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

In my opinion, it will display an error, will not produce and will cut off the PV input to avoid damaging the IGBT. It`s different with the service, if you tell them that you want FW, they will ask if the inverter is working properly and if you just want newer software, they probably won`t provide it to you... You can upload some from the Internet, as long as the model is correct. When updating, it is worth paying attention to the ARM MCU version, there may be problems with updating the microprocessor to a higher FW. For me it ended with 3.02 and there was only an ARM file error

I still have a question about whether we want to expand the installation correctly. Of course, it will be done by a company with permissions, I don't want to do it myself, I just want to make sure that we are doing it right.

Sofar 8.8 KTL-8

Maximum operating current 11A, short-circuit current 14A
MPPT operating voltage range 160V–960V
Full power MPPT voltage range 380V-850V
Maximum input current 1000V.

I currently have 22 310W panels installed, divided equally into 2 strings of 11 panels each.
Nominal current 9.43A, nominal voltage 32.88V, open circuit voltage 40.22V, temperature coefficient -0.30%/K
I want to add panels to this installation, hence the idea to put the old panels on one circuit and add the new panels on the second circuit.
Wouldn't 22 old panels on one circuit be too much? Can you leave them whole or would it be better to remove 2 for safety and leave 20 of them?
The new panels have a current of 12.13A and a short-circuit current of 12.9A. Will they work with the Sofar 11A/14A parameters? It's hard to find anyone in the area who has panels below 11A. I would like to add 10 or 12 such panels to the second circuit.

If I count correctly, theoretically I should not exceed 960V or 1000V. 22 panels x 40.22V open circuit x 12% voltage increase for -15°C temperature. = 991V. The question is whether this can be the case or whether it is safer to use 20 panels and the output will be 901V at a temperature of -15.
There is no problem regarding the operating voltage, we are within the range, but the open circuit voltage in frosty weather is probably a bit too high or on the limit. And then the question is how it relates to 6200W per MPPT, and if it exceeds it, it will disconnect or cut off.

There have never been any problems with the voltage, always 229-232V, but today the sun and the network increase even to 247-248V. At what voltage will the 8.8 KTL-X disconnect? Is there any option to change it to withstand higher voltage or does it disconnect so as not to be damaged? The high voltage in the network is probably not its fault, when it produces 7-8 kW, the consumption at home is e.g. 12 kW while charging the car and the voltage is still so high

Witam wszystkich, pacjent sofar 15 g3, podczas aktualizacji błąd arm, sprzęt padł błąd SCIcomLose, próbuję ponownie zainstalować oprogramowanie ale nie ładuje jak wcześniej plików tylko pisze aktualizacja i po chwili falownik ponownie się uruchamia, gdy wrzucę na USB inne oprogramowanie wybieram aktualizacja to przeleci że błędne pliki ale jest jakiś proces, a niby odpowiednie jakby się zawiesza? Może ktoś miał podobną sytuację i wie jak z tego wyjść? Pozdrawiam Michał

Здравствуйте. Помогите с настройками, инвертор Sofar 8.8KTLX-G3 Отключается при 195 вольт, хочу сделать, чтобы работал от 190 вольт. Где в настройках можно поменять этот параметр? И вообще можно ли такое сделать? Спасибо большое.

Hello, I have a 40ktlx-g3 inverter, how many panels should I give for one string of JAM66S30-505/MR_BF panels?
Or is there someone here who could draw me a diagram.

maiki00 wrote:

Hello everyone, patient so far 15 g3, during the update there was an arm error, the hardware got a SCIComLose error, I`m trying to reinstall the software but it doesn`t load the files as before, it just writes update and after a while the inverter restarts, when I put another software on the USB I select update and it will pass. incorrect files but there is some process and it seems to be crashing? Maybe someone had a similar situation and knows how to get out of it? Regards, Michał

Hello,
I join the question.
I have an 8.8 KTLX-G3 Inverter (Hardware Version V001, Software ARM V000005, DSPM V000000, DSPS V000000) and I decided to update the software to the latest version because of the multitude of new options compared to those currently available on my inverter.
I downloaded the update files from the official Sofar website (sofarsolar.com) and performed the update according to the instructions.
An ARM error occurred during the update and the device was reset after a while. After loading, the SCICommLose error was displayed on the screen.
Subsequent attempts to update or turn it off for at least 5 minutes do not bring any positive effect. After turning on, the inverter displays an error and that`s it.
Unfortunately, the website has not yet responded to my inquiry.
Has anyone had this problem and managed to solve it?

leave only the arm and safety files and run the installation like this

Thanks a lot.
I did as you wrote and the inverter came back to life.

