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

lary504 wrote:

Although the g3 sofar is probably 13A, it will not exceed.

I just wrote about it , usually MPPT inputs are connected when there are two strings connected in parallel, then the current sums up and exceeds the allowable input current of the inverter.

Thank you for the quick answers, i.e. the panels in one string and one MPPT, probably the best solution, and the other MPPT will be for the expansion of the installation because I plan to do so.

If you thought about expansion, sofara 8.8 was better. You will not go crazy here anymore because it will cut production.

I thought to add 2 more panels.

That two panels are not enough for a string. If so, now make 2 strings with 7 panels each and then just add one to the string

And how much can I fasten so that it does not cut? For now, I will give you one string and if something is then I will divide it into 2 equal.

lary504 wrote:

If you connect the inputs in parallel, the current will be half the input. Although the g3 sofar is probably 13A, it will not exceed.

Exactly, the current is distributed over two inputs, moreover, many manufacturers recommend connecting both inputs despite connecting 1 string.

Added after 3 [minutes]:

caged wrote:

that is, panels in one string and one MPPT is probably the best solution, and the other MPPT will be for the expansion of the installation because I plan to do so.

No, one string and both MPPTs connected in parallel.

Added after 2 [minutes]:

caged wrote:

And how much can I fasten so that it does not cut? For now, I will give you one string and if something is then I will divide it into 2 equal.

6.6kW has a max MPPT of 850V, you already have almost 800, so only one panel can be added.
16 panels in two are not enough again. Then there will be only ~ 320V on 1 string, which will be on the border of 'full load' page 17 pdf.

Janusz_kk wrote:

6.6kW has a max MPPT of 850V

Maybe 1100V though, unless we are looking at different datasheets.

Janusz_kk wrote:

No, one string and both MPPTs connected in parallel.

You can justify it, one string is 6370 Wp / inverter 9000 Wp, panel voltage Voc 693 V / inverter input max 1100 V, starting voltage 160 V, voltage range 140 - 1000 V, nominal voltage 650 V, maximum panel power current 10.92 A / inverter input current 13 A, panel short-circuit current 11.66 A / inverter short-circuit current 18 A, even if he adds two panels, the current will not change anything, the voltage will be within the range, so why do you suggest MPPT bridging with one string?

rokbok wrote:

panel maximum power current 10.92 A / inverter input current 13 A, panel short-circuit current 11.66 A / inverter, short-circuit current 18 A,

Well, by this the max is 11A.
I have already given pdf a file before, and here it is about connecting


Added after 1 [minutes]:

rokbok wrote:

Maybe 1100V though, unless we are looking at different datasheets.

You are looking wrong, max input voltage is 1000V and MPPT is 850, in the second photo it shows.

Check the datasheet of the SOFAR 6.6KTLX-G3 inverter given by @caged, below I present the screenshot for the second time.

Janusz_kk You pass KTL-X to Sofar and he has KTL-X G3 and has 13A and 1100V

lary504 wrote:

Janusz_kk You pass KTL-X to Sofar and He has KTL-X G3 and has 13A and 1100V

Ok, I did not notice, which does not change the fact that the manufacturer recommends connecting MPPT in parallel as they are unused, which I gave in the second screenshot.

Added after 1 [minutes]:

And the full MPPT range is also 850V, as I can see, so it can still give max 15 panels in a string.

If he is going to add panels, I would do two strings at once and then just fasten it.

Here is a photo from the catalog card of what I got with the inverter

I read in the topic about the different versions of the software. Can someone tell me which one I have? Does this label show it?

After all, it writes to you, max 11A, 950V MPPT, as I read correctly from this poor photo.

Am I writing misunderstood? I am asking for the software version and you are reading the parameters here.
Maybe I'll ask otherwise. Where exactly is the software version information on the sofa?

binio1111 wrote:

Where exactly is the software version information on the sofa?

Probably somewhere on the menu, it was here somewhere at the beginning.

From the G3.00 sticker. And on the display in info.

Ok. Thanks. I was confused by this sticker because the thread mentioned the V versions ... and here is G.

