We are going to have 2-6 volt golf cart batteries and a storage box for both seems to be very expensive.

I have been browsing ideas for this and found a few cases where folks have purchased or made cases that hold the 2 batteries, cutoff switch, battery charger and some limited extra storage in a vented case behind the propane tank.

I already have a weather proof box that is 20" deep, 18" high and about 36" wide with a lockable lid.

My question that I have not been able to find an answer to is how much room I actually have between the propane tank cover and the front wall of the 179 measured 18" from the top of the tongue frame.

Is anyone able to take a quick measure and see whether there is close to enough space?

Thanks

You might be able to get it on the frame rail adjacent to the gas tank, would need to tie it down or stabilize it somehow.  

Really getting anxious already and 5 months to go before we get it to play with.

Marwayne and I have both built large storage units on our Pods and that may be worth your looking at.

Cheers, 

ilthyn

And lead acid batteries is all about how many cells are in use. A 6-volt battery has 3 cells. Two of them gives you 6 cells or approximately 12 volts.

A single 12-volt battery already has 6 cells, so it's 12 volts. If you are going to up the capacity, you need to run them in parallel.

A simple way to compare batteries is to calculate how many watt-hours one holds. Just multiply the amp-hour rating by the voltage, and you get watt-hours.

So a 6-volt battery rated at 200 amp-hours actually holds 1200 watt-hours of energy. It would be roughly equivalent to a 12-volt battery rated at 100 amp-hours.

I am sure you have some good points. There is a lot of information about this subject which NAP1947 should study before deciding his course of action. I still stand by my comment that 2 - 6 volt batteries in series must be of equal capability ( same age) because if one declines, there is no more 12 volts available and you would probably have to replace the faulty one with two batteries. There is no real need to hook two 12 batteries together in parallel if a battery switch is utilized. If the battery is not a deep cycle one, it should not be run down regularly below 50% (according to some sources). Also, with them in parallel and they have been severely depleted, the initial charge amperage starting the vehicle may blow the alternator protection on the line to the batteries. The result of this would be no battery power at destination since there would be no indication that this had happened. (I have had this occur.) I also do not know what the cost effectiveness is here.  

Their reason was that those 2 units will operate our CPAPs longer than 2-12 volt batteries with less chance of dropping the batteries below 50% capacity, the units are voltage and current sensitive.

I am no electrical engineer but figure these folks know what they are talking about as they have to support their units.

Still appreciate the discussion, suggestions and all.

Would appreciate an update as you utilize this system.

Bon chance!