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Old 04-19-2015, 07:10 AM   #11
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Originally Posted by reitrof View Post
Yes I remember reading that. I don't the ability to fab one, do you have the specs for the tray?

I'm also thinking of modijying the existing tray to hold 2 or replace it with a new sliding tray.
I do not have the secs for the tray. I purchased a plastic battery tray off ebay and had the metal frame built to size. Our unit is in storage but, I can measure it one day next week if you like.

I had no idea you could replace the the existing tray with one that holds two batteries. Seems like a good option.
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Old 11-29-2016, 05:43 PM   #12
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I did a mod on my 2004 31SS that I saw on another site. The person spent about 1200 dollars total. I was able get the frame made for 150 and bought the sliding tray that will hold up to 250LBS for $150. Bought a new access door on ebay for $85. Luckily I am real handy and was able to complete most of the work myself. Going to install additional batteries and larger inverter when other projects are finished. Original battery tray would only hold 1 battery.
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Old 11-29-2016, 08:42 PM   #13
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Adding a battery has been the best improvement we have made.
We have a 2016 31D/S Greyhawk and we used the empty compartment
just in front of the Battery box.
Simply put battery in empty storage box, used a hole saw and ran 2 cables to
new battery.
I did add some reinforcements along flange and put straps under box .
I may add a third battery in area behind left rear wheel .
This unit has 1000 watt inverter but needs heavy cables added to take advantage of the full power.
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Old 11-29-2016, 09:29 PM   #14
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My previous 5er was a sierra. From the dealer it came with the basic Interstate rv/marine battery. As far as power, it didn't last very long before it would die. I did the same thing as a previous post, went to Sam's Club and got a Duracell AGM battery in a 31 series. It's about 1/3 bigger in size and packs 2x more power or more. When I traded in the piece of junk and bought my Northpoint, I took the battery with me and put it in. Nice thing with AGM batteries is you don't need a sealed and vented battery box and didn't need a tray either. Should make one though. Mine has a nice shelf for the battery to sit in and a strap to hold it in. The shelf is large enough I could put another one in there, but we don't do any boondocking like some of you folks do. Yes, it was like $180 but considering the cost of 2 of the Interstate batteries, I think it was a wash.
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Old 12-03-2016, 08:37 PM   #15
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Hey Katiedog! We have the same unit you do and I was wondering about adding a battery as well. Could you post some pics or pic of the reinforcement you did and the straps too? Also did you add another 12 volt or did you replace house batteries with 2 6volt batteries. I did that with my fiver that I had but those 6 volt batteries are very heavy and for me I think I would do all right by hooking 2 12 volt batteries and using the gen set for power if needed and I don't do enough dry camping to warrant the 6 volt battery change over in my mind but that is another story. Anyway could you post some pics or send them to me in a message. Thanks, bill
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Old 12-03-2016, 09:35 PM   #16
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Hey Katiedog! We have the same unit you do and I was wondering about adding a battery as well. Could you post some pics or pic of the reinforcement you did and the straps too? Also did you add another 12 volt or did you replace house batteries with 2 6volt batteries. I did that with my fiver that I had but those 6 volt batteries are very heavy and for me I think I would do all right by hooking 2 12 volt batteries and using the gen set for power if needed and I don't do enough dry camping to warrant the 6 volt battery change over in my mind but that is another story. Anyway could you post some pics or send them to me in a message. Thanks, bill
Hi Folks
I put a AGM group 27 battery in the spare compartment.
I used heavy pipe strap material, and ran it from the frame studs on each side.Just slip it over studs and added a nut to tighten it up.
I also used some light steel brackets normally used in 2x4 wood projects
to add strength to the compartment.
I ran the the 2 cables through 1 inch holes and added 2 more hole on the other side for ventilation.
You will need to come up with a hold down strap fo the battery.
I used a ratchet strap but i could have used some 2x2 wood to hold it in place.
Hope this gives you an idea on how we did the mod.
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Old 01-11-2017, 01:28 PM   #17
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Adding second battery to Greyhawk 31DS

Bought our 2013 Greyhawk used last July. I came with a new Exide group 27 AGM dual purpose battery. On our first long trip, it would not last half the night at a rest stop with only a few lights and the propane heater running. Took the battery in to Camping World last week. They graciously replaced with with an Exide group 27 AGM deep cycle battery at no charge.

But, we are only talking 105 ampere-hours. So I have an appointment with CW this Friday to have them install a second identical battery hooked up in parallel. I will let you know how they recommend installing the second battery. If I were at home with all my tools, I would probably install the second battery myself in the cabinet just forward of the original battery door. But, I would prefer to continue our trip with adequate house power for overnight at least.

In our old travel trailer, we had two Interstate wet cell golf cart batteries. They lasted nine years and we never ran out of power over night or even over a couple of days of dry camping. I was religious about topping off the water and always kept the trailer hooked up to shore power to run the house battery charger.

If my new 12 volt parallel set up does not last, I think I will replace the pair of Exides with a par of AGM golf cart batteries hooked up in series.
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Old 01-12-2017, 10:33 PM   #18
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NW Bob, do let us know what you sort out. We have a 2011 31 DS. When replacing the house battery this summer there just didn't look to be enough headroom to put 6 volt versions in there with out lowering the battery tray.
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Old 01-13-2017, 12:42 PM   #19
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So I have an appointment with CW this Friday to have them install a second identical battery hooked up in parallel. I will let you know how they recommend installing the second battery.
yes! please do!

There's clearly only room for one in the battery slideout in our 2016 31FK. But I'm also surprised you couldn't last the night.

I don't think we've pushed our single Group 27 that hard in the winter, as I try to find shore electric when winter camping. But still, not being able to last a night is disappointing.
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Old 01-29-2017, 09:39 PM   #20
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Added second house battery to Jayco 31DS

Okay. I added a second house battery to our 2013 Jayco 31DS. I had it done at Camping World in Valencia CA. They put the second Exide group 27 AGM deep cycle battery in the small compartment just forward of the battery compartment. They connected the second battery in parallel with #6 wire. I would have preferred maybe #4 or #2 wire. But, they said #6 is what they usually use. So far, so good. I can at least make it through the night with the heater running in 38 degree weather.
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