I want it all...

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EV2Go
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I want it all...

Post by EV2Go » Mon, 25 Jul 2016, 15:51

In the process of buying a large house block out Ipswich way and with it comes the opportunity to build the house of our dreams (within realistic budgets) and as part of that experience I need to wire the house starting at the street (70m away).

Now the bit I need a hand with... I am not the most electrically minded person on the planet, while I do have a basic understanding of electricity.

I have a nephew who is an electrician who is going to help out at family rates.

My nephew advised me that they no longer run wires from pole to pole like they used to, so the plan is to have a pole about 12m from the road (where the main meters will be for reading) and run all wiring underground from there to a sub box at the house.

The puzzle to be solved... I want it all, and I want it as cheap as possible.

Yes I understand that it won't be cheap, but there are ways that are less wasteful than others to achieve the same result.

I want 3 phase on the property (no problems nephew said it's easy done).

I want a big solar system (probably around 7kW)

I want super clean power for my home theatre room (been obsessed with sound for about 40 years)

One day when I finish my trike I want to be able to charge it at a decent rate.


Since I don't know the small details of how everything works I have been struggling to get my head around how to achieve this.

I am thinking bring the 3 phase down to the sub box, where each phase will have it's own filter, hook the solar up to one of the phases (3 phase solar is crazy dear) perhaps store some of the electricity in batteries to be consumed by the home theatre room only. Run the house off the solar and send back what is left over.

Diagrams, ideas, thoughts please.
Last edited by EV2Go on Mon, 25 Jul 2016, 05:55, edited 1 time in total.

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Adverse Effects
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Post by Adverse Effects » Mon, 25 Jul 2016, 16:54

and dont forget the ethernet network in the house and shed :-)

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EV2Go
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Post by EV2Go » Mon, 25 Jul 2016, 17:33

Most definitely.

Because most of the services are still out on the road I am going to need to bring power, water, NBN in from the road, and return data, switches for electric gate, and security cameras.

Always wanted one of those fancy gates that someone presses the button on the driveway and you let them in.

Heck I could get real fancy and do face recognition entry :D

Don't think I will bother bringing gas down from the street as it will probably work out cheaper to use big bottles.

I digress back on topic...
Last edited by EV2Go on Mon, 25 Jul 2016, 07:35, edited 1 time in total.

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Post by MrD » Mon, 25 Jul 2016, 19:20

The Qld electricity distributor will require multi-phase solar if you go larger than 5kW. Your 70m of ug cable will need to be sized to minimise voltage drop under full load, and minimise voltage rise under solar export (assuming you don't self-consume or store in batteries - including an EV). Refer your nephew to table C7 at the back of AS/NZS3000: Wiring Rules. The future is "all electric" - not gas - in my personal opinion.
MrD-85-TSLA

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EV2Go
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Post by EV2Go » Mon, 25 Jul 2016, 20:28

The gas if for cooking only everything else is going to be electric since I can make that myself.

Can you run 2 x 5kW systems on two different phases?

If I can make enough power I would really like to have a walk in cool room for summer.
Last edited by EV2Go on Mon, 25 Jul 2016, 10:33, edited 1 time in total.

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Richo
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Post by Richo » Mon, 25 Jul 2016, 20:59

I didn't think 3-phase PV was that expensive.
I had been looking at 15kW 3-phase for commercial properties.
Most of the suppliers try to put you on a 5-year loan plan.
The offset from the reduced power bill pays for the loan in the 5 years.
Although not as cheap as buying outright with no loan.

I guess an ESS and no company supplied mains is out of the question?
30-60kWh...
Then you could DC fast charge 100kW+ Image
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!

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EV2Go
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Post by EV2Go » Mon, 25 Jul 2016, 21:07

What prices have you been given Richo for 15kW 3 phase? The only prices I have seen were at a home show at may not be the cheapest, but they were talking circa 30k for 7kW.

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Post by Rusdy » Tue, 26 Jul 2016, 16:32

EV2Go wrote: The gas if for cooking only everything else is going to be electric since I can make that myself.


Pffft... why gas for cooking? Why not direct feed from DC bus (if you have high voltage DC bus). This guy did what I've wanted to do since yonks ago, he even went further by direct feed from solar panel (that's right, NO battery!!)

Obviously, you need induction cooker (heating element is just too inefficient):

https://www.youtube.com/watch?v=jPtBYg6N29E

I'm surprised why no one in Africa (for example) hasn't done this yet. Loads of entrepreneur made money by simply selling small solar panel to charge mobile phone batteries and small lighting. This one is even more bada$$ (and much more useful to solve .respiratory disease from cooking
Last edited by Rusdy on Tue, 26 Jul 2016, 06:37, edited 1 time in total.

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Richo
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Post by Richo » Tue, 26 Jul 2016, 20:22

EV2Go wrote: What prices have you been given for 15kW 3 phase?

$20k for 15kW
$11k for 8kW
That was using SMA tripower inverters, fully installed.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!

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EV2Go
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I want it all...

Post by EV2Go » Tue, 26 Jul 2016, 23:54

That's one serious inverter
Last edited by EV2Go on Tue, 26 Jul 2016, 13:57, edited 1 time in total.

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