Maximising battery time

Discussion in 'Power cuts' started by mariusmeyer, 12 Sep 2010.

  1. mariusmeyer

    mariusmeyer

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    I've been thinking since I hooked my return up to the inverter. Would it be ok to run the return for 30mins and then off for 30mins. The return is about 3000LPH after headloss and total volume is 600L. Very low bioload, only a few corals.

    With this on-off routine you can effectively double the backup time. And 3000LPH for 30mins means a total turnover of 2.5X during on time. If we could leave it on for shorter or off for longer then you get even more time out of the battery.

    Any thoughts on this?
     
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  3. chikaboo

    chikaboo

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    Great thinking .... but I'm sure our biggest concerns are when there's a power failure and there's no one around .... now who's going to put the inverter of and on ...... If you around great solution to extending the "run" time of the pump but remember when there's no one to do it ... then?????
     
  4. mariusmeyer

    mariusmeyer Thread Starter

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    I have a delay timer relay that has the function to switch on and off on a set interval so I dont have to be around to do it.
     
    Last edited: 12 Sep 2010
  5. vatso

    vatso

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    without pics its not true :lol:
     
  6. mariusmeyer

    mariusmeyer Thread Starter

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  7. vatso

    vatso

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    So it's not auto timing if there is power loss? rather manual if you around or am I missing to trick here?
     
  8. mariusmeyer

    mariusmeyer Thread Starter

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    Hook this one up between the inverter and the return pump. It gets its power from the inverter (very little) once it kicks in. So it will cut the power from the inverter to the return pump at the preset time and then back on again. NO manual work involved.
     
    Last edited: 12 Sep 2010
  9. vatso

    vatso

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    Try again?

    how does it know when to start the timer? & when the inverter is working in battery mode

    that means it needs to take in to power inputs not sure I saw that
     
  10. mariusmeyer

    mariusmeyer Thread Starter

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    It starts the timer when the relay energizes. Thanks to Dallas, we separated my inverter feed from the AC feed. So my inverter only starts up when the power fails. While there is mains available the pump gets its power from the mains. When the power goes, a relay switches to the battery/inverter feed. This way there is no permanent drain on the battery. It does have 2 inputs for power (pins 2 and 10).
     
    Last edited: 12 Sep 2010
  11. LuckyFish

    LuckyFish MASA Contributor

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    All pumps, from 3 different systems are running via my inverter. In between inverter and the pumps, there is a relay. As long as Eskom supplies power the pumps are running 24/7. As soon as the power cuts off, the relay switches the live towards the return pumps via a digital timer. From there I can program the
    on and off time. 10 minutes on 20 minutes off.
    Works perfect and tripples the back up time.
     
  12. vatso

    vatso

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    How good is it to switch AC pumps on & off all the time?

    the idea is a good one for making the battery last longer just not sure re the return pump

    also the "Switching" idea is easy & affective now you mention it
     
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