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SOFAR 8kW PV Installation: Opinions, Durability, Failures & Experiences with Inverters

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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #181 18760813
    matmatimateusz
    Level 2  
    Hi,

    I am going to install the installation and I am hesitating about two proposed solutions:

    First option:

    PV RISEN ENERGY RSM 60-6 310M MONO SILVER MODULE - 12 pcs
    INVERTER SOFAR 3.3KTL-X Three-phase


    Second option:

    PV RISEN ENERGY RSM MODULE 120-6- 330M MONO HALF CUT BLACK - 13pcs
    SOFAR INVERTER 4,4KTL-X Three-phase

    The prices of these installations (the valuation for me) differ cosmetically.

    My 2019 electricity consumption is 3100kwh, but I expect it to increase.
    (I am installing a 5kW air conditioning, the family will grow in some time etc.)
    at the same time, I don't want to know how much to build in reserve.
    The roof is almost perfectly south, not shaded (even with a chimney), so I'm not going to install optimizers.
    I expect you to pick the second option, but I'm curious about your opinions about these kits.

    PS.
    I'm not going to change the models of panels or the inverter anymore :)
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  • #182 18760831
    kosmos99
    Level 38  
    In the first, the permissible generator power (3600W) will be exceeded

    matmatimateusz wrote:
    My 2019 electricity consumption is 3100kwh, but I expect it to increase.


    Option two, then.
  • #183 18760842
    matmatimateusz
    Level 2  
    I know, but apparently some exceedances are allowed.
    I'm not an electrician so it's hard for me to argue with that.
    The full power installation works rather rarely (which is understandable), and even if it exceeds the maximum value,
    at most the inverter will cut off. Please correct me if I am wrong.

    of course, with the second instance, I still have the option of adding, for example, 2 panels in the future.
  • #184 18760854
    kosmos99
    Level 38  
    matmatimateusz wrote:
    I know, but apparently some exceedances are allowed.

    3600 is already an excess, because the rated power of the inverter is 3000W.

    The first option will not meet your current consumption in full, you will have to buy about 500kWh.
  • #185 18760869
    matmatimateusz
    Level 2  
    Ok, that's two more questions.
    The question of optimizers - south roof, 25st, no shading - I understand that in this case it is an unnecessary cost?
    RISEN ENERGY RSM 120-6- 330M MONO HALF CUT BLACK panel - any opinions?
    If not about the panel, then about the producer in general?

    (I will only mention that I have a nice price for them, which undoubtedly "improves" them :) )
  • #186 18763197
    AT PRO
    Level 23  
    I will not write you which option will only give food for thought regarding panels - inverter.
    I have one 3.6 kW installation in Jinko solar plus sofar 3.3 Ktl-x panels and the second still unfinished (half of the panels) 5.58 kW the cheapest panels Just solar (310w) plus 10 kW Fronius and on average the second has twice the yield at a given time than on the other the one with the sofa.
    Sofar solar is a nice inverter and works fine, but it looks like there is a difference to Fronius.
    Oh, and on the second installation, the panels are flatter, maybe that has such a big impact? The same direction.
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  • #187 18763339
    kosmos99
    Level 38  
    The rated power of this Sofar is 3kW (max 3.3), which is 600W of panel power you lose. In addition, Sofar is loaded to the maximum, so its temperature is probably higher, so the losses are greater.
    It would be more reliable to compare inverters of the same power with the same panels.
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  • #188 18763628
    AT PRO
    Level 23  
    kosmos99 wrote:
    The rated power of this Sofar is 3kW (max 3.3), which is 600W of panel power you lose. In addition, Sofar is loaded to the maximum, so its temperature is probably higher, so the losses are greater.
    It would be more reliable to compare inverters of the same power with the same panels.

    The fact that a loss is a consent because you can see on the chart how it cuts with equal sunshine.
    The temperature of the inverters is not higher because I have both of them in the open air on the ground. Fronius often does not even start the fan and the sofar does not exceed 50 degrees. Now if I put it together, Sofara would give it 4.4.
    Fronius of the 5.58 produced the most 6.9 kW.
    When I have time, I plan to connect these 3.6 to Fronius and see what they show then, I just have to invest in 40 m of cables.
  • #189 18766820
    Grucha383
    Level 12  
    Someone tried to send data from sofara to server other than Chinese? There's a Remote Server B setting on the datalogger, but I don't know how to figure it out
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  • #190 18767885
    AT PRO
    Level 23  
    Grucha383 wrote:
    Someone tried to send data from sofara to server other than Chinese? There's a Remote Server B setting on the datalogger, but I don't know how to figure it out


    Someone wrote about it somewhere but I don't remember which thread. I have accounts on solarmanpv.com and home.solarman.cn and I only send to both that I only entered the datalogger number in both.
    Which server would you like to send to?
  • #191 18768411
    zbig205
    Level 11  
    Hello. What do you think about the Sofar 3.6KTLM-G2 + 11 pcs. RISEN SOLAR 330W. What to suggest when choosing panels?
  • #192 18769203
    AT PRO
    Level 23  
    zbig205 wrote:
    What to suggest when choosing panels?


    The price and amount of space available for their assembly.
    I have Jinko Solar 400W, half mono perc etc. etc. and the advantage is short cables that do not hang under them, besides, no revelation in relation to the cheapest mono Just solar 310W. Even I have the impression that the cheap ones are sorted more to the customer's advantage, i.e. when the test gave 315W or more, they did not throw it immediately to 315W or 320W.
  • #193 18769421
    Cytro12
    Level 26  
    zbig205 wrote:
    What to suggest when choosing panels?

