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

Hello,
I have another trial with the SUN2000. The inverter is running, the firmware update and commissioning of the device was successful, but I can not connect to the network using the WIFI Dongle, the key is turned on and blinks red, i.e. as if it was necessary to configure it, but as in FusionSolar I enter quick settings then shows SDongleA is offline. I've tried both Android and iOS, it's always the same.

Bob271 wrote:

Hello,
I have another trial with the SUN2000. The inverter is running, the firmware update and commissioning of the device was successful, but I can not connect to the network using the WIFI Dongle, the key is turned on and blinks red, i.e. as if it was necessary to configure it, but as in FusionSolar I enter quick settings then shows SDongleA is offline. I've tried both Android and iOS, it's always the same.

Did you do this at FusionSolar? Because home does not always see, possibly SUN2000

Yes, I have done with FusionSolar in different ways from different devices. Eventually I gave up on Wi-Fi and connected the key with a cable directly to the router and it went. I have a few more questions
Do you use the FusionSolar website for PC operation?
Which network should I choose? The default is Germany-VDE-AR-N-4105, but on some Polish film on YT I also saw a suggestion to set up the Czech network.
There is something like "MPPT multi-peak scanning" in the settings, by default the parameter is turned off. What is this?
Should the other settings be left as they are by default?

Set the German network and default parameters for this network.

Ok, I did.
Another question about MPPT. I have panels connected to two MPPT inputs, a shadow from the chimney falls on several panels during a sunny day. All shadowed ones are connected to the same MPPT. Will switching on the "MPPT multi peak scanning" parameter do something?
How much maximum can an installation composed of panels, which together give 10 kW, can produce at any given time? Because probably 10kW will not be produced.

Subtract the temperature coefficient and consider the optimal lighting conditions for your location. On a monthly basis, 10kw will produce about 1.2Mwh

As I often mount Huawei:

DC - WE MUST HAVE !!!! Without DC power supply, the inverter will not be configured and commissioned correctly !! There will be frequent errors, strange situations, the inverter does not finish updating, etc.

My advice: as we know that we will finish laying the panels in the evening and make the configuration when it is dark - I do not wait until I have panels on the roof - I spread 6 panels of the ground flat and connect to the inverter, I have 15 m sections of the solar cable with MC4 made - I connect and start the inverter - I do the configuration and that's it. This method ensures that the inverter has DC power and the process will go smoothly.

Proven and always working procedure:

We turn on DC and AC
We are waiting for the inverter to start working - important !! - The default is German, so we have nothing to fear. After starting work, I always manage to do the configuration without any problem.
We start the inverter configuration using the FUSION SOLAR application !! Not Fusion Home or SUN 2000

Fusion SOLAR:
We must be connected to the internet to log in !!
After starting the configuration, we will be asked to turn on WIFI if we do not have it turned on.
Uploading the software takes about 10 minutes.
The SAM program tells you if and when to turn ON / OFF Wifi or cellular network
I advise you NOT to change the default WiFi password of the inverter - simple reason, Huawei sometimes has problems with the reset and the procedure has to be repeated many times. And if we forget the password, we may have a problem.

Inverter RESET:
The inverter MUST run for at least 3 minutes !!! before starting the procedure. In my experience, you should turn off AC and DC, wait 10 minutes, turn on AC and DC and wait about 10 minutes again, so that the inverter runs for more than 5 minutes. Then we proceed to the reset.

MONITORING:
Huawei's servers are overloaded, there are often problems and delays, and the whole thing is quite slow - now you know why FRONIUS costs so much - they simply invest more in soft and reliability. :)

Anyway - Huawei is a good inverter, I would not be afraid to install it in my apartment - but - they still need to refine the software a bit

The inverter started up without any problems, creating an account on FusionSolar and updating the software went smoothly. There were problems with the communication of the key via WIFI, the FusionSolar application did not see the key although it was plugged in and it seemed that everything was ok. Only after connecting the FTP cable to the router was it possible to connect the inverter to the Internet. I don't know what I was doing wrong, but since it works when connected with a cable, that's enough for me.

In the "String Capacity Configuration" tab, it is possible to enter a value for each PV input. By default, the whole is split evenly into 4 strings. If I have panels connected to two strings, should I divide the entire power of the panels into these two, and enter "0" in the remaining ones?

andrzej20001 wrote:

Subtract the temperature coefficient and consider the optimal lighting conditions for your location. On a monthly basis, 10kw will produce about 1.2Mwh

And how much the maximum can the installation produce? We currently have great weather, no clouds, the sun is shining, it seems that the conditions are perfect. The maximum production is about 70% of the power of the installed panels, it seems to me that it is not enough, taking into account the declaration of efficiency at the level of 98%? South facing roof, 30% slope.

