Got it

Repetitive pattern in I-V string

Created: Aug 6, 2022 16:06:55Latest reply: Aug 8, 2022 18:01:18 117 5 0 0 0
  HiCoins as reward: 0 (problem unresolved)
Hello,

The plant has one inverter SUN2000-5KTL L1,
with two PV strings.
PV string 1 is oriented to the West with 7 PV modules, and PV string 2 to the East with 6 modules. All modules are JA solar 385W.
The attached I-V graphs shows falls and abrupt rises several times. This pattern occurs all days at same hours with clear day, absolutely no clouds in the sky and no shadows in the PV fields.
Someone can explain the source of this? Inverter overheat? Some power limitation or MPPT misconfiguration?
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Featured Answers
Jerry_Lin
Admin Created Aug 7, 2022 08:56:21

Hello, friend.

In your case, it is recommended that you contact the PV center for a solution by sending an email to the following email address describing your problem and attaching the SN of your device.

  • 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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Jerry_Lin
Jerry_Lin Admin Created Aug 7, 2022 08:46:50

Hello, dear!

It's nice to meet you in the community.

We're working on your problem. Just a moment, please.

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Jerry_Lin
Jerry_Lin Admin Created Aug 7, 2022 08:56:21

Hello, friend.

In your case, it is recommended that you contact the PV center for a solution by sending an email to the following email address describing your problem and attaching the SN of your device.

  • Europe Email: eu_inverter_support@huawei.com

  • China and Asia Pacific: solarservice@huawei.com

  • Latin America Email: la_inverter_support@huawei.com

View more
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  • convention:

Sun_MRU
Sun_MRU Moderator Created Aug 8, 2022 11:14:18

In my opinion, it does not appear a technical issue related to the DC/ac conversion or major MPPT fault. It appears related to the weather. There could be variations in the sun intensity. Please check the fluctuations in the power.
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user_4815803
user_4815803 Created Aug 8, 2022 18:01:18

The sun power was constant without clouds. To be more sure, compare PV 1 with PV 2 at the same hour. If clouds are in the sky, both PV will be affected at the same time. This is not the case, as you can see in the graph.
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Jerry_Lin
Jerry_Lin Created 4 days ago (0) (0)
So I'm asking you to send an email to troubleshoot if there's a problem so you can get a quick solution.  

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