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LUNA Batteries - troubleshooting CASCADE

Created: Jan 25, 2022 13:28:37Latest reply: Feb 16, 2022 13:38:10 335 8 0 0 0
  HiCoins as reward: 0 (problem unresolved)

Hello everyone,

I'm a photovoltaic installer from Italy and I came accross a strange situation regarding one of the systems I built.

Site specifications:
 - HUAWEI SUN2000-4.6KTL-L1 with around 5kW photovoltaic

 - HUAWEI SUN2000-2KTL-L1  with around 2.7kW photovoltaic
 - 15kWh LUNA2000

 - SmartMeter


Here's the problem as you can see in the picture attached:
basically almost all of the production is exported and it doesn't go directly inside the battery nor the house.
I tried connecting the single inverters alone one at the time because I thought I did the connection wrong but still the same problem.
I double checked with a collegue the connections to see if I made a mistake but it seems like I did but still...
Also I noticed two things:
1) module nr. 3 of the LUNA is working way more than the other two
2) the firmware in LUNA module nr. 2 is older but wasn't able to update

Hope you guys can help me out with this :)


Thanks in advance,

M.

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Featured Answers

Recommended answer

olive.zhao
Admin Created Jan 26, 2022 01:09:43

Hello, friend!

Q1:

Use the FusionSolar app to connect to the inverter and check whether the system works in self-use mode.

Self-Consumption

This mode applies to areas where the electricity price is high, or areas where the FIT subsidy is low or unavailable.

  • Excess PV energy is stored in batteries. When PV power is insufficient or no PV power is generated at night, batteries discharge to supply power to the loads, improving the self-consumption rate of the PV system and the self-sufficiency rate of residential energy, and reducing electricity costs.

  • In this mode, Maximum self-consumption is selected. By default, the charge cutoff capacity is 100% and the discharge cutoff capacity is 0% for Huawei LUNA2000 batteries. For details about how to change the charge or discharge cutoff capacity, see Battery Commissioning.

Battery control parameter setting

The detailed setup process is described in Battery Deploy.

Q2:

You can refer to the following steps to upgrade your firmware:

Forced Charge and Discharge

Choose Maintenance Battery maintenance Forced charge and discharge, set forced charged and discharged parameters, and tap Submit.

Description of forced charge/discharge parameters

Downloading an Upgrade Package

1. When your phone is connected to a network, on the connection screen, tap tapin the upper right corner, and then choose File download.

Downloading a file

2. Download the device upgrade package and grid code when an update is detected.

3. On the screen for downloading the upgrade package, tap Download.

Hope this helps!

View more
  • x
  • convention:

FGSenergie
FGSenergie Created Feb 14, 2022 10:30:25 (0) (0)
Hello @olive.zhao and @Y_T_Z
Sorry for taking such a long time to write down this reply but I had been busy.
Here's the thing: I connect to the inverter, open the upgrade device window, select inverter (now it's version 107) and then I select from my phone the file which I downloaded from the support.huawei website.

As soon as I select the file I get the error message "The connection is interrupted. Try again" and of course I 
FGSenergie
FGSenergie Created Feb 22, 2022 09:06:58 (1) (0)
Hello @olive.zhao, could you please help out on this one?
Many thanks,
M.  
All Answers
Y_T_Z
Y_T_Z Admin Created Jan 25, 2022 13:29:13

Hello, dear.
It's nice to meet you in the community.
We're working on getting the right answer for you. Please rest assured that we'll be back with an answer shortly.
View more
  • x
  • convention:

Question: Are the 3x5kWh connected on 4.6, 2 or distributed in 10+5 on both?

PS: The management of the injection when there is a cascade of 2 or 3 inverters requires a WLAN-FE sdongle, perhaps necessary here too?

-----

Question : Les 3x5kWh sont-ils connectés sur le 4,6, le 2 ou distribués en 10+5 sur les deux ?

PS : La gestion de l'injection lorsqu'il y a une cascade de 2 ou 3 onduleurs nécessite un sdongle WLAN-FE, peut-être nécessaire ici aussi?

View more
  • x
  • convention:

Hello, friend!

Q1:

Use the FusionSolar app to connect to the inverter and check whether the system works in self-use mode.

Self-Consumption

This mode applies to areas where the electricity price is high, or areas where the FIT subsidy is low or unavailable.

  • Excess PV energy is stored in batteries. When PV power is insufficient or no PV power is generated at night, batteries discharge to supply power to the loads, improving the self-consumption rate of the PV system and the self-sufficiency rate of residential energy, and reducing electricity costs.

  • In this mode, Maximum self-consumption is selected. By default, the charge cutoff capacity is 100% and the discharge cutoff capacity is 0% for Huawei LUNA2000 batteries. For details about how to change the charge or discharge cutoff capacity, see Battery Commissioning.

Battery control parameter setting

The detailed setup process is described in Battery Deploy.

Q2:

You can refer to the following steps to upgrade your firmware:

Forced Charge and Discharge

Choose Maintenance Battery maintenance Forced charge and discharge, set forced charged and discharged parameters, and tap Submit.

Description of forced charge/discharge parameters

Downloading an Upgrade Package

1. When your phone is connected to a network, on the connection screen, tap tapin the upper right corner, and then choose File download.

Downloading a file

2. Download the device upgrade package and grid code when an update is detected.

3. On the screen for downloading the upgrade package, tap Download.

Hope this helps!

View more
  • x
  • convention:

FGSenergie
FGSenergie Created Feb 14, 2022 10:30:25 (0) (0)
Hello @olive.zhao and @Y_T_Z
Sorry for taking such a long time to write down this reply but I had been busy.
Here's the thing: I connect to the inverter, open the upgrade device window, select inverter (now it's version 107) and then I select from my phone the file which I downloaded from the support.huawei website.

As soon as I select the file I get the error message "The connection is interrupted. Try again" and of course I 
FGSenergie
FGSenergie Created Feb 22, 2022 09:06:58 (1) (0)
Hello @olive.zhao, could you please help out on this one?
Many thanks,
M.  
Thank you all for the answer, I will try and see how things are but I'm 99% sure it's already in the working mode you suggested.
I will let you know!
Thanks again,
M.
View more
  • x
  • convention:

Hi @olive.zhao not sure you saw the reply I created 2 days ago :)

The client is getting really mad because the system is not properly working.

Hope I could get an answer this week so that I can plan to solve this issue.

Many thanks,
M.
View more
  • x
  • convention:

Clearlove7
Clearlove7 Created Feb 25, 2022 06:27:53 (0) (0)
Hello, friend.
You are advised to contact the PV center to locate the root cause. You can send an email to the following email address describing your problem and attaching your SN number.
Europe Email: eu_inverter_support@huawei.com
China and Asia Pacific: solarservice@huawei.com
Latin America Email: la_inverter_support@huawei.com  

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