?? 6 or 12 VOLT BATTERY ??

HVFDFIREFIGHTER wrote:
So if I go with two 6 volt batteries say 35 amp hour each. I wire them in series, I get 12 volt at 35 amp. In Parallel, it would be 6 volt at 70 amp?

Can I charge two 6 volt batteries connected in series on a 12 volt charger?

Is a multi stage charger needed for deep wet cell?

If a battery is listed as 725 cold cranking amps, is that about the same as 55 amp hour? Some come right out and say amp hour, others (even though they are deep cell) still only have cca on them

New to this. I want to do it right. Should I go with marine type batteries? AGM? or SLA? They will be placed in a crawl space with air flow.

Battery capacity is usually rated at a 20 hour rate. A typical 6V golf cart battery will have 210-250 Amp hour rating. You don't wire them in parallel unless you have four. You need the 12V series wiring so they will deliver 12V to your rig. When wiring in series voltage adds but amps remain the same.

Yes, a 12V charger will charge two 6V's in series, that is the way most folks do it.

Yes, a multi-stage charger is always better than a fixed output charger, for most. That way, if you forget about the charger running or wish to use a float charge, the charger performs as to your use. A good onboard converter will have these attributes.

Any battery listing CCA or CC is not a true deep cycle but a starting battery or a hybrid. They can be used but are not as good as a true deep cycle.

AGM batteries require little to no maintenance and can be located in almost any position. They have faster discharge and charging capabilities. Flooded Lead Acid batteries require the addition of water occasionally and can only be positioned with the vent caps on top. AGM batteries are more expensive.

GC2 6V batteries are the most bang for the buck and the most durable for the RV'er that camps off the grid. If a user only camps at full hookup campgrounds, any battery will serve the purpose since you will only need the battery to power the emergency brake system in case of a trailer disconnection.

Good info here at Battery University.

Two golf cart 6V batteries in series is what I use, about $85 each from Costco. They have something like 220Ah of capacity, so in series I have 12V of 220Ah. I use they hold a charge all summer because I disconnect them between trips. I keep them wires in series in the winter and use a 12V Battery Tender for them.

What do you want to power with an inverter?

Welcome!
If you go with the two 6 volters, the batteries most used are golf cart lead acid batteries. You can get them at Costco or Sam's Club for around $80 each.
You should add your rig to your profile. This would let posters know what kind of rig. Most rigs have a converter that has a charger built in. The size and quality of chargers vary. You may want to look at your converter in your rig and post make and model.
The Schumacher chargers vary. Some are good multi-stage chargers and work very well.

Is this a good charger: Schumacher SC-1200A/CA SpeedCharge 3/6/12 Amp Charger/Maintainer/Tester

or how about this one: Schumacher SSC-1500A-CA Ship 'N' Shore 15 Amp SpeedCharge Charger with Battery Clamps

So if I go with two 6 volt batteries say 35 amp hour each. I wire them in series, I get 12 volt at 35 amp. In Parallel, it would be 6 volt at 70 amp?

Can I charge two 6 volt batteries connected in series on a 12 volt charger?

Is a multi stage charger needed for deep wet cell?

If a battery is listed as 725 cold cranking amps, is that about the same as 55 amp hour? Some come right out and say amp hour, others (even though they are deep cell) still only have cca on them

New to this. I want to do it right. Should I go with marine type batteries? AGM? or SLA? They will be placed in a crawl space with air flow.

If starting new or replacing old batteries, I would go with a pair of 6 volts over a pair of 12 volts. 6 volts will apparently give you a little more amp hours if that matters to you. But the bigger benefit to me would be that they are more tolerant on heavy lods and dropping down and being able to be recharged. 12 volt batteries need to be babied more, especially depending on usage.

Welcome to the forum.
Battery capacity depends on how much dry camping you do and what you want to power with the inverter. For dry or boondocker camping dual 6-volt golf cart batteries are a common setup.

Two 6V batteries wired in series are essentially one 12V battery. There really isn't any "better" about it other than 6V batteries are usually always deep cycle batteries and may offer more durability than the more common hybrid Marine deep cycle/starting batteries.