Power usage calculation

Discussion in 'Power cuts' started by rakabos, 8 Mar 2012.

  1. rakabos

    rakabos

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    Hi guys

    How do I calculate how long my UPS will run if i have a return pump connected to it. The pump is 50W i think. This is the specs from the UPS:

    Input power:24 Volt DC
    Output power:1200 Watt / 2000VA 220 Volt AC
    2x 102ah batteries

    Thx
     
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  3. belindamotion

    belindamotion Google Master

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    Last edited: 8 Mar 2012
  4. rakabos

    rakabos Thread Starter

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  5. Toolboysa

    Toolboysa Moderator

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    Unplug power and use a timer :lol::lol::lol:
     
  6. mariusmeyer

    mariusmeyer

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    Your pump is 50W and to get to the amps that it will draw you can divide the wattage by the new supply voltage which is 24V.
    That gives you 2.08Amps. You have 102AH capacity since the batteries are in series (to get the 24V) and that will effectively give you 49hours of backup.
     
  7. rakabos

    rakabos Thread Starter

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    cool thx. We have had no power since 10pm last night. Still out as i type this
     
  8. Toolboysa

    Toolboysa Moderator

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    Just shout if you need to charge batteries
     
  9. rakabos

    rakabos Thread Starter

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  10. lIghty

    lIghty

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    What is the efficiency of the inverter?

    What type of batteries are they? Deep cycle?
     
  11. Quintus

    Quintus the irish aXeman

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    Deep cycle batteries can handle a total discarge not many, without damage but most inverters should auto cut out to protect the battery at 11.6V it also mean the the battery release a steady amount of amperage at at time, unlike a STD car Battery the as you nead it will use all the amperage within minutes. eg.
    Deltec and Delco 102AH upwards
     
  12. mariusmeyer

    mariusmeyer

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    My inverter cuts out at 10.5V.
     
  13. rakabos

    rakabos Thread Starter

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    Yes, deep cycle

    Here are the specs



    [​IMG]
     
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