Surrette Rolls deep cycle batteries

[KFhunter]

I disconnect the battery from the RV and use a battery charger from Walmart.  Since it’s a large battery I use this

[KFhunter]

It’s not hooked up 24/7

I hook it up occasionally and it goes to float

Dunno that’s the best way or not

[CarbonHunter]

Knowing that if you deplete the battery to near zero that you cause the life of the battery to be reduced. Does it make sense to double the amount of batteries to make sure you only deplete your batteries halfway?

[jay.sharkbait]

Knowing that if you deplete the battery to near zero that you cause the life of the battery to be reduced. Does it make sense to double the amount of batteries to make sure you only deplete your batteries halfway?

Actually anything below 50% is bad.

I think the best thing to do is figure out how many amp hours you need and size the batteries accordingly.

IE what do you want to power? Lighting, 12v diesel heater etc. do you plan to invert for TV, microwave?

AGM chart for battery capacity/state of charge.

[Zardoz]

Can anyone recommend a quality smart charger? My small charger is fading fast and I need to replace it. Will a smart charger bring a battery back that's almost dead?

Thanks..

Hi,

Depends on the definition of "... almost dead".

If the battery has been depleted to almost dead, it has been permanently damaged.

As for the smart charger question you may find the OEM charger in the RV to be adequate. My 2013 RV has a built in charger that provides: bulk, absorption, and float charging modes for the battery.

Well, my specific application is that I have a couple of spare (new) 12volt batteries sitting on the shelf that I try to keep charged once a year. I don't have power available where they are stored so I have to bring them up to the house to charge. My charger doesn't seem to get them fully charged according the the gauge and indicator light. So I'm not positive if it's the batteries or the charger. These are small equipment type batteries, but AGM's. Hence my question on chargers.