At the moment, the panels are getting very hot - on a perfect day at the end of May, my installation is about 50 KWh now 40-43 KWh

noogi wrote:

At the moment, the panels are getting very hot - on a perfect day at the end of May, my installation is about 50 KWh now 40-43 KWh

At what total power of the panels?

SUN2000-6KTL-M0 inverter, power of panels - 6,750 KW

noogi wrote:

SUN2000-6KTL-M0 inverter, power of panels - 6,750 KW

It is less with me. Do you have 2 or 4 strings connected? What is the maximum instantaneous value of these 6,750 kW?

Massacre, up to 20 kW Huawei only has 2 mppt (two strings). The temperature is of great importance now. They work best on earth, you just need to read a bit and not be involved in the topic of installers.

All in one string.
If you have doubts about the configuration - check yourself at https://eu.smartdesign.huawei.com:31943/login/login.action?
After registration, you select your inverter and your panels (for mine I had to enter the parameters, because they were not in the database) and the program gives the correct configuration.
In my opinion, throwing darkened panels on a separate string makes sense, because the efficiency of the entire power plant on the roof does not sit down, but it is not known if the strings divided in such a way achieve the correct operating parameters.

woytas73 wrote:

Massacre, up to 20 kW Huawei only has 2 mppt (two strings). The temperature is of great importance now. They work best on earth, you just need to read a bit and not be involved in the topic of installers.

I do not really understand. I do not provide assistance, but I am looking for help in the thread regarding the type of devices I have to configure the system in the best possible way. What's wrong with that?

This read with understanding about the topic of the thread. Now we have a garbage can.

You are actually right. I didn't want to start a new thread but maybe you really need to do it

Moderated By Krzysztof Reszka:

Always assume your topic if you have nothing to add to the author's topic.

@ Bob271 my 9kw from mid February, 6700kwh studded, panel flat on the roof

The panels are connected to the PV1 and PV2 inputs in the inverter. PV3 and PV4 are free. On the FusionSolar page, the default power split is distributed evenly across all inputs. Due to the fact that the panels are physically connected to PV1 and PV2, can I divide the entire power into these two inputs and enter "0" for PV3 and PV4? How does this matter for the efficiency of the installation?

Added after 1 [minutes]:

andrzej20001 wrote:

@ Bob271 my 9kw from mid February, 6700kwh studded, panel flat on the roof

What is the maximum production your system currently shows you on a clear day?

Heated 6.5, like clouds after rain, it peaks to 10.5. There is nothing to hurt and think. Finally, it comes out as I wrote above. I'm happy

It is not about getting tired, but about checking whether the entire installation is working optimally, especially since there are various parameters in the configuration that can be set. After rain in a cloudy sky it gives more than in the sun?

Colleague @ andrzej20001 the point is that the temperature drops after the rain and when the sun comes out, the installation is 10.5 at times.

You have the so-called cloud edge effect. Full power is measured at 25st.c. The panel heats up strongly, especially black

How to solve the problem with communication with the inverter? I was not able to configure the WIFI connection (FusionSolar did not see the dongle during the commissioning of the inverter) After connecting the cable to the router, communication is OK, but once every few days the key disconnects and it is necessary to unplug the key from the inverter and reconnect it. The router and the entire LAN network at home are definitely working properly.

Try downloading and installing a dongle software update may help.

Can it be done? No visa anywhere for this option

Hi,
There is a way to remotely change the WiFi password? Because I can't find it anywhere.
For example, the customer collapses a router and buys a second one, at this point we have no communication with the inverter, because the SSID and password are different.
This can be done from the level of the app or website, or is there a customer visit each time?

I have not found anywhere to change the WiFi password remotely, the inverter has its own SSID and you need to connect to it to enter the settings, but you know about it.

I also have a question for you and others, smarter than me, you know maybe how to change the location of the installation, it shows me that it is in the Gulf of Guinea at the equator How to change the name of the currency to set the savings that the PV installation brings and how to change the power of the installed installation, I changed through the page, but in one place it shows correctly, in another it does not, it shows wrong on the app.

I will also write that after entering the inverter options, there is no possibility to change what I am writing about, the same from the web and mobile application level, a massacre, such an underdevelopment / oversight on the part of Huawei.
Unless I don't know / can't do something, then I'll apologize to Huawei .

Edit:
I coped with the location, after logging in to the fusionsolar website in the place where you can enter the installation address, it is not enough to enter the address that we use every day, you must accept the address hint, the address must be in the format that Huawei invented.

You name the new router like the old router and give it the old password.