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Thread: Desulfator question

  1. #1

    Default Desulfator question

    I saw a desulfator at a local 'tronics' shop, and the cashier/manager/owner stated it didn't matter what the AH capacity of an effected battery was, it would just have to be connected longer.

    Does a desulfator have any limitation as to the AH of the battery it's connected to?

  2. #2
    Join Date
    Jun 2003
    Location
    pittsburgh, pa
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    10,282

    Default Re: Desulfator question

    first of all i have the opinion that these devices are unproven to work, but what the guy said to you doesn't make any sense to me for aren't they supposed to be connected all of the time anyway? in other words, how do you increase the time connected to an item that is always connected?
    NIEL

  3. #3

    Default Re: Desulfator question

    The only solid evidence of desulphator action we've seen around here is that they screw up certain MPPT charge controllers. Notably my favourite Outbacks.

    The theory is that the pulsed frequency dislodges the sulphur from the plates. There is some evidence that PWM charge controllers do have a positive effect in this manner. In that respect one would expect that the size of the battery bank would matter.

    Proving whether or not desulpators work is practically impossible, as no two batteries are exactly alike. As far as preventing sulphation, proper charge technique works. As for reversing sulphation ... Good luck with that no matter how you try it. By then the battery has internal damage any way.

    Save your money.
    1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.

    Ohm's Law: Amps = Volts / Ohms
    Power Formula: Watts = Volts * Amps

  4. #4
    Join Date
    Oct 2003
    Location
    Paradise, CA
    Posts
    369

    Default Re: Desulfator question

    I'd give you a killer deal on two DeSulfator 1000 models. As mentioned above, I finally learned that the erratic behavior of two Outback controllers ceased as soon as they were disconnected.

    I have three Outback controllers and one Xantrex C-60. The behavior in question was only on the two Outbacks that actually functioned in MPPT (bigger volts in than out). The C-60 and one Outback that I have connected to a "12V" array didn't seem to care whether they were desulfating or not.

    Phil
    Happily off-grid since 1977

  5. #5
    Join Date
    Oct 2010
    Location
    Nova Scotia canada
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    2,740

    Default Re: Desulfator question

    Quote Originally Posted by Cariboocoot View Post
    Save your money.
    Agree totally. Basically electronic Snake Oil.
    No proof whatsoever that they do anything beyond thinning your wallet.
    First cousin to the ultrasonic "deer whistles" sold to stick on your vehicle, that so many people "believe in".
    #1: Do they actually make any sound at all? No humans have heard the claimed sound.
    #2: Deer have basically the same hearing frequency range as we humans. Dogs can hear somewhat higher, but mice hear really high frequencies, so if these whistles make any sound at all, perhaps they might even attract mice instead of scaring them away?
    And that's a lesson in how politicians turn one question into a totally different answer.
    1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
    Domestic hot water totally provided by the sun 8 months out of every year via thermal panel.

  6. #6
    Join Date
    Dec 2010
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    I can see Mexico from my back yard
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    Default Re: Desulfator question

    Quote Originally Posted by bmet View Post
    I saw a desulfator at a local 'tronics' shop, and the cashier/manager/owner stated it didn't matter what the AH capacity of an effected battery was, it would just have to be connected longer.

    Does a desulfator have any limitation as to the AH of the battery it's connected to?

    Every controlled study I've seen indicates that their effectiveness in reducing wallet weight is completely independent of battery capacity.

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