2 -6 volts or 4?

I did mention we do have a generator. We may well park a week or as long as our water lasts out in the sand. I’ll put in all 4.

Significant boondocking much better with more capacity.

ivbinconned wrote:
What would determine your decision?

Whether I have an inverter and the loads I expect to place on it.

I would fill the available battery space if going off-grid. 4x

My decision would be based on how I feel about running the generator. Dual 6's will get me through a night, but I'll probably need the generator the next day if it's real cold. With twice the capacity i could go two nights.

In the desert with no neighbors? run the genny. In a campground? I'd rather have the extra capacity.

I might be more than happy to offer an opinion, but you have left out a lot of vital information as wizard pointed out.

Please fill us in a little and you might get more valuable responses.

Our RV has never had more than a pair of golf cart batteries and we have never been short of power for a single overnight.

Matt

How much boondocking do you do ? Just over night ? Two nights ? Longer ? What options do you have if any for recharging your batteries ?

What kind of loads do you run while boondocking ?

If it is just overnight and you are not running anything more than a TV for a couple of hours, two 6V golf cart are adequate assuming you have a way of charging them BEFORE another boondock night !