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MaximusTnC's avatar
MaximusTnC
Explorer
Jun 15, 2014

Questions: 2nd battery for my sweet, sweet minivan?

Hi RV.NET peeps!

I have installation/configuration questions that I'm hoping you'll be able to help me with, and/or point me in the direction of a person/company that could help me out.

I wish to add an excellent AGM battery to my 2006 Chrysler Town & Country minivan as a SECOND battery for all of my electronics stuff.

Nothing crazy: laptops, tablets, cell phones, battery chargers (camera/flashlight/etc). We go rough camping quite a bit, and don't want to keep thrashing my main car battery, prevent getting stranded, etc. - so, I'm researching the best route.

The battery will be inside the van (hence an AGM battery), in the van's Stow-n-Go seat-well (I removed the middle-row seats, and now have wells that are pretty deep & spacious) - here's a couple of example pictures of this space. I don't have exact measurements, but I'm pretty sure a battery will fit.



Additionally, I know I should to put the battery into a nice battery-enclosure, and secure it to the floor for safety.

Beyond the battery & enclosure, I'd ideally want to have the battery get charged by the van when it's running, so I'll need to have this wiring done, plus I'll need to purchase a battery charging / controller system that's compatible with the battery requirements.

Lastly, I'll need to purchase a power inverter to wire-up to this new battery, and then secure it to a convenient location - likely on the existing console between the driver/passenger seats.

So, basically, I think I'll need to buy the following for this fun project:

(1) AGM battery
(1) Battery enclosure
(1) Battery charger / controller
(1) Power Inverter w/ AC & USB outlets
(1) misc cabling / connectors / etc...

I'm sorry to have written such a long question, but I'm not to sure whom I should talk to about this project - I'm not an expert, but I know you guys are, so that's why I'm here buggin you. I'm planning on spending the right amount of money for this project, and will need to locate a professional (freelance or in a shop) to do the work. I know when I should defer to an expert for something, and this is one of those times. I don't want to do it wrong and royally screw up my van.

Again, thanks for your consideration in helping me out here, and I hope that I can get most everything answered I need for this project from you folks. :) Chat soon! -MAXIMUS (Las Vegas, NV USA)

PS - I'm a computer expert (PC), so if any of you have questions, I can probably help you out. Networking, Windows, etc...
  • Or. A small, portable generator like this.
    Honda1000

    Use it to run all your "stuff", coffee pot, fan on hot days, plus charge the car battery as needed. You can run a small inverter off the car battery then recharge the battery from the generator if you have to.

    We have a small cargo carrier we use to carry the generator, gas can, lawn chairs, BBQ grill, etc.


    Like your battery idea. It's nice and quiet but the generator gives a lot more flexibility.

    Replacing your standard starting battery with a deep cycle marine battery might be worth some thought. They have a much higher amp hour capacity than your basic staring battery.
  • You'll need an isolator, which allows you to use the AGM battery and not draw down the van starting battery. Also something to secure the battery to the floor so it doesn't go flying around on rough roads or in an accident.

    The rest of your list looks pretty good, except that I am not sure about those wells being anywhere deep enough. My AGM batteries are pretty tall.

    The experts who will chime in soon will give you a LOT more advice, probably better than mine. Good luck with your project.
  • Hi,

    Try this place. http://www.batteriesplus.com/

    You might be better off buying a 1800 watt UPS system, on sale, and then take out the battery from it. Normally they run on 12 VDC, and would work. The problem is that most batteries are 9" to 12" tall, and it does not look like you have that much space. A pair of 25 AH emergency light batteries, or other small batteries might be your best thing.

    You really don't need a battery charger, just a 30 amp fog light relay under the hood that is energized at all times when the ACC position is on, or the radio is getting power, then it will turn on. Connect one side to either the alternator output (for higher voltage) or the battery +12 terminal (about 0.8 volts less) then go to a 20 amp fuse, then to the new batteries. They will run from the alternator while the engine is on, and battery when the engine is off.

    Then install a couple of cigarette lighter receptacles to plug in whatever. You can wire the inverter directly to the battery too - use a 20 -30 amp fuse.

    This battery is only about 7" tall. http://www.trojanbattery.com/product/12-agm/

    Fred.