Solar Owners/Users need help

luffyex2010 on 14/03/2019 - 13:23
Last edited 14/03/2019 - 15:14

I have recently purchased a 10kw system with a 10kw 3 phase fronius inverter.

Due to the roof space it's been split to 3 areas but two area share the same connection to the grid.

The problem I have here is that its generating a max of 7.5kw out of 10kw on a clear skies day even at noon when it's directly above the panels.

Can I get some realistic actual feedback on the generating back to the grid for 10kw solar Owners kindly as i need to know if my panels are faulty.

LG 360 neon r panels

Thanks!

Electrical & Electronics

Comments

  • cauilfield on 14/03/2019 - 13:36
    -1

    how many kWh are you getting generated on a daily basis?

    • luffyex2010 on 14/03/2019 - 13:37

      Sunny day about approx 50kw in total

      • cauilfield on 14/03/2019 - 14:07
        -1

        what state?

      • MikeKulls on 15/03/2019 - 17:44

        That output is perfectly good for the panel size you have. I have 10kw of panels and 8.2kw inverter and the highest I've got is about 61kWh in a day

  • mick123 on 14/03/2019 - 14:23
    +2

    you never (or very rarely) get the peak, they say allow about 20% off from peak KW value, and that is what you should get in good conditions

  • 0FoxGiven on 14/03/2019 - 14:27
    +2

    I think 10kW is the just the theoretical max the system can generate in an hour but its almost impossible that that number would actually be attained. Also, I have seen people always recommend getting a inverter that is lesser than the theoretical max generation capacity of the panels (unless you plan on adding more panels in the future). Like say for a 10kw panel system, you should have got a 8kw inverter system.

    But hey, i'm a noob when it comes to all this as I don't have a system myself but I am looking to get one soon. Out of curiosity, how much did this setup cost you?

    • luffyex2010 on 14/03/2019 - 14:51

      15k

    • MikeKulls on 15/03/2019 - 17:47

      It's actually the instantaneous max, at any point in time it can be generating 10,000watts

  • Archi on 14/03/2019 - 14:28

    I have only 4kw worth of panels on a 5kw inverter.

    The most I ever had is 3.5kw power generation. Average peak is about 3 and that is only for like an hour tops.

    Average for this summer was 600kw hours per month

  • ykwon10 on 14/03/2019 - 14:32

    I have 6.6kW panel with 5kW inverter. On a good day, i do get max of 5kW.

    • bohn on 14/03/2019 - 14:52

      same

      • Msfrugal on 15/03/2019 - 10:52

        Same here.

        • Cleaner on 15/03/2019 - 10:57

          Same ,melbourne

    • timthetoolman on 15/03/2019 - 12:20
      +1

      Because your inverter caps it at 5kw, plus you can't export more than 5kw for a single phase property.
      It's handy in winter though to produce more when the sun is lower

  • atris17 on 14/03/2019 - 14:34

    Any part shaded by the trees? Because the output will decrease by then. Unless you have microinverters

    However, having say that. Yeah, u rarely get 100% efficiency from solar panel

    It could be the abnormally high temperature during summer, high temperature make solar panel less efficient

    Like a phone, if it get too hot, it shut down.

    • MikeKulls on 15/03/2019 - 17:40

      Actually you never exceed around 20% efficiency with a panel

  • luffyex2010 on 14/03/2019 - 14:47

    No trees.

    Previous solar Trina with sma solar river (5 kw with 5 kw inverter)
    Generates close to 5kw on the inverter but as the years go by about 5 years later it still generates over 4kw on a sunny day.

    That is why I am confused with a way more expensive panels.

    • stirlo on 14/03/2019 - 15:19

      Most systems over provision the panels by around 30% to account for the theoretical max not being the expected power output. Surely your installer told you to have more panel capacity than inverter?

      Either way you might find the sun is no longer at it's max this time of year. I had a system installed in September and it outputted far more in November and December than it did in February. It might just be my panels getting dirty but it's definitely dropped.

      • luffyex2010 on 14/03/2019 - 15:58

        Guess I will find out the next summer lol.

        Panels getting dirty…. I never clean once for my old solar panels. So I guess it's really depends on the season and sun's UV

      • luffyex2010 on 14/03/2019 - 16:38

        It will be raining cats and dogs very soon there you go. Free solar panel wash.

  • [Deactivated] on 14/03/2019 - 15:47

    How much did you pay for the system? I'm thinking of installing the exact same thing (and two Powerwalls).

    Nvm. $15k. I see now.

    • luffyex2010 on 14/03/2019 - 16:04
      +1

      I was told that after election there might be a zero interest solar and battery option for nsw resident who has below a total combined income of 180k…. Which my family does not fall under.

      Battery is way too expensive and the math does not equate to any sort of benefits unless your house is a factory in disguise at night.

      I was told 15k onwards for a battery.

      Not worth it.

