Huawei SUN2000 Inverter: WIFI Dongle Connection, Firmware Update & FusionSolar

webonek wrote:

The voltage on the panels (I see this with the optimisers) seems(?) correct to me: about 32-33 V as the sun shines for 375 W and about 2 V less for 325 W. The maximum current is around 9 and 8 A respectively. So what conclusion...?

[letter:3d76cd34b0]33V x 9A = 297W --> 0.79% power according to STC

31V x 8A = 248W --> 0.76% power according to STCLike a bit by the small side, especially that string from the 325W panels. Unless you've just caught such lousy days. In a sunny summer the panels should give like 85...90% power according to STC.

webonek wrote:

But that's how the 5 kW worked - the same Huawei model: with a 6.1 kWp installation, it gave quite a long peak of 5.5 kW.

It's just like here - that is, around to 90% power according to STC.

webonek wrote:

After rewiring the inverter itself to 8 kW, 6 kW production appeared.

And this is already slightly suspicious.

webonek wrote:

And now exactly the same string (because it has remained the same) on a different inverter doesn't even do 5 kW, but some 4.7 kW. And the power of the panels is more than 30% higher.

And maybe this is some problem with the optimisers?

webonek wrote:

To this, Huawei support itself claimed at the upgrade that, and I quote: "with a 10 kWp installation, an 8 kW inverter will have a peak of 8.8 kW".

Well, it looks like they know what they're talking about.

>>21210027 .
Well, that's it - a bit low .
I have Huawei optimisers - some P and some newer P2. Huawei says it doesn't matter - they just recommended uploading the same soft, which was done (and MBUS).
I have uploaded the old soft ...153 - but tentatively I can see that this has not changed anything.
At the moment - it's full sun, basically starting the hours of peak (at my place) production, as the panels are on the south-east side (peak between about 9:30-12:00) and I can see on the optimisers (they hardly cut anything) that:
1) String PV1 325W 31.6V*7.41A=~235W
2) String PV2 375W 32.6V*8.51A=~279W
....no and just: A little low .
Total production around 7.7 kW and the graph is already flattening out.
Cloudless, temp. in the shade 22'C. Temp. inside the inverter 55'C (with vent).

P.S. And why is the 6 kW after rewiring the PV1 string to the new inverter suspect? ...That it was too much? But it was, I remember exactly, because I was surprised.

webonek wrote:

At the moment - it's full sun, essentially starting the hours of highest (with me) production as the panels are on the south-east side (peak between about 9:30-12:00) and I can see on the optimisers (they hardly cut anything) that:
1) String PV1 325W 31.6V*7.41A=~235W
2) String PV2 375W 32.6V*8.51A=~279W
....no and just: A bit low

.
Yes, seventy-something percent. A bit low if you actually had full sun and clear, transparent skies. This time both strings generate almost the same, unlike previous observations. This would have to be independently verified.

Because for this configuration, if you look in the calculator, the powers generated from the panels at the end of August average around 0.5...0.85% STC, depending on the weather conditions.

Let's say there would be a shortfall of some 10% yield. The question is whether the main limitation of the generated power could be the voltages or the current from the panels.

What types of panels do you have exactly?

webonek wrote:

And why are those 6 kW after rewiring the PV1 stringer to the new inverter suspect? ...That it was too much? But it was, I remember exactly, because I was surprised.

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Well, because how can such an increase in production occur when changing the inverter?

Some minor differences may of course occur due to the possibility of different mpp tracers, But a little and not so much.
Possible tracer failure in the inverter giving less power.

As you yourself wrote:
" the same Huawei model: on a 6.1 kWp installation it gave a fairly long peak of 5.5 kW. After rewiring the inverter itself to 8 kW, 6 kW production appeared. ", which would mean continuous sunlight on the panels at around 98% over STC. Possible short term ('minutes'), but somewhat unlikely in the long term.

>>21210830
JAM60S17-325-MR-FB
JAM60S21-375-MR-FB

As for those 6.1 kWp on the 5 kW inverter (6.120 to 6.220 kWp to be precise) - that observation was brief. Because a while later, when we (the team) confirmed that it was "working", they switched off and took to connecting PV2.
Nevertheless - if I do the same thing now, i.e. disconnect this PV2 and plug in PV1 alone, I have the production as it is now - i.e. about 30% lower. On the other one plugged in alone - just as lower.

