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

Good morning, this is what appears to me on the Huawei inverter, plus 3 red LEDs.

>>21239828 reboot exactly as recommended - if it persists then replace with new ones

Hello,
I have a heartfelt request...
I have found some very helpful contributions from you regarding Huawei's SUN2000 series inverters, but I haven't quite found what I need.
I have this problem: in November 2021 a photovoltaic installation was set up at my place by a company that 1,5 years later went out of business. Unfortunately, I lost the ability to configure my inverter after the fact, and I lack MODBUS enabled for home automation. I have upgraded the FW of the SUN2000-5KTL-M1 inverter to the latest version V100R001C00SPC165 and SDongleA-05 to version V200R022C10SPC118 via FusionSolar on a smartphone (done one by one with intermediate versions). Unfortunately I can't get into the inverter settings in any way, because probably the installer changed the access password. I only have a user account which is elevated to the highest privileges for this account.
My questions are:
1. if I do the inverter password reset procedure as given on the Huawei support pages (the one with AC/DC on and off), will I lose any inverter configuration and will I be able to get to the installer settings after the reset?
2. after resetting the installer password, will I be able to get to the inverter configuration in any way and save it or at least read it (in case of W)?
3) Is there any way to migrate the account (or its settings) from the Fusionsolar web that I got from the installer to my account on FusionSolar (already with administrative rights)?
Best regards

1 You will only reset passwords. The settings will remain unchanged.
2) After resetting the passwords, you will be able to set new passwords the first time you log in and enter the settings.
3. if there is no contact with the installer then you need to contact Huawei support

pinelesss wrote:

Is there any possibility to migrate the account (or its settings) from the Fusionsolar web that I got from the installer, to my account on FusionSolar (already with administrative rights)?

.
You can migrate the installation to another installer account
Your account is the owner and I don't know if it will work

Sometimes even the installation gets lost when migrating to another installer and you have to manually

If anything, I can provide a technical document on how to migrate

cedrom wrote:

1. You will only reset passwords. The settings will remain unchanged.
2) After resetting the passwords you will be able to set new passwords the first time you log in and enter the settings.
3. If there is no contact with the installer then you need to contact Huawei support

.
Thank you very much for the information. Installer password reset, MODBUS set as required, communication with Home Assistant from this repository is working: https://github.com/wlcrs/huawei_solar
If anyone needs help with the integration into HA, please feel free to post

Added after 2 [minutes]: .

>>21283373 Thank you very much mateos2 for the information. I would very much appreciate the documentation. I would be grateful if you would send to prv or make it available.

I see that there is a new Luna2000 7/14/21 that has a limit of no longer 2 but 4 circuits connected together. From what I read it is compatible with my Sun2000-10KTL-M1 but according to the information I received from the vendor in the limit of two circuits per this inverter, and this is due to the single battery input (are you sure? I thought that all 4 are connected together and the last one to the inverter, but apparently not?).

Question for someone who knows about installation or has worked out unusual situations - is it possible to have two inverters within one installation and both with batteries connected? Sometime in the very distant future I will want to expand my 10KW with another 6-10 and the question is whether to just put a second one on and hook up two Luna's to both or remove the current dish and put one 15-20 which has two battery inputs and will handle 4 Luna's.

Good morning,

I recently set up a photovoltaic for myself and so am testing how it works.
Huawei SUN2000-3KTL-L1 inverter with LUNA 5kWh storage.
DDSU-666-H 1 phase meter.

I observe on a daily basis that I do not have full consumption and consumption information from the PV.
There are hours that the consumption information to the server is not transmitted, as can be seen in the graph below:
.


Is this normal and this type has it like this, or pay attention to something else?

>>21294303 .
Huawei has a limit of 2 DCdc devices per input.
10ktl has one input so max 2 DCdc each max 3 batteries
You cannot mix DCdc types on one input - they must be the same

There can be up to three inverters with batteries connected in one installation
You can also change to the mb0 series and connect 2*2*3 batteries because it has 4 inputs

salo5 wrote:

Good afternoon,

I have recently set up a photovoltaic for myself and so am testing how it works.
Huawei SUN2000-3KTL-L1 inverter with LUNA 5kWh storage.
DDSU-666-H 1 phase meter.

I observe on a daily basis that I do not have full consumption and consumption information from the PV.
There are hours that the consumption information to the server is not transmitted, as can be seen in the graph below:

.


Is this normal and this type has it like this, or pay attention to something else?

Interruptions in internet connection. Wifi at the limit of range.

>>21416121 .
Huawei sends the missing data as soon as coverage returns
Unless the coverage is mega-poor and bigger data doesn't get through

salo5 wrote:

Is this normal and this type has it like this, or pay attention to something else?

.
Have you checked what wifi connection you have --> Link - TEST1.

If it's weak and that's the cause of the outages, you can always poke around to improve it.

mateos2 wrote:

>>21416121 .
Huawei sends back the missing data as soon as coverage returns
Unless the coverage is mega-poor and bigger data doesn't get through

For longer interruptions, you can restore up to a month back.

cedrom wrote:

Interruptions to internet connection. Wifi at the limit of range.

