Grid tie inverters

Discussion in 'Power cuts' started by butcherman, 18 Jan 2015.

  1. butcherman

    butcherman Moderator MASA Contributor

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    So with the price of eiskom set to sky rocket, anyone know if gird tie systems are feasible. Not to sell back to eskom but to reduce consumption.

    I have already gone led downlighters, new fridge, insulation, etc

    I wonder if anyone is doing this yet?
     
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  3. RiaanP

    RiaanP Moderator

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    as far as I know the grid tied systems are only legal in Western Cape at this moment. There they run your account to zero if you supply more than you use. Do not buy back from you. But it would still be great, during the day you provide power to the grid to offset your overnight consumption.

    Anyway, so far in Gauteng these systems are not available.

    Would like to do it, as it would remove the need for multiple batteries, both saving in setup costs and space.
     
  4. butcherman

    butcherman Thread Starter Moderator MASA Contributor

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    that's the whole idea. plus how awesome would it be to reduce your electricity bill. Especially if you could do it modularly.
     
  5. mariusmeyer

    mariusmeyer

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    Main problem is the initial outlay on panels. at R10 per watt and lets say you want to generate 1000Watts an hour, the panels alone will set you back R10,000. Then you still need the grid tie inverter and installation costs. So I think you are looking at R20,000 outlay. And at 10Kw per day you will only be saving around R400 a month on your bill.

    So a very long term payback. I love the idea and I have considered it myself but the capital outlay is putting me off.
     
  6. Glynn

    Glynn

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    I am busy looking at a 14kw system at my place ...seems as you scale the system less than 20k per kilowatt is achievable ...In durban we get about 5 hours on ave per day so about 2000 plus kWh per year which currently is a 13% yield on capital. Certainly better than money in the bank!! The battery back up part is when things gets pricey ,,
     
  7. butcherman

    butcherman Thread Starter Moderator MASA Contributor

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    this to me also seems like a bank breaker

    perhaps not with eskom set to increase prices steply in the next 3 years this option will become more and more attractive in coming months....
     
  8. dallasg

    dallasg Moderator MASA Contributor

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    i can take my house off grid for about R23k but looking at using a microcare 3kva grid-tie inverter, made in PE, but that alone is R18k so will bump me up too R35k

    my whole house is lit using less than 120W of light, but biggest user are the aircons

    it also helps that i am in the industry
     
  9. Glynn

    Glynn

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    What I'm doing is isolating so called essential outlets and only building battery back up for about 3 kW for 3-4 hours. This does save a lot on batteries and charges.
     
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  10. dallasg

    dallasg Moderator MASA Contributor

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    we sell batteries to the cellular guys, last 7 days but R35k each :)
    might be worth it at some stage
     
  11. LCornelius

    LCornelius Moderator

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  12. dallasg

    dallasg Moderator MASA Contributor

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  13. LCornelius

    LCornelius Moderator

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    I got my 135w solar panel from them that I use when we go into the bush.
     
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