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The panel inverter shuts down especially on Sundays and public holidays

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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 18622254
    Slawek K.
    Level 35  
    Currently, the problem has worsened due to significantly lower energy consumption by industry. Last Saturday, in one of the towns near me, where there are many installations from municipal subsidies, PGE remotely disabled energy reception, which was officially confirmed and to which they are entitled.
    Fortunately, there were no subsidies in my city, there are only individual installations, so there are relatively few of them. Nevertheless, we will be dealing with this phenomenon in the near future, until the heat comes and we fire up the air conditioners ;)

    Greetings
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  • #32 18622455
    AT PRO
    Level 23  
    Slawek K. wrote:
    Last Saturday, in one of the towns near me, where there are many installations from municipal subsidies, PGE remotely disabled energy reception, which was officially confirmed and to which they are entitled.


    Greetings


    Do you know the details of how it happened, or simply increasing the voltage above 253V did the job of limiting production from the installation?
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  • #33 18623505
    Slawek K.
    Level 35  
    Many inverters on the line turned off, after the intervention in the Commune, then at the Contractor of all installations, he also obtained such information at PGE after the intervention. An error flashed on the inverters, I don't know exactly what, but I think there must have been a desychronization with the grid, perhaps as a result of a deviation from the normative frequency, but I don't know exactly.

    Greetings
  • #34 18625186
    zerolinux
    Level 12  
    Good morning everyone.

    I also have a problem with the Growatt 3kW 1f controller turning off due to too high voltage.

    The logs show that it temporarily exceeds 253V.

    When the team from PGE came, it turned out that the measurement of the voltage on the meter when the inverter was turned off (the fuse was turned off) gives the result of 142V, after turning it on, it increases to 148V.

    Of course, the gentlemen from PGE are not eager to "fumble" around the transformer.

    However, I am wondering about the sudden voltage increase after switching on the inverter. After all, from the power supply side there should be a "bottomless well" and my 3kW is like a "butterfly fart".
    Maybe something is wrong with the connection to the pole?
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  • #35 18625244
    theo33
    Level 27  
    I think you mean not 148 and 248, if this is the case with the meter and you had more than 253 on the logs, then in this section you need to improve the installation, probably by increasing the cross-section
  • #36 18625298
    zerolinux
    Level 12  
    Quote:
    I guess you mean not 148 but 248

    Yes, of course, the voltage is 248V.

    Quote:
    if this is the case with the meter and you had more than 253 on the logs, then on this section you need to improve the installation, probably by increasing the cross-section

    From the meter to the 2nd box, the cable is 6mm (50m), and from the box to the inverter is 2.5mm (15m)

    So that we can understand it well, when you turn on the inverter, the voltage increases so much at the meter and inverter, not only at the inverter.
    From the meter to the terminals and further to the pole, I do not know what the diameter is, but it was done by the energy company and PGE apparently had no objections.
  • #37 18625382
    kosmos99
    Level 38  
    How far are you to the destination?
    Changing the phase can help, or switching the load on the phase that the inverter is on.
  • #38 18625392
    zerolinux
    Level 12  
    I do not know.

    How can I find out?

    Guests from PGE claimed that a large part of the city is powered from it and that if they lower it, it could be a problem.

    About 10 years ago there was a network renovation, poles and wires were replaced.
  • #39 18625411
    kosmos99
    Level 38  
    zerolinux wrote:
    I do not know.

    How can I find out?

    Guests from PGE claimed that a large part of the city is powered from it and that if they lower it, it could be a problem.

    There is no need to elaborate on it.
    As I wrote above, it would help to load e.g. a boiler heater.
    Or on your own (not necessarily personally) connect to another phase.
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  • #40 18625918
    theo33
    Level 27  
    zerolinux wrote:
    Quote:
    I guess you mean not 148 but 248

    Yes, of course, the voltage is 248V.

    Quote:
    if this is the case with the meter and you had more than 253 on the logs, then on this section you need to improve the installation, probably by increasing the cross-section

    From the meter to the 2nd box, the cable is 6mm (50m), and from the box to the inverter is 2.5mm (15m)

    So that we can understand it well, when you turn on the inverter, the voltage increases so much at the meter and inverter, not only at the inverter.
    From the meter to the terminals and further to the pole, I do not know what the diameter is, but it was done by the energy company and PGE apparently had no objections.


    According to my assessment: on the section "from the box to the inverter it is 2.5mm (15m)" power in a 3kW 1-phase system and 2.5 mm2 wire cross-section, the voltage drop will be 1.2%, while in the section "From the meter the cable to the 2nd box is 6mm (50m) "with power in the layout. 1-phase 3kW and a cross-section of 6mm2, the decrease is 1.6%, if it adds up, you have 2.8%, which gives about 6.5V and where you can improve this decrease as much as possible, at least over the distance of 15 m to the waveform replace with at least 4mm2
  • #41 18627306
    zbyszekkr
    Level 17  
    zerolinux wrote:

    Guests from PGE claimed that a large part of the city is powered from it and that if they lower it, it could be a problem.
    "a large part of the city powered by one transformer" - what is this nonsense?
  • #42 18842952
    kriss032
    Level 21  
    lichtar wrote:
    I can see that a lot of users have the same problem and so far not resolved effectively. Are there any voltage limiters that could be connected between the inverter and the connection?


    You are right, use an autotransformer between the grid and the inverter that will lower or increase the voltage
  • #43 18843952
    sq9fmc
    Level 29  
    Advice is harmful as the voltage in the network will continue to increase.
    On the micro installation connection diagram, will you also update and draw this autotransformer? I wonder what the OSD would say about such solutions.
    The 253V limit is adopted to protect devices in the network, including the user.
  • #44 18843992
    sigwa18
    Level 43  
    I used a set of voltage monitoring relays set so that at a specific voltage (exceeding the threshold), let's say 2-3 V lower than the inverter error (emergency shutdown) threshold, they would turn on the heater in the boiler and thus lower the voltage.
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Topic summary

The discussion revolves around issues with a panel inverter shutting down, particularly on Sundays and public holidays, attributed to high voltage levels in the network, reaching up to 253V. Users suggest various solutions, including contacting the power distribution operator to address voltage issues, adjusting inverter settings, and improving wiring connections. Some recommend using additional loads, such as heaters, to reduce voltage during peak times. The importance of proper cable sizing and installation practices is emphasized, with suggestions to upgrade cables from 2.5mm² to 6mm² to mitigate voltage drop. Users also share experiences with different inverter brands and the need for voltage monitoring systems to prevent shutdowns.
Summary generated by the language model.
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