And why, for heaven's sake, why was a 5 kW inverter on the same 6.1 PV1 making 5.5 kW in the long peak, and now with 8 kW and an even more oversized installation (by some 20-30%) it has a problem with even 8 kW, not to mention the 8.8 kW peak? Even Huawei support itself claimed and claims that "there should be an 8.8 kW peak".

webonek wrote:

JAM60S17-325-MR-FB
JAM60S21-375-MR-FB

It all revolves around what might be due to the lighting and operating conditions of the panels. Too small of a difference to deduce anything concrete - or so I would say. Similarly to the service.

Note that the voltages are almost exactly in line with those of the NOCT specification, which is the one close to real conditions (mainly cell temperature).
Imp, on the other hand, are a tad (a few percent) lower than those of the specification.

In summary - either everything is OK and you have these weather and module operating conditions or you have some minor problems on the panels limiting the operating currents slightly. Maybe on the ones added to the old strings.

Since you have optimisers that would mean you have some shading? Are they actually needed?

>>21210874 .
And what can you have in mind, any examples, when writing about "minor problems on the panels"? In the sense of panels some faulty or cable bad or something else...?
I have the optimisers mainly because of the chimney, which, once production drops and the sun goes to the south side only, I have a wandering chimney shadow there. But this has been after the peak for a long time - whether it was there or now as it is gone.
In the current conditions I have no shadow at all until midday, except possibly a natural one like a cloud.

For the record, let me repeat: On the old thong I added NOTHING. It is what it was. And therein lies the problem and my complete surprise - that it was running 1-2 hours on a peak of 5.5 kW, and now maxes out at about 4.7, even though it's a string of over 6 kW .

webonek wrote:

For the record, I will repeat: I added NOTHING to the old string. It is what it was. And that's the problem and my complete surprise - that it was running 1-2 hours on a 5.5 kW peak, and now it maxes out at about 4.7, even though it's a string of over 6 kW

.
But what do you expect? That a 6kWp string will now produce 6kW???? The sun at its highest point was 22 June. In a little while it will be September 1. We have a heat wave in Poland. Cloud cover, wind, panel temperature, air temperature, sunshine. All this has an impact on production. It will not be equal to the output of the panels. Maybe there is no problem in the panels and the low production is simply a consequence of the coming autumn.

>>21210917 .
I expect a peak of 8.8 kW to be produced from the whole installation - I have written about this many times before. As assured by Huawei and as - similarly oversized installation - was previously on a 5 kW inverter. I recommend reading my earlier posts.
I still don't know why you are writing about "panel power" while I am pointing to a much smaller value of 8.8.
I haven't had a peak since July, which is when I switched to the new inverter, and there was no "coming autumn" then.

Autumn but more crazy temperatures. I have power panels under 6 kWp, a Growatt 4000 inverter (with a peak power of 4100W) but the cut-off I saw was either in April-May when it was colder, or in check weather - frequent clouds - the panels had time to cool down. In July and especially August, it was rare to reach 4 kW at all, despite the continuous lamp. A friend has a SUNa 10 kW and he saw the cut-offs when he increased the panels to over 13 kW (at my place the panels are too flat - such a roof - and when the angle is optimal it's too hot, when it's cooler the angle is too small, and so on and so forth, at his place the panels are ideally positioned on the frame, but in summer there's also no madness).

Well, you see - in percentage terms I too have oversized by about 30%: analogous to 10/13 kW, only I have an 8 kW inverter 30% more panels. And that's exactly what I mean. We had winds in July, so the panels cooled down and the peak was 5.5 kW. It stopped - despite the same weather - after putting on the 8 kW inverter.

By the way: in the FusionSolar web panel there is an item "configure strings": you can enter the exact parameters of the panels in each string - voltages, short-circuit currents, degradation etc. Huawei claims that you can enter or not, but this has no bearing on the operation of the inverter. So what is this for...?

