how many watts from this battery?

Discussion in 'General Electronics Chat' started by rispodium, Mar 18, 2014.

  1. rispodium

    Thread Starter New Member

    Mar 5, 2014
    8
    0
    I am thinking of buying a 24v 10aH battery.

    if P= V*A THEN the power is 240 watts right?

    because it says 10aH does this mean it can give 240 watts for
    10 hours?

    can it give 120 watts for 20 hours?

    help appreciated
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,418
    3,355
    10Ah means that the capacity is 1A for 10 hours.
    At 24V, that is 24W for 10 hours or 12W for 20 hours.
     
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,669
    804
    Then the energy stored is 10*24*3600 Joule = 864kJ. None of these number say anything about power, only how much total energy you can get out of it.
     
  4. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    Power is NOT energy.

    Energy is NOT power.

    Back to basics...
     
  5. Ramussons

    Active Member

    May 3, 2013
    557
    92
    No, it's 240 Watt Hours. Theortically, 240 Watts for 1 Hour or 1 Watt for 240 Hours. Since batteries are Normally Discharged / Charged at a 10 Hour rate, we can presume that it is 24 Watts for 10 Hours, actually less than that considering an Efficiency factor.

    Ramesh
     
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