      • [Deactivated] on 14/03/2019 - 16:18

        Battery is way too expensive and the math does not equate to any sort of benefits unless your house is a factory in disguise at night.

        I like woodworking after hours. No pun intended.

        Not going to fall under any scheme (unless it is to tax me more) ever.

        • luffyex2010 on 14/03/2019 - 16:32

          Creating magic puppet Gepetto? Jk

          Give it some time the prices will be dropping with all the electric vehicles on the way.

          Maybe I should invest in Lithium Mines….. Hope it's not too late.

          • [Deactivated] on 14/03/2019 - 16:45

            @luffyex2010:

            Give it some time the prices will be dropping with all the electric vehicles on the way.

            Or demand for battery materials increase quicker than supply and the price goes up.

            Anyway, not worried about the price as it is not within my control.

            Your LG/Fro setup… Good? I want to power a huge workshop planer with that 3 phase. Have you tested out high voltage or high amperage applications yet?

            • luffyex2010 on 14/03/2019 - 17:04

              @[Deactivated]: Yes 2x 18kw ducted aircon…. Went to 19kw at peak… Almost died looking at the consumption.

              Gettng Daikin to investigate

              • [Deactivated] on 14/03/2019 - 17:21

                @luffyex2010: Industrial size central cooling? That's like 10x a big split system.

                • luffyex2010 on 14/03/2019 - 17:26
                  +1

                  @[Deactivated]: Once upon a time when I was at the dairy cool storage room at Costco. I told my wife this what I want for our house to feel like and wife replied if ever that happens she will never return home.

                  So I settled for something smaller lol.

                  • [Deactivated] on 14/03/2019 - 17:47

                    @luffyex2010: Huh. Same problem.

                    We get nightly subzero temperature during winter and my house is 28 degrees inside.

  • timthetoolman on 14/03/2019 - 16:18

    When you say that it's been splt in to 3 areas, are they still all north facing for example? Or do you have one array north and one west/east?
    A lot of people are saying they won't reach 100% which may be true, but with a fronius symo 10kw and LG neons you'd get close, I've seen them go over actually.
    Do you know what size DC cable they used by chance?

    • luffyex2010 on 14/03/2019 - 16:35

      I think its south… Neet to check my compass.

      DC cable oh boy can't tell unless I go up the roof.

      Yes I do have one array south and the other two (mental mind map and starts pointing direction recalculation) it's either north or west.

      • timthetoolman on 14/03/2019 - 16:39

        Haha if they're south facing I'd be a little worried. Could be why you're not getting your 10kw.
        I'm not sure if I've mistaken your question but if you've got 20 panels on your north roof, and 10 on your west, then you're not going to get all 10kw at the same time. You'll get the majority of power during the day, then when the west comes on you'll get that later (thus less north)

        • luffyex2010 on 14/03/2019 - 16:41

          -_- that's the culprit….

          I got a total of 28 panels of 365w each.

  • pformag on 14/03/2019 - 17:37
    +1

    Yeah, you have south facing panels, might as well not have them.

    Use this to see how the sun goes across your house.

    http://suncalc.net

    • luffyex2010 on 14/03/2019 - 17:44

      They actually change the areas last minute and put the balance of the panels to the other part of my roof…

      Too late now but at least now I know for my future upgrades.

      That is a neat website. Saved*

  • luffyex2010 on 14/03/2019 - 18:10

    it's raining mini ice balls

    • [Deactivated] on 15/03/2019 - 11:10

      Any damage?

      • luffyex2010 on 15/03/2019 - 12:48

        I don't know but it sure rain hell lot of hale balls size of marbles on my roof. Will maybe inspect after the crazy weather passes early next week.

        …. Sunday 50mm of rain

        Better drain my pool a little.

  • MikeKulls on 15/03/2019 - 17:43

    This is why you buy a smaller inverter. You might get 10kw output a few times a year for an hour. I have 10kw panels and 8.2kw inverter.

  • MikeKulls on 15/03/2019 - 17:53

    I would also add it is March, we've passed the peak time or the year for solar.

  • banana bender on 16/03/2019 - 08:11

    1.Choose a vendor/installer who can provide a desktop PC plan for your location, roof orientation etc. My "Accredited Installer" didn't even have a compass and recommended the "Rule of Thumb" design for Brisbane, maximum panels North, the remainder West. He ignored summer shading from a high-set neighbour's house S/W of mine.
    2.If you have patience and computer skills, download Zever's free planning program https://www.zeverplan.com/zeverplan/#/Home and tweak the inputs using equivalent specifications if you don't have a Zever inverter.
    3.It me took a couple of days to produce the optimum design for my tiled suburban roof, 13 305W mono panels North and 8 panels East with a 5kW Zever inverter. No shading.
    4.This arrangement generated 39kWh on a clear December day and has produced 3040KWh in the last 15 weeks.

  • luffyex2010 on 20/03/2019 - 12:38

    Today seems good… Strangely 9.02kw currently

Login or Join to leave a comment
Login Join