Hello, I bought a Sofar 12KTL-X I need to change the overvoltage values. The instructions say you need to save a txt file to the card. The question is where to get that txt file

Gentlemen, sofar or foxes for 10x410W?

rustin wrote:

Gentlemen, so far or foxes for 10x410W?

Avoid Sofara. If something falls, you stay without equipment for a month.

Were there many such cases or was it just yours?

Sorry for the littering - post moved to a separate thread (cannot be canceled).

Hello everyone,

I am in front of the purchase of a photovoltaic installation. Roof slopes 41 degrees on 4 sides. Little space to the south via DHW solar panels and a swallow. Generally, the panels are planned to the east and west (with a slight curvature to the south). I am planning a hybrid installation with the UPS function (off-grid operation possible) with a later purchase of a battery.

From the many offers I received, I chose the 2 most comprehensively presented configurations:

COMPANY A (large - with twelve branches in major cities and "thousands of installations", it is said that it is to enter the stock exchange soon):
- 2 strings x 8 panels, power max. 6.56kW. Type SUNPRO POWER 410W SP410-108M (Uoc = 31.25V, Umpp = 37.33, but the calculated minimum voltage for 70 degrees C is 27.59V / panel which gives 220.72V for a string of 8 panels), warranty 30 years for efficiency> 83.5%
- HUAWEI SUN2000-6KTL-M0 or SOFAR HYD 6KTL-3PH inverter.

My analysis of the above-mentioned parameters and calculations shows that:
1. for both inverters the maximum current in strings is exceeded (the panels have a maximum of 13.41A, and the inverters have a maximum of 11A (SUN) and 12A (SOFAR)
2. for both offered inverters, the string voltage at the MPPT inputs of the inverter is too low to achieve the maximum power (220.72V) and 285V (SUN) or 320V is needed! (SOFAR)
3. The inverters are significantly scaled in terms of the power provided by the panels (practically the strings will work interchangeably), which I suppose will give the max power. from panels in the range of 3.3kW to 4.5kW.

COMPANY B (smaller, private, headquartered in one of the largest cities in eastern Poland):
- 2 strings x 6 panels - power max. 5.4kW. ML type ML-S6MF / T1-450-144 system - 450W (Uoc = 49.8V, Umpp = 41.00, the calculated minimum voltage for 70 degrees C is 43.97V / panel which gives 263.82V for a string of 6 panels), 25-year warranty for efficiency> 83%, product warranty: 12 years?!
- HUAWEI SUN2000-5KTL-M1 inverter.

My analysis of the above-mentioned parameters and calculations shows that:
1. for the inverter, the maximum current in strings is slightly exceeded (the panels have a maximum of 11.82A, and the inverter is max. 11A),
2. The inverter is significantly scaled in terms of the power supplied by the panels, analogous to the above case.
3. It amazes me to give a guarantee for efficiency twice as long as for the entire product? !!! (assuming that the "producer" does not collapse in the next year).

The above-mentioned proposals are the least shocking tip of the iceberg among other received offers, the substantive value of which is not even worth mentioning here.
Unfortunately, I have an electrical education with qualifications and I can still read and understand offers in related fields. But is no one in this country able to give a solid offer for fair (large) money (rhetorical question)?

Could I ask my colleagues for suggestions on the above-mentioned offers? In particular, as for the quality of the proposed components and what solution based on the above-mentioned information, my colleagues would recommend me for a price of around 25,000-30,000.
I would like to do it myself, but I do not have such a possibility, so I would use a solid offer from a trusted professional from the vicinity of Krakow.

regards
and thank you for any suggestions

Andrew
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ter12 wrote:

rustin wrote:

Gentlemen, sofar or foxes for 10x410W?

Avoid Sofara. If something falls, you stay without equipment for a month.

Even two .

kestutisU wrote:

The question is where to get this txt file

As far as I know it's from the inverter manufacturer.

Hello everyone. I have a Sofar 6.6 ktl-x. I unscrewed the screws on the front but can't remove the front cover. Are there any more hidden screws?
Thank you for your answer.

A lot of people have an inverter outside? Nothing is happening to him.

ic wrote:

Are there any more hidden screws?

There are gaskets that can stick a little bit and hold tighter than you may have tried.
Carefully try from one corner but "no tension".