After selecting the modules, you can calculate the parameters not to exceed 1000 V, but two strings of 5.5 each are 11 kW installed and a factor of 0.7
For starters, I wanted to leave the second string empty and be able to expand the installation. On the net, they write differently about the use of only one string. In the case of Sofar there will be no problems with that? BTW. Are modbus registers available for ktl-x somewhere?
In the initial sofara instructions, the power was shared between the inputs, currently there is no sharing, so all power can be connected to one of the inputs.
The power of the 11ktlx inverter for AC is 10 kW and of course you can connect 11 and oversize by up to 20% depending on the direction of the modules, but for the power industry, the power of the modules counts and you will fall into a 30% discount and then you will leave the power industry more than you will produce from this 1
Hello, Gentlemen, tell me from experience how Sofar inverters perform? Because I have a valuation for SOFAR 5.5KTL-X 5kW 2 MPPT 3-phase + 10pcs of 500 Wp Risen Energy panels, my annual consumption is about 4150kW. My roof is on the south-west side, metal roof tiles. What does the servicing of this type of solutions look like? if something breaks in the inverter, how does it look from the warranty side? do you have any experience I apologize in advance for such silly questions
Hello, Gentlemen, tell me from experience how Sofar inverters perform? ... What does the servicing of this type of solutions look like? if something breaks in the inverter, what does it look like on the warranty side? do you have any experience I apologize in advance for such silly questions
Apparently there are no stupid questions ...
I have a SOFAR 8.8KTL-X and 26 315Wp panels from 21/10/2019 and a 15-year warranty for it (I paid extra). Except for problems (almost 9 months) with overvoltage per transformer (it was 248-252 VAC "according to the standard") I have no problems. I mean, now I do not have it, after setting the strip, it was transformed to 230 V. One could write a book ...
So I already know that I need to talk to an energy friend first to check my tension thank you valuable note !
A friend has a meter? Lucky ... Can't you measure anything yourself? It does not have to be a measurement class. Check in advance and don't save money on the cable connecting the installation with the switchgear. The voltage drop on it at the maximum power of the inverter should not be more than 1%. If you know how many meters it will be, give it and I will calculate the minimum cross-section.
And if you already have such a friend, let him better measure the loop impedance. This can be a key parameter and even more important, because without the option to change in real life. With your power (5-6kW) it can be successful, but it doesn't have to be. What's your power supply? I mean where do you live - city / village / island?
Added after 8 [minutes]:
SilverX wrote:
... BTW. Are modbus registers available for ktl-x somewhere?
The voltage in the sockets is 228-233V, although from half a year ago I remember that it was about 235-245V. But I meant that he should check what is correctly positioned as possible because I don't know myself and as for the loop impedance, what are the standards? Because when I ask him, I need to know what it should be like I don't know what to write on "What's your power supply?" I live in the countryside
... although from half a year ago I remember that it was about 235-245V.
... worse, but not tragic.
witek1646 wrote:
... and as for the loop impedance, what are the standards ...?
The standard is one and Polish, but they, i.e. the local DSO, don't care ... They are mainly and only interested in their own interest, i.e. the transmission and the associated profits and the maximum no problems at the lowest cost, and when it comes to someone else's. The frequent overestimation of the phase voltages gives them considerable savings. Classic conflict of interest. Unfortunately, the stronger ... or the more annoying wins and persistent. :spoko:
witek1646 wrote:
... Because when I ask him, I need to know what it should be like I don't know what to write on "What's your power supply?" I live in the countryside
Since it's a village, you probably (like me) have an overhead line from the old days. The impedance is better the smaller. For example, I have 0.625 ohms at 350 meters from the transformer. And that's OK, but when it's bigger, you have bigger voltage drop (or inverter gain) during the consumption (return) of energy. Such a simplified Ohm's law. Exactly more complicated, because it is an alternating current and the line capacitance comes, but more or less the point is that if some current flows, it is on the line you have different voltage at the beginning (source) and end (receiver). While it is almost a piece of cake when collecting because at most the old bulbs shine weaker and the engines are weaker, we have a problem the other way, if the voltage boost by the inverter exceeds the magic 253 VAC. Then you have something you definitely won't want to have. Problems with PV installation. The inverter is "smart" and you obey your mom, which is the standard, and she ends (and doesn't start) at 253 volts each phase. For me, the day started from 254-255 V which gave flowers like in the picture. The inverter kept going into alert mode (Grid_OVP = grid voltage too high) and shut down for 3 minutes. Then 30-60 seconds of sampling and if the voltage was (seemingly) OK, i.e.
Thank you for such a lesson, I have to find out exactly what my line looks like and where is the nearest luck, because I don't even know As for the length of the cable between the inverter and the switchboard, it will be max 2-3m because on the same wall I want it to be mounted only so that it does not interfere. Unless I misunderstood and you mean the "zetke" where the meter is, because it is outside the building and it is about 50m. The result in the voltage drop must oscillate around 0.70%, yes?
Thank you for this lesson, I need to find out exactly what my line looks like ... The result in the voltage drop must oscillate around 0.70%, yes?
