Load shedding: My solution

Discussion in 'General Discussions and Advice' started by zak, 23 Apr 2012.

  1. zak

    zak

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    With load shedding on the horizon, coupled with my recent purchase of a NP pellet reactor, I needed to find a decent cost effective solution for an alternate power source.

    I needed a simple system to keep a pellet reactor + 1 flow pump, and an air-stone going for at least 8 hours.. I also required that the system automatically switch-over in event of a power failure.

    I came up with the following:

    [​IMG]

    +

    [​IMG]

    Total cost of the system was under R1500 and it should theoretically provide about 20 hours of backup. The system can also be expanded in future by simply adding more batteries.

    Tested it yesterday, was still running 10 hours later..

    @williet a prospective solution to your power problems..
     
    Last edited by a moderator: 26 Nov 2015
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  3. Nur

    Nur Starz

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    how about the sin wave gedagte? and i think would be nice to know where you purchased from.
    Lastlty PICS or it didn happen.. :)
    thanks..
     
  4. zak

    zak Thread Starter

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    The inverter is modified sine wave but I've got no problem with that. Nice and simple to install, two leads that connect from the battery to the inverter, plug into mains and you're away.

    Are the pics not showing up in the post? Looks fine to me..
     
  5. butcherman

    butcherman Moderator MASA Contributor

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    i see the pics looks good to me
     
  6. Wes

    Wes

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    where did we get this from?
     
  7. Jayceew

    Jayceew

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    What also works well is a normal computer UPS which usually has sufficient wattage to run a pump or two, the standard batteries ran my 55watt return pump for 3 hours.

    I have now swapped out the standard 7 amps p/h batteries for 2 deep cycle 105 amps p/h batteries. Very simple to do, remove old batteries and connect new batteries with same wires, obviously there would just not be space in the UPS box for the larger batteries but in my opinion it's worth it.

    UPS - R400
    Deep cycle batteries - anything from R150 upwards, paid R1100 each for my batteries.

    Effectively means uyou could have a back-up plan for your tank anything from R550 upwards, we pay more for our fish/additives/salt...

    Rather spend some bucks on a proper back-up and save yourself plenty of stress that night when the power goes out at 22:00...
     
  8. zak

    zak Thread Starter

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  9. caddy

    caddy

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    What fitting do you need for the inverter to kick in by itself and switch off on its own? when the power turns on and off.
     
  10. Nur

    Nur Starz

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    pics of the DIY.. :) so we can steal ideas..
     
  11. Clownfish9906

    Clownfish9906

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    thx Zak...

    Am currently looking the backup solutions...
    @Jayceew

    how safe is your setup? I have been told what you are doing is not very safe as the charging unit on the ups is built for smaller batteries and not the likes of a 105ah deepcycle battery...
     
    Last edited by a moderator: 26 Nov 2015
  12. Clownfish9906

    Clownfish9906

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    hey Zak - is that a 33ah battery? Deep cycle?

    Also, what equipment are your running on the invertor?
     
  13. Jayceew

    Jayceew

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    Yes you are right, thus to get the batteries to charge to full takes longer but it gets there eventually, its also not as if your batteries get discharged every day. These chargers thus charge at very very low amps, thats why it takes long, I guess that I am compromising the longevity of the charger somewhat but its lasted me over a year so far with no issues yet.

    I did cut extra cooling holes in the ups box for in case but heat generation is minimal so not worried at all.
     
    Last edited by a moderator: 26 Nov 2015
  14. Clownfish9906

    Clownfish9906

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    ok cool - I have 2 x 600w offline ups that require batteries. I need to test them first to see that they work. I dont need to have 10hrs +, although it would be nice. Maybe using smaller batteries with maybe just the return pump and wavemake running (combined 62w)...maybe a 50w heater if it doesnt compromise the running time...

    Sorry Zak - didnt meant to hijack the thread...
     
  15. zak

    zak Thread Starter

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    There is no fitting. It's all one unit, inverter, battery charger and changeover switch.. All you gotta do is connect a battery and plug the unit into the mains.. Its a 10A charger, so no problem charging a a big deep cycle battery. And yeah, the battery is a 33AH deep cycle battery..
     
  16. Clownfish9906

    Clownfish9906

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    Thx Zak - whats the load on the invertor that you ran for over 10 hours???
     
  17. williet

    williet Look at the shiny LEDs!!!

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    @zak Cool ! I spent about 1300 on 105ah battery and had a cheap ellies 120w inverter. Runs my Tunze pumps and pellet reactor forever ! How much did you pay for your invertor ?
     
    Last edited by a moderator: 26 Nov 2015
  18. Mc

    Mc

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    Nice Idea.:thumbup: I have been thinking about doing this but just haven't gotten round to it yet.
    I didn't know you got inverters that kick in automatically.
     
  19. Clownfish9906

    Clownfish9906

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  20. zak

    zak Thread Starter

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    NO!!! Gave that a try, unit was pushing out 170Volts AC instead of 220V. I tried to have it exchanged, the supplier tested 3 units in front of me, all not working!!

    Let me help you with a solution.. Give me the combined wattage of all devices you wish to run, and for how long you wish to run them?
     
  21. mariusmeyer

    mariusmeyer

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    Its called an Auto Transfer Switch. One reason that makes these inverters more expensive than the el cheapos.
     
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