My complete off-grid setup home. - Page 2




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  1. #21
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by BluePaj View Post
    There's a guy down the road from me who went off grid.

    He did not want to change anything in his house and hates gas so everything is still full electric, stove, geyser etc he has 60,000 btus of aircon in the house too.

    His system ran him about R750k with the batteries being the biggest cost due to the massive amp draw.
    60,000 BTUs of aircon? Good grief, that must be an aircon in every room? A standard high output 250v is max 12,000BTU?

    I'm not surprised it cost him that, but he can't be struggling for money when the aircon unit costs must be over R50k........
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  2. #22
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by jelo View Post
    What would you charge for a ballpark assessment?

    I just need an amount to work towards, not anything cast in stone.
    I wouldn't charge anybody. It's a hobby in my retirement.

    I did the courses to supplement my formal training, qualifications and lifetime involvement in electronic systems.

    Kinda like somebody who cooks all the time doing a cooking course, or a coffee lover doing a Barista course. (Pretty sure there must be a brewing equivalent)

    Or maybe even an accomplished 4x4'er doing an advanced driving or recovery course.

    ------------------------

    It really is quite simple to break it down into fairly discrete and easy to do steps. A couple of simple questions that need answers. I have never actually sat down and put together a proper list.
    Cheers

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  3. #23
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by Fluffy View Post

    It really is quite simple to break it down into fairly discrete and easy to do steps. A couple of simple questions that need answers. I have never actually sat down and put together a proper list.
    I'll be the proefkonyn (i can't spell guineau pig as you can see).

    New thread? Maybe we help somebody else as well.
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  4. #24
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    Default Re: My off-grid house.

    Op what part of the country is the property located?

  5. #25
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by jelo View Post
    I'll be the proefkonyn (i can't spell guineau pig as you can see).

    New thread? Maybe we help somebody else as well.
    I'm thinking a nice flow chart.

    I will work on it and start a new thread.
    Cheers

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  7. #26
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    Default Re: My off-grid house.

    Quote Originally Posted by Skylark View Post
    Op what part of the country is the property located?
    Spain. Between Barcelona and Valencia, but inland.
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  9. #27
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by jelo View Post
    60,000 BTUs of aircon? Good grief, that must be an aircon in every room? A standard high output 250v is max 12,000BTU?

    I'm not surprised it cost him that, but he can't be struggling for money when the aircon unit costs must be over R50k........
    He had a 24,000 btu just for the garage and "Liked to live in the arctic" in the rest of the house. If I remember correctly his electric bill used to be R4k+ per month.
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  10. #28
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by BluePaj View Post
    He had a 24,000 btu just for the garage and "Liked to live in the arctic" in the rest of the house. If I remember correctly his electric bill used to be R4k+ per month.
    I probably have that much. Lets see 35K + 12K + 12K + 12K. Easy peasy to get to 60K btu. Not excessive at all. Lounge and three bedrooms. My previous house in Durban had 35 +12 +12 +12 +12 +18. Never ran more than 2 or 3 at a time, the mains breaker would trip.

    The trick to off-grid is energy management. The national grid has a Base Load and a Peak Load, just like a car needs only so much oomph to cruise but much more to accelerate and climb mountains.

    If you design a home system for peak consumption you gonna hurt your pocket.

    So you manage your consumption. Only the aircon on in the room you are in. Only use the aircon when the system is producing free power. There are now automatic home energy management systems becoming available. So basically a PLC that monitors and controls.
    Cheers

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    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  11. #29
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    Wink Re: My complete off-grid setup home.

    ...and I thought my 9k btu was doing o.k!
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  12. #30
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    Default Re: My complete off-grid setup home.

    I have a 12,000BTU that keeps a 14 m3 coldroom at 6degC without even running constantly.

    24,000BTU just for the garage leaves me dumbstruck.
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  13. #31
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by jelo View Post
    I have a 12,000BTU that keeps a 14 m3 coldroom at 6degC without even running constantly.

    24,000BTU just for the garage leaves me dumbstruck.
    It probably wasn't a single garage..

  14. #32
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    Default Re: My complete off-grid setup home.

    Has anybody heard of a Sirius Capacitor? it was designed to replace a normal battery bank.
    I have only heard of two installations on farms that previously used PV / batteries and both are very happy with the result.

    Different to a conventional lead acid or any exotic material batteries they can be drained to 0% with no damage and can be fully charged in a fraction of the time.
    Heat in conventional batteries increase resistance and reduce the batteries life while capacitors are not susceptible to these problems and can operate a a much higher temperature.
    They have a much longer lifespan and can be drained and recharged a million times instead of a few thousand times like normal batteries.
    They claim that their capacitor storage will outlive the life of the PV solar panels they are attached to, which will save a lot of money in the long run.
    They cost a little less than a similar size battery installation and can be upgraded in series as demand require.