But buddy, the technical documentation is available even in Polish - instead of referring to unverifiable by us alleged information from huawei support (because maybe you misunderstood something or the support engineer had a bad day) provide a link to the specification in which the maximum peak power is given. I only see in the documentation the maximum apparent power for such 8800VA inverters.
Besides, by definition, peak is a short period of time, up to a few seconds, after which the power drops to the rated power - whether there is any point in discussing such an issue and fighting over the trace amounts of energy that can be obtained.

Perhaps you yourself have misunderstood and this is a prelude to passing this habit on to others? I do not know. I, on the other hand, have it confirmed. Repeatedly and in various ways. Just because you - allegedly - wrote such a post doesn't mean it's so: usurping a seat in another person's head is out of place here. And certainly not professional in the slightest.
However, these are not "trace" amounts of energy on a monthly or yearly basis: since the installation has been enlarged by 70%, I do not consider the production of electricity by only 8-10% more to be the norm.
However, I would recommend the colleague to contribute in other threads: it seems that here, on the colleague's part, the substance of the issue has been exhausted: perhaps the colleague has.... misunderstood. .

I am still asking for a link to the technical documentation of the inverter with such information and not for "one woman told another woman" conjectures.
Furthermore, a colleague asked what the optimisers were used for and you did not reply.
If you want to help, answer the questions related to the topic and not act as if you know everything.
As far as the thread is concerned, you are not its author and you are not the one who is going to throw participants out of the discussion.

>>21211160 .
Buddy, you don't have to answer - because you can't read: the posts about optimisers were. You didn't read, but - again - you draw the wrong conclusions. I have always admired those who "know everything", in addition "the best". Then I observed how others - by employing such people - lost their money. Officially: thank you for your willingness - but willingness alone is not enough to solve a problem.
And - again - some misconception: I am not throwing anyone out. However, I don't have a shred of respect for someone who pretends to "know everything". - while, like an offended child, projecting this fact onto others. That used to be called turning the cat on its head.
And work on your nerves - if you'd read calmly, you wouldn't be writing such false information: about what I wrote and what I didn't.
Also, Struclu - bye! .

P.S. And if you continue to hold back from (mis)responding to my posts, please allow me the courtesy of not responding to your posts (read: taunts). I always feel strongly intimidated by such "all-knowing" people displaying prophetic abilities - I am a simple engineer.

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>>21211038 .
I have about 5.6kWp of panels and a 4kW Huawei inverter. And check this out:
1 September, air temp 22 degrees:
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29 August, air temp 32 deg:
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30 August, air temp 33.5 deg:
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And a comparison with this year's record daily production of 23 June:
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I don't have the highest daily air temperature from that day, but the daily average was 21, compared to 26.5 on 30 August. So it must have been quite a lot cooler in June after all.
You can clearly see the difference in maximum power, also the heat affects the power of the panels a lot. It still depends on the setting, I have an east facing one. To the south they will heat up more.

>>21212300 .
Well that's right - on the graph from 1 September the inverter is doing 110% of rated power. It was like that on a 5 kW inverter at my place too.
And at my place it doesn't hit rated power or it hits it for a while, not to mention peak - even when the weather is exactly like this: 21'C, cool wind and full sun.
I also have an east-facing - more precisely: south-east-facing.

I'm not arguing that I don't have an 8.8 peak in hot weather or every day in summer - just that I don't have one at all, except for really short, very short spikes after the sun comes out from behind the clouds. And the kind of longer peak above rated power on a cool, sunny day (above 4 kW with you and above 5 kW with me on the old inverter) - I haven't had at all since nearly 2 months after I changed to an 8 kW inverter.

I've added another graph, from June, there's a lovely peak there.
That's what I'm thinking, maybe it's a panel issue. You have the black ones, I have the classic 'blue' Longi LR4-72HPH 435M. Maybe yours get hotter and drop in power more?

>>21212318 .
Rather not, because on the old 5 kW PV1 string inverter, which remained unchanged - it did 5.5 kW in peak and for quite a long time. And now the same string does a max of about 4.7 kW. .

