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Thread: Grid Tie Solar System Solution

  1. #1
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    Default Grid Tie Solar System Solution

    We've been mulling over power solution for our office for the past long while. Generator vs Solar, and I'm really at the final stages of opting for solar, being in Jo'burg and sun being plenty.

    *CONCLUSION:*

    Best setup would be solar, no battery bank, Eskom as back-up.

    We've been monitoring our office hour consumption, and we peak at 3.2kw once a week (no air-cons or boilers or microwaves in this part of the office/DB.

    Ellies (don't crucify me) has quoted around R80k for a 3.6kW setup, using Hoymiles Grid Tie Microinverter. I most likely can "pump back" into the line with the agreement from landlord so I can access any excess for nighttime passive running of office equipments. Our electricity bill is currently around R5k a month (1.5mWh), so will pay system off in 2-3 years which is a good return on investment for an NPO.

    Would appreciate the minds of experts and hobbiest alike.

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  2. #2
    Nuon Fangirl

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    Just check if "pump back" is at all possible in SA.

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    Chat to Jacque @ https://www.bushpower.co.za

    From all the quotes and information I received from several vendors, I believe Jacque knows his stuff

  4. #4
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    Quote Originally Posted by AMZ View Post
    Just check if "pump back" is at all possible in SA.
    Yes...but!
    So, I'm not planning to "pump back" to council, but the ecosystem of our 7 storey building. I'm not going OFF GRIT, but rather a relief from Eskom. Will built capacity to use maximum energy from solar during office hours, and tap into grid when needed.

    I can't outrun CityPower and have real return on investment in under 3 years.

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  5. #5
    Nuon Fangirl

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    Quote Originally Posted by Ntjamme View Post
    Yes...but!
    So, I'm not planning to "pump back" to council, but the ecosystem of our 7 storey building.
    I hear you. Just make sure the technology will allow for that.

  6. #6
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    This setup is priced at R75k, so I suppose Ellies isn't as bad a ballpark as I anticipated.
    https://artsolar.net/product/off-gri...ab-description

    Remember, the objective isn't to run the office off batteries, but the sun and have Eskom as backup. So I really need enough battery power for 60-90 minutes in the case we have a cloud and load shedding!

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