Adding two 6v to two 12v?

Thanks for the support BD.

By the way there is a slight difference between most 12 volt (MARINE/deep cycle) and most 6V (Golf Car/DEEP CYCLE) batteries. the way I type it suggests.

MARINE/deep cycle you can safely use about 25% of the capacity. run 'em down to say 25% SOC and the odds of recovery are... SLim (not none but clearly slim)

DEEP CYCLE you can safely use 50%. Run 'em down to 25% SOC and odds are good they Will Recover (not 100% but way better than the MARINE type).

By the way I run both types in parallel here one pair of GC-2's (DEKA G-20s) and 3 Group 27 MARINE/deep cycle so I know what I'm typing about.

judelaurenzo25g wrote:

theoldwizard1 wrote:

edbehnke wrote:
remeber batteries always go to the weakest battery. heck, just replace them all.

Concur !

Limp along on what you have until you have the funds to do them all.

It's not about funds. I just don't want to wast 2 new 12v batteries.

And you don't need to. In real life those two twelves will work just fine.

Hi,

Make sure to brace the floor on the compartment. An rv going down the road dragging the house battery bank on the pavement would not be a pretty sight.

judelaurenzo25g wrote:
6's will fit, I am moving my battery bank to the empty storage compartment next to my stairs (where they are located now). I could probably fit 10 batteries in that compartment if I wanted too, but weight would be a problem. I will add a few vents to the compartment to let gasses out.

Since the 12s are new, you can get new 6s or new 12s to go with them.

If you choose 6s, the way I bank them is as two big 12s instead of as three 12s. That is, first put the two 12s in parallel then parallel that pair with the two 6s (in series) Now put your load/ charging wires on so that the pos go on one pair and the neg on the other pair.

You can parallel different AH size batteries with no issues at all. What counts is if they are in different conditions as with an old worn battery and a new one.

If you don't find it convenient to bank them all for loading and charging, you can have more battery by using a separate bank for your inverter and another bank to run the rest of the rig.

That way you can have two banks in different conditions and they won't be in parallel. You just need a way to charge each bank, which is not rocket science to arrange.

theoldwizard1 wrote:

edbehnke wrote:
remeber batteries always go to the weakest battery. heck, just replace them all.

Concur !

Limp along on what you have until you have the funds to do them all.

It's not about funds. I just don't want to wast 2 new 12v batteries.

wa8yxm wrote:
I would never get rid of perfectly good 12 volt batteries.

But I want you to think of this... And I will explain it
There are no SIX VOLT batteries in RVs.. (Even if I can clearly see two of them under my steps).

WHY
Well

If you have a 12 volt battery you have

-{12 volt battery}+ 12 volts

And if you have 6 volt pairs you have
-{6v}+-{6v}+ 12 volts

As you can see the two six volt in SERIES become.. a 12 volt battery.

Think of them that way
Can I put a 12 volt battery in parallel with 2 more 12 volt batteries? YES
Can I replace 1/2 of a 12 volt battery and not the other half (NO)
Must both halves be the same (Age/Make/Model/Size) yes

But see how easy the questions get when you think of your pair of 6vs as a single 12?

And there is your 12v lesson for the day. Stay tuned for another lesson tomorrow. :B

wa8yxm wrote:
I would never get rid of perfectly good 12 volt batteries.

But I want you to think of this... And I will explain it
There are no SIX VOLT batteries in RVs.. (Even if I can clearly see two of them under my steps).

WHY
Well

If you have a 12 volt battery you have

-{12 volt battery}+ 12 volts

And if you have 6 volt pairs you have
-{6v}+-{6v}+ 12 volts

As you can see the two six volt in SERIES become.. a 12 volt battery.

Think of them that way
Can I put a 12 volt battery in parallel with 2 more 12 volt batteries? YES
Can I replace 1/2 of a 12 volt battery and not the other half (NO)
Must both halves be the same (Age/Make/Model/Size) yes

But see how easy the questions get when you think of your pair of 6vs as a single 12?

So from what I read here. I'm better off getting two 12v same size and capacity because the 2-6v won't match up in size. Correct?

I would never get rid of perfectly good 12 volt batteries.

But I want you to think of this... And I will explain it
There are no SIX VOLT batteries in RVs.. (Even if I can clearly see two of them under my steps).

WHY
Well

If you have a 12 volt battery you have

-{12 volt battery}+ 12 volts

And if you have 6 volt pairs you have
-{6v}+-{6v}+ 12 volts

As you can see the two six volt in SERIES become.. a 12 volt battery.

Think of them that way
Can I put a 12 volt battery in parallel with 2 more 12 volt batteries? YES
Can I replace 1/2 of a 12 volt battery and not the other half (NO)
Must both halves be the same (Age/Make/Model/Size) yes

But see how easy the questions get when you think of your pair of 6vs as a single 12?

edbehnke wrote:
remeber batteries always go to the weakest battery. heck, just replace them all.

Concur !

Limp along on what you have until you have the funds to do them all.

edbehnke wrote:
remeber batteries always go to the weakest battery. heck, just replace them all.

the 2 - 12's are new. It would be a waste.