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  16. #33
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by Dawid Rabie View Post
    Has anybody heard of a Sirius Capacitor? it was designed to replace a normal battery bank.
    I have only heard of two installations on farms that previously used PV / batteries and both are very happy with the result.

    Different to a conventional lead acid or any exotic material batteries they can be drained to 0% with no damage and can be fully charged in a fraction of the time.
    Heat in conventional batteries increase resistance and reduce the batteries life while capacitors are not susceptible to these problems and can operate a a much higher temperature.
    They have a much longer lifespan and can be drained and recharged a million times instead of a few thousand times like normal batteries.
    They claim that their capacitor storage will outlive the life of the PV solar panels they are attached to, which will save a lot of money in the long run.
    They cost a little less than a similar size battery installation and can be upgraded in series as demand require.
    yes, they are called super capacitors but can't be used for slow discharge storage as far as I know?
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  17. #34
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by jelo View Post
    Thanks, you don't say what the capital outlay was?
    that's like asking a woman what her age is... obviously the answer is A LOT!
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  18. #35
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    Default Re: My complete off-grid setup home.

    My apologies, I should have done more research about the The Kilowatt Lab Sirius Capacitor before I posted the question.
    There is a YouTube video of it being tested by people with calibrated test equipment to see if Kilowatts claims are real.
    Their verdict is that the voltage discharge graph is not that of a capacitor, they believe it follows that pattern of a lithium oxide battery.
    It also required a lot of standby energy to keep the electronics running so much so that it will run itself down fairly quickly if it is not recharged.

    it is not what I expected.

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  20. #36
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by rourke View Post
    This is a big great system bigups.

    I am sure the capital outlay was big here except the geset(Just the solar system).

    What amazes and confuses me is your calculations here. They are great and look to be accurate.

    Maybe you can help me some ? in a PM?if i can?

    But just as a background.

    I am from a big family and extended family but thats not important , what is important is that we have some family home lands much as the SA rural comunities.

    So i have a 200m by 100m land layout.

    I have built a rondaval that needs finishing and i need quarters for a care taker and some1 to be around when we not as the locals have a tendancy of stealing and pilaging.

    Now back so 20 years when things were still right with eskom they did a bulk outlay of prepaid electrical systems to the comunity. but since then people that build now have to pay for installation of transformers and layout untill your newly or old built dewling.

    This has cost some 15k to 20k in rands and then eskom requires you to have the service of this at Billing rates for about 5 years before you can go prepaid.

    So have asked for quotes and have gotten quotes from eskom for 80k +. This is scary.

    I have to still locate the nearest pole and transformer to me and get a quote.

    I was thinking of going solar, gas, wood etc as to be off grid, as my mind is also telling me that the future is bleek in terms of electrical rates from eskom. Everything goes up is SA except salary/wage rates.

    I know the capital outlay will be big but i need beter calculations to be able to know what exactly to get .

    I only have 1 child and my wife for now , but will need the home to be electrified and as i build on to the exsisting dwelling we will need to extend the electrification, but thats not in the near future.

    It will be our holiday and visiting home for now.

    Should i go Eskom or SOLAR,GAS,WOOD?

    Cheers
    Hi guys so what you thinking here?

  21. #37
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by rourke View Post
    Hi guys so what you thinking here?
    Based on the expansion fee monthly one MUST go providing for yourself.

    Heating water I would go solar geysers with heat pump as back up via solar panels and battery if needs be. Just limit the run time of the heat pump.

    Cooking go the gas route.

    Lighting solar panel and inverter route.

    My 2c.

    Sizing you would need to provide the loads and start small and add. Ensure you use inverters that can work in ||.

  22. #38
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by ekkekan View Post
    Based on the expansion fee monthly one MUST go providing for yourself.

    Heating water I would go solar geysers with heat pump as back up via solar panels and battery if needs be. Just limit the run time of the heat pump.

    Cooking go the gas route.

    Lighting solar panel and inverter route.

    My 2c.

    Sizing you would need to provide the loads and start small and add. Ensure you use inverters that can work in ||.

    Yes hi

    Yes gas will go

    for the lights was also thinking about it solar or maybe just do dc12v lights

    Yes will think on going parall linking inverters

  23. #39
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    Default Re: My complete off-grid setup home.

    Quote Originally Posted by rourke View Post
    Yes hi

    Yes gas will go

    for the lights was also thinking about it solar or maybe just do dc12v lights

    Yes will think on going parall linking inverters
    12v lights is cheap and easy, but does limit you. I have emergency lighting that we use just about all the time. Your cable sizing becomes a problem to push 12v that far. My longest run is probably around 30m on 2.5 cabtyre, that I jump off with 1mm ripcord onto seperate switches to the usual 220v circuit. Does not look great with multiple switches and lights in every room. But I can live with it.

    Inverter just means losses that I can't afford on my little system that is nothing more than a few old truck batteries. But if you going anything bigger/better, inverters that can work together work best so you can build your system as you go.
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