing house batteries. There is one obstacle (at least for me). There's, what I'll call, a junction block mounted on the left inside of the storage frame. I say frame because it all exposed to the elements. The word 'box' doesn't apply. There are no 'sides' per se.

Crawl under the coach and check the storage frame. Look for signs of stress failures (e.g. cracked frame members, broken welds, etc) to make sure you have what it takes to support the weight. I'm considering moving that junction block to the outside and doing something more to protect the batteries against the elements. The frame is wide open to whatever occurs under the coach - driving or sitting.
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Old 12-28-2019, 06:15 PM   #8
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Quote:
Originally Posted by kk4lb@hotmail.com View Post
Have a 2015 Chateau 31W. Going to Alaska and probably do some boon docking. Since this unit has a home frig I would like to add extra batteries so I can go longer between charging....etc. I have read that it can handle 4 batteries....how can this be done??????
I’ve done the Alaska road trip twice in the last five years. And plan to go again in June. Battery capacity not a concern.

You’d do fine with two high quality new batteries. Alaska requires a lot of driving. It will keep your batteries charged.

You might do better with 100-200 watts of solar if not convinced. Likely plenty of daylight when you’ll go. Amount of clouds and rain depends on your route but I understand solar works fine with clouds.

Not sure how much power a residential fridge demands but it will be fine. If necessary you can run gen a couple of hours and it will stay fine for eight hours of more if you leave the door shut. Need to leave it off eight hours with propane if you take the ferry. Alaska temperatures are cool.
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Old 12-28-2019, 08:01 PM   #9
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Boondocking

kk4lb, There is a web site that will probably be worth your while, and other travellers too. Its called Boondockers Welcome. Once you join up you can boondock in the U.S. Canada, Mexico and Europe on a members property for free. A lot of people supply electricity, water, wifi, and other amenities. Its worth a look at least. We joined this year and one stay pays for itself if you were planning to stay an a campground.
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Old 12-28-2019, 08:10 PM   #10
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I managed to modify & fit 4- 6 volt deep cycle interstate batteries under the steps of my ws31 (same as the 31w) The battery tray is big enough the fit four, it's the height that is too much. They are 11" tall compared to some agm's at 9.65". Try to find a 6 volt AGM, they are closer to a 12 v in height.
INTERSTATE SITE- https://www.interstatebatteries.com/...ies/deep-cycle

https://www.apexbattery.com/apex-apx...m-battery.html
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Old 12-28-2019, 11:26 PM   #11
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IF u have deep pockets. would also look at going to lithium battery's.
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Old 12-29-2019, 12:52 AM   #12
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Quote:
Originally Posted by Mag View Post
kk4lb, There is a web site that will probably be worth your while, and other travellers too. Its called Boondockers Welcome. Once you join up you can boondock in the U.S. Canada, Mexico and Europe on a members property for free. A lot of people supply electricity, water, wifi, and other amenities. Its worth a look at least. We joined this year and one stay pays for itself if you were planning to stay an a campground.
The web site is boondockerswelcom.com. I joined a few months back. Iíve hosted five so far and used four. All have worked out marvelously. Most ( like me) provide electricity. Not all. The web site tells you amenities.

Iíll look into using it on my trip to AK in June. The owners are Canadian, but there are already many US sites.
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Old 12-29-2019, 12:53 AM   #13
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Gel Cell batteries are expensive, they also require a different charger, do your research before you buy, I put 4 group 29 gel cells in my AXIS 25.4, I bought a 2000 watt inverter/charger, it has different settings for all the different batteries for the charge cycle, I did price the Lithium once, $1,500.00 for one battery,
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Old 01-18-2020, 05:42 AM   #14
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31w battery box

i added 1 12v battery to the box works good desert boondocking is done with a 2200 gen in my trailer at night to recharge batteries and keep the frig up
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Old 01-18-2020, 06:42 AM   #15
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Battery longevity

Not to hijack the thread here, but approximately how long can you dry camp on the batteries with a residential fridge before needing to charge? Question is based on having a pair of standard 12 volt wet cells that normally come as original equipment. Been mulling over a different coach with the 120 volt fridge but we do a lot of National Forest Campgrounds and I have been leary of fridge run time on batts.
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