Hello,

I have an inverter sofar ktlx 5.5, set with jumpers to 6.5. I have one string of panels 6.5kW. And I noticed that after connecting to one input I only have 2,8kW of generated power. I understand that I need to connect both inputs on the inverter and set up parallel operation.
But since the inverter is set to 6.5kW, why does it cut at 2.8 and not have 3.2?

Greetings

Good afternoon,
I have a question. Does the new software for the inverter 6.6KTLX-G3 introduce a change which gives the possibility of enabling active power curve adjustment in the options? (Reactive power curve adjustment)?

The Fox inverter has something like this which, in the event of a voltage surge in the mains, allows continuous current production at a reduced value (cuts production e.g. from 3.5kW to 2.0kW) and thus does not switch off.

I have such a problem that my inverter at high voltages in the network simply gives an error GRID OVP and shuts down, so at that time does not produce energy....
One installation on Fox (4.5kWp) produces up to 25kW per day and the other 5.35kWp on Sofar only does 16kW under the same lighting conditions.... which is a big loss.

How can this be remedied? .

@kolavb You need to run the P(U) function on G3. This can be done with the instructions on priv.

for me it then looks like in the attached screenshots around hr. 11 . .

You can also send me please.

LordZiemniak wrote:

You can also send me please

I join the request.

shogun wrote:

@kolavb You need to run the P(U) function on G3. This can be done with instructions on priv.

If you can, I will also ask for instructions.

Yesterday I noticed that in both the mobile app and the Solarman website, even after downloading the inverter log in Excel, there is no temperature value given. Up until about a week ago, all three of these "sites" were displaying two values from the temp sensors.
Can you check with yourselves if you still have the temp displayed?
At my Sofar Solar 8.8 ktlx g3.

temperature tab has evaporated
I checked on a dozen installations and this temperature tab is not there

Holy crap. Exactly, there is no whole tab with the temp. And on the page, when you type in the settings to display in the graph also no, I think it used to be called Single plate temperature.
But you reassured me that this is not only my problem.

Btw, could you also send me instructions on how to enable this function in the menu when the voltage is too high?

On my 8.8 KTL-X the Solarman website normally displays the temperature

Today, it doesn't even display reactive power, in fact half the data has disappeared.

With me it normally shows the temperature further down, the graph is just as available
.

Which inverter and software version?

>>21071913 I will also ask for this instruction

I confirm, appropriate setting of this p(u) in my case does the job voltage as it was is too high, but the inverter works, fact with less power but it works the difference is significant in production, the only thing left for me is to torment Tauron to bring it to order.

Did you activate this function yourself or did Sofar's service enable you remotely?

I figured it out myself

What inverter do you have?

Hello
Sofar Solar 5.5KTL-X 3-phase inverter
JA SOLAR 420 JAM54S30-HC GR BF 420W panels 13 pieces

1 -STRING 7 panels 31.80Vx7=222.7V (2.94KW)
2 -STRING 6 panels 31.80Vx6=190.8V (2.52KW)
Open circuit voltage (Voc) 37,58V
Max. power voltage (Vmp) 31.80V

Biggest sun at 11-13 I give 4.2KW, shouldn't it be 5KW? Maybe convert to 1 String?
Ground mounted photovoltaic on a rack

I would be grateful for an answer

@dark1309
[letter:4807666891] 1. Catalogued minimum DC input voltage for max power from mppt is 240V, so you have too low string voltages, which can probably reduce the power extracted from the panels by some percentage.
2. In panels you have about 5.4kWp according to STC, which means in practice in the middle of summer some 4.5...4.9kW in real life, depending on weather conditions.When you add up one with the other these 4.2kW seem to be justified.

I would try a one string connection to start with, if possible. Optimal inverter operating conditions are specified for a string voltage of 650V

It is possible to pin on 1 String. Thanks for the answer.