3 Phase Power Enquiry New Home Build

rsingh87 on 29/01/2024 - 18:48
Last edited 29/01/2024 - 19:05

I was interested in purchasing some land that is a strata lot, there are 8 lots on the same plot of land that share a driveway. I was wondering would anyone know if I am able to install 3 phase power to this type of lot? this is the only lot of land not built on the others all have houses already.

Also, its a no brainer to get 3 phase power on a new build, right? for extra solar panels and or car charging in the future? as it's only a small house 260 sqm of land one solar installer said he didn't see much point, but I though even battery aside its worth its for the cloudy days when you only make a fraction of the power?

Also on my current property i have 18 370 w longi panels, although now I noticed newer panels from china are 440 w, is that difference only noticable during peak sun? or do you also get more solar energy at other times?

Home & Garden

Comments

  • MS Paint on 29/01/2024 - 18:53
    +1

    More importantly you can get a legit car lift in the shed with 3 phase.

    260 sqm of land

    NVM. Missed that bit. My shed is 400sqm.

    • rsingh87 on 29/01/2024 - 19:06

      whoa thats huge

    • Sye on 30/01/2024 - 01:36
      +3

      My s̶h̶e̶d̶ grow house is 420sqm

      FTFY

  • brendanm on 29/01/2024 - 21:21
    +1

    260m2 of land, you are not going to get anywhere near enough solar on the roof to go 3 phase. Block sizes are out of control.

    • rsingh87 on 29/01/2024 - 21:37

      my current house is the same block size, but with north east and north west panels and it actually maxes out for 2-3 hrs during peak sunlight at 4.8kwh with a 5kwh inverter. So even with no extra panels I would make more power if i had a three phase inverter I guess? and theres still sides of the roof that are empty so Im pretty sure I could fit more panels on it easily. I say that because the new house will probably be of a very similar size to our current one.

      • brendanm on 29/01/2024 - 21:42
        +1

        No, you won't be making more than that with a bigger inverter. My 5kw inverter makes 5kw. Surely some of the roof will be completely unusable solar wise? Also, putting more panels on will likely only extend the period you make power for, not make more with limited real estate.

        • rsingh87 on 29/01/2024 - 21:47

          I understand on other sides of the roof you make fair bit less, but its still something right? and the cost of adding more panels is not very high?

          • brendanm on 29/01/2024 - 22:00

            @rsingh87: You do you I don't think it would've anywhere near enough to justify 3 phase, but if you have some other reason for 3 phase, go for it.

  • conan2000 on 29/01/2024 - 21:30

    Not sure about the impact on solar, but I would say it's a no brainer for future proofing. Ducted A/C, Induction cookers, electric car chargers. It was a relatively small cost overall to add 3-phase.

    • rsingh87 on 29/01/2024 - 21:37

      yeah thats what i thought

  • Lichen6420 on 29/01/2024 - 21:33

    My house is 270sqm (Single story). I have 20kw on the roof, could easily fit another 10-15kw.

    3 phase during the build process is a cheap basic upgrade. Gives you better options for solar system size limits, car chargers (most houses will likely end up with 2). Lots of spare room for future expansion.

    • rsingh87 on 29/01/2024 - 21:45

      hey thanks for that, yeah I thought even with a small house you can fit a fair bit more than what you would get with single phase power. Yeah good point for car chargers and future proofing a small fee to pay at the beginning for all that, seems like a no brainer.

    • lgacb08 on 30/01/2024 - 17:02

      There is a big difference between 260m2 of land and 270m2 house.

  • Euphemistic on 29/01/2024 - 22:52
    -1

    Start with finding out if you can do it first. Being a strata lot, the power supply may not be available. The extra phases might already be feeding other lots

    Unless you are planning on running serious tools in the shed or charging 2 EVs for half their range daily its probalh not worth it. Installing extra solar panels for peanuts per kwh isnt worth it. Size any solar systsm for your daily usage - including charging houshold batteries.

    • rsingh87 on 29/01/2024 - 23:10

      Yeah I thought it being strata might be an obstacle, I suppose if it’s available I’d get it, if not then it’s not the end of the world as it probably would not have made a huge difference,

    • deme on 30/01/2024 - 09:20

      3 phase is faster for charging

      • Euphemistic on 30/01/2024 - 15:52

        But do you need to have faster charging?

  • netjock on 30/01/2024 - 10:15

    18 370 w longi panels, although now I noticed newer panels from china are 440 w, is that difference only noticable during peak sun?

    In short now.

    Same sun 370W will output 370W and 440W will output 440W per design. Might be a small difference due to efficiency because newer designs etc.

    Total panels if it is say 6000W of 370W and 6000W of 440W you still will get 6000W like for like.

    I wouldn't worry too much about it.

    • rsingh87 on 30/01/2024 - 11:12

      Oh I see thanks, do you expect solar panels to become noticeably more efficient in the next few years or stay roughly the same?

      • netjock on 31/01/2024 - 09:49

        For you and me at the budget to medium end not going to make a major difference. Panels used to be 250W then 370W, now 415W to 440W. I expect same size will go to 500W in the near future. It means more watts for same size panels which means for 6.6Kw it will take up less roof space.

        Suggest when building look at design of the roof to maximise space for panels rather than too many valleys that make mounting difficult.

        Good luck!

      • Euphemistic on 31/01/2024 - 13:59

        Cant see them getting much more efficient unless there is a major breakthrough in tech.

        The main reason you can get higher wattage panels is simply that they are bigger. The individual solar cells are very similar in efficiency, more wattage just means more cell which mostly means a bigger panel.

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