?? 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.