>>21210894
Do I understand correctly: you have panels installed in the shade and you expect that in hot weather (which the panels do not like) they will produce at full power? and the panels are used - because the panels in the first months of use lose most of their efficiency?

You wrote that you have had this installation for 3 years. Have you looked at the historical graphs? Actually, I don't know if you have access to them after replacing the inverter.
Did you check what voltage and current you had on the string then and what it looks like now? Because the question is: did the voltage and current on the string drop or just the voltage, for example?
At my place from the heat the current drops by about 10% and the voltage by 5-6% max.

>>21212333 .
here is no "at me" . The temperature coefficient is on each panel card and can be checked.

please tell me which panel you have, out of curiosity - I have not yet met a panel whose current would drop in hot weather - normally the current rises

>>21212318 .

mateos2 - And where did you get the information that "panels in the shade"? I was only writing about the chimney, which gives shade in the afternoon, where production is already low always. Already the second person, who responding to my post makes something up, does not read or read not my posts and refers to me? I do not have panels "in the shade" apart from the described irrelevant exception. .
And did you read what I wrote in my last post - that I was referring to the lack of peak in cold weather? Because clearly you didn't. Do you want to help? Then read with care and understanding what the problem is in the first place. And not in a vague way.

speedy9 - I don't have all the data anymore. I have some in screenshots, one of which I posted here: just in the summer heat it was doing a peak long of 5.5 kW and production was max. up to 42 kWh/day, and now I have max. 51 kWh for almost 2 months. So an installation about 70% more powerful, and barely about 20% more electricity. Very strange in my opinion.
According to the specifications of the panels should drop from heat max. 10-15% - and with me the power of the individual panels drops by nearly 30%. I have written about this before.
As for the drops - the harder the sun shines, the more the voltage drops and the current rises. As the sun goes down, the current drops and the voltage rises.
JAM60S17-325-MR-FB
JAM60S21-375-MR-FB

>>21212355 .
if you at least showed the graphs of the MPPT on sunny days, it would help something
or do a full optimisation then you can see what is happening per panel

maybe you have a shadow, maybe you bought defective panels, maybe your inverter is set to power factor 0.6 or to reactive power factor correction.
in general, your installer should be able to sort it out.

I have no restrictions on the inverter - checked many times, including by Huawei support.
It's not likely to be faulty panels, as they would have to be faulty on both PV1 and PV2. This is rather impossible - and both stringers produce with a similar "loss" of power.
Chart are you referring to the usual production chart or a different one?
What do you mean by "fully optimised" and that "you can see every panel"? I only see the ones with optimisers in the web panel.
The installer says everything is ok from his side, and I don't really know what would be wrong either, since there is an identical problem on both strings.

>>21212405 .

Current and voltage graph for each MPPT
something like this :
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Hey @webonek,

looking at what you write I would focus on the inverter. I read from your first post that it is used. I would do a factory reset and reconfigure it in the EN50549-PL standard (I am writing about it because it was not present in the inverter configurations on old software before and also installers like to set Czech or German standard). Here, it is worth noting the options that can actually affect production: Reactive power compensation, active power compensation, maximum active power, voltage rise suppression. I have limited confidence in H support and installers.

The firmware versions of the inverters themselves did not significantly affect production. There used to be one I think 143 (?) I wrote on the forum earlier but it's old times. I do the updates on a regular basis and see no significant deviations.

xszuflax wrote:

I have limited confidence in HW support

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HW support is really good, but they don't go into detail to explain or correct the work of the installers.
They make sure the hardware works properly.

the settings are also a good clue - the HV threshold limit may have been set at 260V and now it is 253V - but it is after the I/V diagrams on the mppt that something will become apparent (refraction)

>>21212443 .
I've been keeping an eye on the standard for what they set and it's the right one - but I checked to be sure anyway.
This graph is where can I find it? Because I have various but rather power only ones?

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>>21212459 .

Hey,

In a similar section Reactive power control. See if you don't have compensation there. Looking at your posts I haven't seen any problems with the line voltage but it's still worth checking.

webonek wrote:

This chart is where I can find it?

https://eu5.fusionsolar.huawei.com/