The voltage drop should be as low as possible, but this applies to the entire line up to the trafo. Unfortunately, you can only influence the meter (without problems) and possibly the connection to the line. You will not do anything else because it is the OSD domain. Therefore, start by measuring the fault loop and checking the 50m to the meter.
What you will wear now is a negligible 2-3 meters, 5x4 mm 2 Cu is enough. But be sure to check these 50 meters, because you can change it for the better. Did you have any renovation of your installation when? Theoretically, you can also change the connection and it would be good to install a new (insulated) if you have something on bare wires for glass insulators.
The house is quite new, built in 2017. These 50m cables are 5x10mm2
In the connection conditions, I connect a transformer station, but there are probably no officially given parameters anywhere, so I will have to find out what and how.
That's cool. You don't have to worry about anything other than clouds and OSD conditions. :D
Seriously, your only problem is the loop impedance to the transformer and voltage in the network. In my case, at 8 kW, the voltage jumps by +7 V for a loop impedance of 0.625 and a bit above 1% on the cable from the switchgear to the inverter. In your case it should be less because you have less power (for now). With this tension, there should be no great stairs, if only several neighbors will not copy your invention from the roof.
Hello. Colleagues, "auxiliary voltage error" appeared on the Sofar 6.6 kW inverter. What is this error? The installation produced about 2kW at that time and there was a peak to 6.07 kWp and this error occurred. After a few minutes the peak dropped to the value still about 2 kW and everything returned to normal. I turned off the voltage from the panels for 5 minutes as recommended in the manual, but after everything returned to normal. Installation of 6.3kWp. Kisses Darek
I had the same thing yesterday in the morning as the inverter started. It seems to me that these are not permanent errors and since it has disappeared and does not reappear, I would not care.
It is the same for me every now and then in the morning there is nothing to worry about, this is the norm, the error disappears by itself and the inverter works normally. Software version V2.40 of these errors are absent.
I am going to be a user of sofar 3300tl-G3 and I want to ask if it will be necessary to set country and language parameters. An inverter purchased from Corab has the software V 2.70 on the plate and next to it the number 12. Another question concerns grounding. I made the grounding from the hoop to a depth of 6m, connected to the inverter housing and varistors. Should this earth electrode be combined with a home installation?
If anyone is interested, there is already a new version of the inverters marked G3. The appearance of Huwejowska - modern, the big screen has disappeared, the power after DC a little more, online update - Link Remote software update - home software will no longer be loaded.
I am going to be a user of sofar 3300tl-G3 and I want to ask if it will be necessary to set country and language parameters. An inverter purchased from Corab has the software V 2.70 on the plate and next to it the number 12. Another question concerns grounding. I made the grounding from the hoop to a depth of 6m, connected to the inverter housing and varistors. Should this earth electrode be combined with a home installation?
12 may mean the country as Poland, in terms of the applicable regulations for connection to the power grid 2.70 is probably the most new soft, the inverter can already be set to Polish, although the setting at the first start is not a problem if you have a PE wire from the home installation, or rather yes, you should connect all earthing together
if you have a PE wire from the home installation, or rather yes, you should connect all earthing together
Thanks for the answer. Yes, I connected it, but I wanted to make sure.
The inverter was running, the language was English so I started setting it up. 4.Set Country point requested a password and .... success! There are no country settings. This number 12 on the software probably means it. I think so. Point 10. Set Languae- hello and there are languages first, of course, Chinese, timidly press the button ... and they change. I saw Polish success and I don't think I will go back to point 4. Maybe I'm wrong.
if you have a PE wire from the home installation, or rather yes, you should connect all earthing together
Thanks for the answer. Yes, I connected it, but I wanted to make sure.
The inverter was running, the language was English so I started setting it up. 4.Set Country point requested a password and .... success! There are no country settings. This number 12 on the software probably means it. I think so. Point 10. Set Languae- hello and there are languages first, of course, Chinese, timidly press the button ... and they change. I saw Polish success and I don't think I will go back to point 4. Maybe I'm wrong.
Point 4.Set Country is the country setting and there should be country codes for selection, eg 00- Germany VDE AR-N4105. 12- Poland. 24- Cyprus. 01- CEI 0-21 Internal 13 Germany BDEW. 25- India
This is in the manual and I wanted to do it, but after entering the password we see success and the window closes. The inverter is from November and it seems to be permanently entered 12.
In point 3. I confirmed the info in item 5 is Poland.
So I will not change the tension from another country. They block it because after changing the country it enters the Chinese characters - bushes.
Nie jestem elektrykiem ale tu chodzi raczej o upływy/uszkodzenia izolacji generatora PV i przebicie do masy/uizemienia- Link
The inverter detects the voltages of PV+ and PV– to ground and calculates the resistance of PV+ and PV – to ground. If the resistance of either side is lower than the threshold, the inverter stops working and reports an alarm indicating that the PV insulation impedance is low. Low insulation resistance is a common fault in the PV system. The insulation layer of the PV module or DC cable deteriorates due to the damage of the connector. When the DC cable passes through the cable tray, the insulation layer of the cable may be damaged because the metal cable tray may have a barbed edge, the power leakage to the ground occurs.
and persistent. 
thank you valuable note 
