Our recently installed 9,75kWp off-grid solar PV solution - Page 2





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  1. #21
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    Default Re: Our recently installed 9,75kWp off-grid solar PV solution

    Quote Originally Posted by Dif View Post
    Hi Hyades.

    Please email Julian with your requirements. I'd rather publish your price once we've done a proper design (similar to those in the thread above) than placing estimates here.

    [email protected]

    Ek sien nounet op julle website Awie Bosman werk daar by julle. Was saam met hom op skool.

    Sal julle in die nuwe jaar kontak vir die storie.
    Last edited by Hyades; 2017/12/14 at 01:24 PM.


    Chris
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    HYADES

  2. #22
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    Default Re: Our recently installed 9,75kWp off-grid solar PV solution

    Quote Originally Posted by Hyades View Post
    Ek sien nounet op julle website Awie Bosman werk daar by julle. Was saam met hom op skool.

    Sal julle in die nuwe jaar kontak vir die storie.
    Hehe - klein wereld. Hanro sy broer is ook by ons. Albei ingenieurs!

    Solareff - Solar PV Specialists
    www.solareff.co.za
    [email protected]
    011 675 1114

  3. #23
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    Default Re: Our recently installed 9,75kWp off-grid solar PV solution

    Quote Originally Posted by serieslr View Post
    I'm a real fan of Victron and the Quattros are excellent.
    You can even achieve the same setup as above with a PV inverter on the local side of the Victron.
    Obviously intended for grid-tie installations.
    It changes the output frequency to signal the PV that it must generate more or less power.
    (https://www.victronenergy.com/live/ac_coupling:start)
    In my case I have a SMA Sunnyboy PV and Victron at home combined functioning with the same logic as Dif explained.
    My setup is not complete yet, but the one at my collegue has been running about 2 years like that.
    There are limitations where the PV must not exceed the power of the Victron combined.
    In our case it is programmed with special firmware for increased self-consumption, where extra power is not pushed back into the grid and at night it runs off batteries.
    The Victron has a healthy built-in battery charger if your setup uses a PV inverter and not MPPT.

    We supplied a handful of 2kW Victrons to farmers in really remote places in the Karoo and they did a DIY install.
    Where the Chinese makes have been killed long time ago the Victron takes any load.
    If that Victron is rated 4 kW, it can power 4 kW 24/7 without falling over in really hot conditions.

    With the Quattro it's really nice the management of the GenSet and completely separate input into the inverter.
    No extra contactors or ATFs needed.

    Disclaimer: This is just one of my hobbies, so don't do this for a living. Just happen to have done a fair amount of research about it.
    Do you have your dump load connected to anything?
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  4. #24
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    Default Re: Our recently installed 9,75kWp off-grid solar PV solution

    Quote Originally Posted by Farway View Post
    Do you have your dump load connected to anything?
    Not specifically.
    Dump load normally refer to wind generators.

    In my case my swimming pool pump and geyser are excellent dump loads
    Geyser you heat hotter than normal 55 deg C when dumping energy.
    As mentioned my system is not up and running yet.
    But that is the idea with active load management.
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