.

k_pec wrote:

Have you checked what kind of wifi connection you have --> Link - TEST1.
If it's weak and that's the cause of the dropouts, you can always poke around to improve it.

Hi,
Unfortunately not this - inverter connected via ethernet cable.

And doesn't the home router catch crashes or have timed resets? My Growatt has as an intermediary such an ancient router monument with Gargoyle firmware preloaded, and it regularly crashes, and out of laziness (I'm not keen on re-pairing a possibly new Acces Point with the inverter's Dongle) I put up with having to regularly reset the router.

salo5 wrote:

Hi,
unfortunately not that - inverter connected via ethernet cable.

LAN can also cause problems when working with inverters, which can generate a lot of interference, so much so that the manufacturers themselves can recommend shielded twisted pair cables. Obviously grounded on both sides, otherwise all sorts of things can happen on an unshielded twisted pair cable.

It might be worth putting a switch under the inverter and testing TEST4 from the link provided earlier. It won't be entirely reliable, but it's always something.

Or maybe there is something on the way from the internet to the inverter, not to mention lag on the internet link itself to the cloud.

Good morning

Ik have a sun2000 -4KTL-L1 with a battery 10KW.
If I want to switch to off grid method, I switch off my grid and put my inverter in island mode. That works perfectly.
My son has a SUN2000-5KTL-M1 installation with a 14KW battery. If I want to switch to off grid method, I can't find the island grid in the list of grid codes. I do find User-defined (50 Hz) and User-defined (60 Hz).
Which grid setting should I take if I want to switch to off grid?

Greetings from Belgium

Thanks for helping

>>21481902
as a rule it is not possible to switch manually to island mode - it used to be possible, now it is not - for the inverter to switch to island mode specific conditions must be fulfilled which are implemented by the backup box - for details see the documentation of the backup box

>>21481941 Thanks

A year ago I planned to expand the system but something "didn't work out"
So I am back on topic
Thanks to @velkhor I have learnt a bit and now a summary
I have a Huawei SUN2000-8KTL-M1 + 16 Longi L4R-72HIH 445 W panels (or 7.1 KWh)
Well I plan to add 6 of the same (or strongly similar) panels.
22 * 445W = 9.8 KWh

So the question is: can I add them in the same string ? It would always be easier for me because I don't have to pull cables.
But I am not sure about these maximum voltage values.

.
.

At the moment I see these values on the inverter



I understand that at max from the panel will go 41-42 volts ? So 42 * 22 = 924 and it is quiet ?

ps. I know - at peak I will get max 8,8 KWh from this inverter anyway

Hi. Anyone have experience of buying/selling a used SUN2000? I may be replacing with a larger model and am wondering how to approach the subject so that the eventual new user doesn't have any problems. I was thinking of setting up some sort of left email account, changing the address in FusionSolar to this new one and then passing this on to the buyer. The question is whether this is the correct process, whether it is better to somehow deregister the unit so the new owner can add it to their account and whether to somehow do a reset to factory settings. I have an installer entry if that helps with anything (and a local one with a password and a remote one via the cloud with the possibility of e.g. software updates).

>>21533297 .
I have very little experience, but nevertheless some, so based on that I will conclude that it won't work. That 42V you write about is the voltage under load. I have 2 strings of 12 panels each and in theory I should see 480-500V there all the time, however it is not uncommon for me to have as much as 550V there, if only when I have cut production in the inverter due to the grid voltage being too high. 550V/12=~46V, which in turn in your case x22 panels = 1008V. My parents had 21 450W panels on 1 string and it was giving so many errors that the next day the crew were breaking it into two strings.

Remove the Logger and inverter from the cloud then it can be added to the new installation

What is needed to connect the string to the inverter?
Is there an ordinary M4 at the inverter? Do you need to buy plugs or sockets for the cables?

>>21569002 Included with the inverter are MC4s.

Well unfortunately I checked in the box and there is no .
Maybe the team "lost"
I understand that these are supposed to be M4 plugs ?

>>21569031 .

They don't, and they must be original connectors!
Otherwise their fit with those already fitted to the inverter will be poor.

The instructions for this:

Quote:

Use the positive and negative metal pins of the Staubli MC4 and DC connectors
supplied with the SUN2000 inverter. Use incompatible positive and
DC positive and negative metal terminals and connectors may cause serious consequences.
Induced damage to the unit is not covered by any warranty or service contract.

So what options do I have now ?
Can it be bought somewhere ?

You can buy staubli connectors from any good photovoltaic accessory shop https://allegro.pl/kategoria/przemysl-energet...woltaika-322024?marka=Staubli%20Multi-Contact .It is also important to use a crimping tool dedicated to MC4 connectors.

Well, that's what I thought was standard after all.

But workmanship can deviate from the standard, both in dimension and material. The general rule of thumb is that you should always get a set of connectors from one manufacturer. Otherwise they can degrade strongly or even burn out.

If the team "lost", they should also "find". If the inverter was new and has connectors in the equipment list, you should complain, and what would be the harm.

Regardless - check with the service centre to see if they have any original ones. If they don't - well, you'll have to buy something and get it right on the cables. Don't save money, but don't pay out of pocket either.