batteries-deepcycle, or not?

Discussion in 'Shop Talk' started by Countrybumpkin, Jan 9, 2005.

  1. Countrybumpkin

    Countrybumpkin Well-Known Member

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    Gonna hook up an inverter to run the wood furnace blower motors if power goes off-planned on deepcycle, but neighbor down the road swears by using reg. car batteries-says that the inverter kicks off when batteries hit 11 volts, and they are cheaper than d.s.'s...also says that d.s. batteries get a memory-if not used often, then charged if not drawn down, they don't hold charge as long. Any thoughts on this? I'm all about saving any $$ I can, but also want best bang for my buck...
     
  2. aaatraker

    aaatraker Well-Known Member

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    try this link for answers http://www.marine-electronics.net/techarticle/battery_faq/b_faq.htm
     

  3. desdawg

    desdawg Well-Known Member

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    Your car battery is made to provide high cranking amps and be recharged right away by your alternator. It is hard on a car battery for it to be drained way down and then recharged repeatedly. Deep cycle batteries on the other hand were designed to be discharged and recharged. They have thicker plates and will last much longer when subjected to this treatment. That is why deep cycle batteries are used with solar electric systems. They will only be charged in the daytime when the sun is shining. And of course the lights, TV, radio or whatever get used more at night.
    Your car battery will work for a while but you will be replacing it sooner than you would a deep cycle battery. There used to be memory problems with the early cell phone batteries because they didn't get discharged all of the way before recharging but I can't say I've heard of anything like that with deep cycle batteries.
     
  4. BobBoyce

    BobBoyce Well-Known Member

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    NiCad (Nickel Cadmium) batteries are the ones that develop a memory if repeatedly partially discharged/charged. Total discharge and recharge to remove the memory only applies to that type of battery.

    To fully discharge any lead/acid battery, whether a starting battery, or a deep discharge type, will quickly ruin that battery. Sulfation sets in when lead/acid batteries are discharged, and the deeper the discharge, the more rapid the formation of lead sulphate. Also, the plates disintegrate (shedding of plate material) more when the batteries are operated outside of design parameters. This lead "dust" settles to the bottom of the cells and will short out the plates when it gets deep enough.

    The best way to encourage long life from a lead/acid battery is to limit discharge to no more than 20% for a deep cycle (or 10% for a starting battery), and recharge it as soon as possible. This means at least 80% (or 90%) of the charge is left in the battery. Doing so requires a larger battery bank, but you will be repaid by much longer battery life.

    Using a good charger or charge controller is essential to prevent overcharging, which also causes damage.

    Bob
     
  5. rzrubek

    rzrubek Flying Z

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    Go here http://www.fieldlines.com/ and do some looking around. You will find a treasure of information about Deep cycle batteries and how to charge them. It might be wise to get some dc blowers and skip the inverter, or you may want the inverter so you can power other items in an outage as well. A small solar panel could keep the batts toped off. [​IMG]
     
  6. mikell

    mikell Well-Known Member

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    Farther ahead to use golf cart batteries they are made for the abuse that even deep cycle are not.


    mikell
     
  7. mikell

    mikell Well-Known Member

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