Marine/RV Battery

Esacnj wrote:
using in 5th wheel. originally had 2-12V interstate. one failed in 1 yr. 2nd been good for 4 yrs. usually always camp with hookups. only used for operating jacks/stabilizers. 2nd one now getting weak. should I go back to 2-12V ?

then buy the cheapest walmart u can

using in 5th wheel. originally had 2-12V interstate. one failed in 1 yr. 2nd been good for 4 yrs. usually always camp with hookups. only used for operating jacks/stabilizers. 2nd one now getting weak. should I go back to 2-12V ?

Mechanics always swear by Interstate batteries,

Yep. The interstate battery truck pulls up to their shop and replaces the missing battery in their inventory, collects for the battery and zooms off.

No telephone call
No waiting
No driving

As far as a shop is concerned, what's not to like?

steveh27 wrote:
I wish I had room for 2 6v gc's. My battery box is 15"x8.25"x9.5" high. I have an ac delco 29mf. May try this one:
https://www.walmart.com/ip/VMAX-XTR31-135-Golf-Cart-Battery-AGM-Group-31-Deep-Cycle-Battery-12V-135Ah/387091324

A 6v golf cart battery has the same footprint as a Group 24 12v battery. It's just a little taller.
That's why you can fit two of them on most trailer's A-frames.

Esacnj wrote:
Which to buy, Costco Interstate or Walmart Everstart?

Walmart may use a variety of suppliers, but I think Johnson Controls makes both of those batteries.

I just picked up 3 deep cycle 12v batterys for ours, one replaced the original one for the rv, and welded up a frame to bolt to the frame rail of the motorhome to hold the other two. I still have to wire in the second two battery as yet thought, this weekends project.. Our local auto parts supply shop had them on special for a $139 each shop price..

I wish I had room for 2 6v gc's. My battery box is 15"x8.25"x9.5" high. I have an ac delco 29mf. May try this one:
https://www.walmart.com/ip/VMAX-XTR31-135-Golf-Cart-Battery-AGM-Group-31-Deep-Cycle-Battery-12V-135Ah/387091324

Esacnj wrote:
Which to buy, Costco Interstate or Walmart Everstart?

if you always camp with electric hookups, any cheap dual purpose marine battery will work. the Costco Interstate is good.
BUT if you plan on dry camping or boondocking, go to a dual 6v GC2 golf cart battery setup.
Costco and Sam's Club has them.

I second getting two 6 volt instead of two 12, but are you wanting one or two? if one then you need one 12 and not one 6 of course.
Mechanics always swear by Interstate batteries, so for a 12v is probably the longer-lasting choice. The real difference being how many years they will last.
Are you boondocking or just needing to make it from campground to campground?
How long does your camp trips last? How long in between trips, how many per year etc???
For light, minimal, campground use then go for cheapest battery you can find as it will die from lack of use before you can wear it out.
If a serious full-timer then you would want to look into more serious batteries than the big box stores will have.
For moderate camping and boondocking then two 6 volt batteries from any store will be fine. Probably need to get from auto parts store. I know Advanced was the only ones who had them in stock when I bought mine.

Costco or Sam's are good. but if these are for trailer or house not for starting a motor consider switching to GC=2 or GC-12 golf car batteries

-GC2+-GC2+ = 12 volts
-GC12+ = 12 volts.

That is how you wire them.