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Author Topic: Off grid solar in 2018  (Read 2274 times)

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Milspec

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Off grid solar in 2018
« on: June 14, 2018, 05:37:48 am »

We will be building a new home on a rural property but plan to build a 200sqm industrial shed first and live from there while we build the house. It would cost us about 20K to get a power pole to the building site but we not going to bother with that, we are going to install an off-grid solar + battery + diesel generator system which will cost about the same. The panels will go on the shed roof so there will be ample space for solar panels up to 10Kw+

We prefer well made (reliable) gear over cheap & cheerful and are prepared to pay the premiums that usually entails. I am interested to hear recommendations about what to buy or avoid buying (i.e. specific brands and models of inverters, panels and batteries) from others who have installed home solar systems. Also interested to know if people have had good/bad experiences with particular companies in Sydney/Canberra.
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Arkane

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Re: Off grid solar in 2018
« Reply #1 on: June 15, 2018, 10:04:10 am »

The sticking point in any off-grid power system is battery storage/cost.

Sometimes a smaller solar panel / battery bank supplemented by the regular use of a diesel generator during peak demand times (like an hour per day) works out better in the long term!

At one stage I used a genny from 5pm to 6pm every night, I washed clothes and showered then and a battery charger topped of the batteries for the evening/overnight use!

I used about two litres of diesel a day but saved several thousand dollars on battery costs and solar panel costs

Back in the 80's so batteries, panels and diesel prices were different then!
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graynomad

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Re: Off grid solar in 2018
« Reply #2 on: June 15, 2018, 07:41:02 pm »

I've been off-grid for 20 years, but I DIY so have little idea of the retail costs. However my neighbour had a 2kw system fully installed for $20k and he is well happy with it even with the roof being at the wrong angle and they don't have a gennie. QLD firm though so not directly applicable to your location, but you should be able to live well if you can go to 10kw.
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Gympiegoat

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Re: Off grid solar in 2018
« Reply #3 on: June 15, 2018, 07:49:43 pm »

Milspec said:-
We will be building a new home on a rural property but plan to build a 200sqm industrial shed first and live from there while we build the house. It would cost us about 20K to get a power pole to the building site but we not going to bother with that, we are going to install an off-grid solar + battery + diesel generator system which will cost about the same. The panels will go on the shed roof so there will be ample space for solar panels up to 10Kw+

We prefer well made (reliable) gear over cheap & cheerful and are prepared to pay the premiums that usually entails. I am interested to hear recommendations about what to buy or avoid buying (i.e. specific brands and models of inverters, panels and batteries) from others who have installed home solar systems. Also interested to know if people have had good/bad experiences with particular companies in Sydney/Canberra.

I had the same situation 3 years ago when I was setting up one daughter's doomstead outside town. Off grid solar was dearer then, I was quoted $30,000- $35,000 for adequate system to run the house, shed & cottage( my bug out location ) & dam pump so I got local elec supplier, SEQEB, to supply transformer & two poles to run power in for $5,600. Still reliant on grid but not broke either & can get a cheap off grid system & today's prices when needed.

This fellow supplies quality second hand solar panels & second hand Telstra batteries for a reasonable price compared to new. Might be worth considering or might suit other Queenslanders on oz Prepper. He has all different configurations from 1kw @ $1,900 & up.

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graynomad

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Re: Off grid solar in 2018
« Reply #4 on: June 15, 2018, 07:56:29 pm »

Bugger, I just bought a heap of batteries and that guy is close to me. :(

You say he has second-hand panels as well? I can't see that.
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Gympiegoat

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Re: Off grid solar in 2018
« Reply #5 on: June 16, 2018, 05:50:43 am »

I think it was him , he had them as a separate listing last week @ $100 each. 250's I think. Give him a ring & see what he has.
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doomsdayprepper4570

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Re: Off grid solar in 2018
« Reply #6 on: June 28, 2018, 05:31:25 pm »

2nd hand panels $50 each.
Midnite solar controllers $750 each landed from states.
Latronics inverter 3kw 24volt 2nd hand $1500 (these units are tanks and made in qld)
Trojan L16H carbon series batteries from maryborough are $710 each.
435 amp , 6 volt and are fantastic so far (3 years in)
I could piece together a fantastic system for under $20K
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graynomad

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Re: Off grid solar in 2018
« Reply #7 on: June 28, 2018, 05:50:23 pm »

I still haven't got any panels Russ, but looks like there are 15 in Bundy for sale, I will grab them I think.
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doomsdayprepper4570

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Re: Off grid solar in 2018
« Reply #8 on: July 16, 2018, 07:19:34 pm »

$50 each Rob?
And what wattage mate?
And VOC an make?
These are trinas from the coast, 250 watts
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graynomad

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Re: Off grid solar in 2018
« Reply #9 on: July 16, 2018, 07:44:55 pm »

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$50 each Rob?
And what wattage mate?
And VOC an make?
These are trinas from the coast, 250 watts

Trinas, 190W, VoC is pretty high, 45v. At first I decided that was too high but then I looked at the ones I got from you a while back and they were the same. I have a 24v system so really should get an MPPT reg but I'd need two of them and no way I can afford that. I still have to buy a second PWM reg though.
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doomsdayprepper4570

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Re: Off grid solar in 2018
« Reply #10 on: July 16, 2018, 07:53:33 pm »

Yeah you need a midnite reg Rob.
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graynomad

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Re: Off grid solar in 2018
« Reply #11 on: July 16, 2018, 08:00:37 pm »

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Yeah you need a midnite reg Rob.

I would need 3kW @ 24v, most I've seen can only do that power at 48v.
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graynomad

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Re: Off grid solar in 2018
« Reply #12 on: July 16, 2018, 08:11:10 pm »

Looks like the Midnite CLASSIC 150 can handle 96A @ 24V, that would work. But it's $1175, yikes! If I duplicate my existing SunStar I can get out of it for < $400, but with less efficient use of the panels.
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doomsdayprepper4570

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Re: Off grid solar in 2018
« Reply #13 on: July 17, 2018, 11:47:26 am »

Yeah I bought a few at higher exchange rate Rob. They are around $600 US most times.
I will spring you one for $800 if you want.
Postage adds a fair whack as well.
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graynomad

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Re: Off grid solar in 2018
« Reply #14 on: July 17, 2018, 12:27:02 pm »

Which model do you have? I'll research it better and see if I can sell my first born :)
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