    To match the inverter and our temperatures.
  • #194 18770532
    zbig205
    Level 11  
    So how do you rate this statement?
  • #195 18771167
    gotycki1
    Level 7  
    Hello. I have a problem with the sofarsolar 8.8ktl-x inverter. Yesterday the overcurrent protection on the AC side worked, it is not known why and the inverter itself turned off and cannot be started. On the DC and AC side everything is ok but the inverter is dead. Do you know what is the cause? The inverter worked for 1 month, it is under warranty, but I do not know if it is and how their service in Poland works. Let me know if you know anything.
  • #196 18771230
    theo33
    Level 27  
    From the DC itself, the display should light up, if nothing else, check the voltage on the mc-4 plugs, the dc circuits, if you have through fuse-links, then to be checked, and the overcurrent one is what amperage and does it still throw it?
  • #197 18771290
    gotycki1
    Level 7  
    The DC voltage is ok. I checked the inserts - they are conductive. 16A AC overcurrent does not eject when armed.
  • #198 18771526
    Leon444
    Level 26  
    What to look for, the inverter burnt if it threw the protection, that is, there was a short circuit in the device. You are guaranteed to use it.
  • #199 18771666
    gotycki1
    Level 7  
    I think so too, I just wonder how with the service in Poland. How long may it take to repair.
  • #200 18771745
    theo33
    Level 27  
    Warranty with invoice via distributor or retailer,
    Dc voltage what? how many modules connected to the input?
  • #201 18771794
    gotycki1
    Level 7  
    560V input, 16 modules per string.
  • #202 18771814
    theo33
    Level 27  
    It's ok. It's below 1000, I wanted to make sure that maybe the voltage didn't exceed
    I wonder if this damage was influenced by any external conditions, were there any discharges nearby? and did the 25A pre-meter protection also work?
  • #203 18772376
    gotycki1
    Level 7  
    At the time of the failure, there was no storm or lightning. There was a storm that day, but a few hours earlier. The 25A pre-meter protection also worked.
  • #204 18772413
    slaslo
    Level 17  
    Kolego gotycki1 as soon as the complaint procedure starts, describe who took care of it and how it is going.
    I think that every Sofar owner will be interesting.
  • #205 18772451
    AT PRO
    Level 23  
    SOFARSOLAR Poland

    ul. Jórskiego 30, 03-584 Warsaw

    VAT: PL5272915147 | REGON: 385117650 | KRS: 0000819731

    T: +48 22 4902099

    E: service.pl(_at_)sofarsolar.com

    SERVICE

    T: +48 22 123 98 58

    E: serwis(_at_)sofarsolarpoland.pl

    www.sofarsolarpoland.pl

    Poland Distributor and Service partner

    Corab Sp. z o. o

    EnergyNAT Sp. z o. o
  • #206 18772522
    gotycki1
    Level 7  
    Thank you very much for sending the contact to the website.
  • #207 18772655
    kris161rp030
    Level 13  
    Hello, I bought a Sofar 11KTL-X for my PV installation last week. Are the certificates from this file sufficient to report to the energy company https://fotowoltaika.corab.eu/do-pobrania/c certaty/c certaty-falownik-sofar - do you still have to look for or attack the seller? Greetings
  • #208 18772712
    Cytro12
    Level 26  
    Yes, it should be enough, I also attached the manufacturer's certificates with the application.
  • #209 18772771
    gotycki1
    Level 7  
    I attached the certificate I just downloaded from the Corab website and it was accepted.
  • #210 18816831
    zbig205
    Level 11  
    Gentlemen, an urgent matter. Do you know something about the SUNGROW company, namely the SUNGROW SG3K6-D model.
    I was supposed to have a Sofar Solar 3.6KTLM-G2 installed and SUNGROW has just arrived. Should you request replacement according to the contract or agree to this inverter?
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Topic summary

The discussion centers on experiences with Sofar inverters in approximately 8kW photovoltaic (PV) installations, focusing on technical issues, durability, and configuration challenges. Users report generally stable operation with models like Sofar 6.6KTL-X and 5.5KTL-X over extended periods, though some face connectivity problems, especially with Wi-Fi and software availability. A recurring technical problem involves input voltage exceeding the maximum allowed 600V DC for single-phase Sofar inverters (notably the 4KTLM-G2), causing errors such as PVOVP and BusOPV and inverter shutdowns. This is often due to too many PV panels connected in series on a single string, with 15 Q.CELLS Q.PEAK G4.1 305W panels sometimes exceeding voltage limits, especially in cold conditions where voltage rises. Solutions include splitting panels into two strings (e.g., 8 and 7 panels) connected to separate MPPT inputs, though some users report this does not fully resolve the issue. The maximum recommended panels per MPPT input is around 9 to avoid surpassing power and voltage limits. Users also discuss the need for three-phase inverters for larger installations above 7kW on a single phase due to grid operator restrictions. Software and firmware updates are sought after but not easily accessible, with some users lacking Polish language support. Comparisons with other brands like SMA and Fronius highlight Sofar's cost advantage but raise concerns about long-term reliability and service support, which is still developing in some regions. Network-related errors such as Grid OFP (over-frequency) have been reported, with troubleshooting involving network frequency checks and inverter restarts. Overall, Sofar inverters are considered a cost-effective option with some technical caveats related to system design, installation quality, and support infrastructure.
Summary generated by the language model.
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