high grid voltage - frequent disconnection ac in

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maniel asked Sep 11, '23

high grid voltage - frequent disconnection ac in

good evening dear forum

i have an ESS configured with the german grid code with internal NS protection.

my grid exceeds about 5-10x daily the 10min above 253V. however, the grid voltage is hardly above 255V, only in exceptional cases up to 259V.

as a result, my multiplus disconnects from the grid accordingly 5-10x daily.

questions:

1. do i have to worry about the relays involved because of the number of switching operations over the years?

2. can i increase the value in the grid code to 255V (i am in portugal, not in DE and basically not feeding in either), or will this have negative effects?

THANKS

Multiplus-II grid voltage

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Answer 1 · 2023-09-11T21:26:14Z

maniel answered · Sep 11, 2023 at 09:26 PM

deutsche version:
https://community.victronenergy.com/questions/230928/hohe-netzspannung-haufige-trennung-ac-in.html?childToView=230933#answer-230933

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Answer 2 · 2023-09-12T03:17:00Z

billys1337 answered · Sep 12, 2023 at 03:17 AM

If you connect to the multiplus via VE Configure the windows software you should see settable parameters there you can adjust so it tolerates higher grid voltage.
Interesting to see your post as I had to adjust mine just today due to high grid voltage, i guess the cool sunny weather is causing everyone's grid tied solar systems to pump the voltage.

screenshot-2023-09-12-131454.png (21.9 KiB)

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Answer 3 · 2023-09-18T20:48:19Z

maniel answered · Sep 18, 2023 at 08:48 PM

thank you very much for your answer.

yes, this can be changed in the grid settings.

my question was more whether this has negative effects. according to the information available to me, certain consumers can become defective significantly earlier than with 230V.

so i will now try to find a solution for the high voltage with the grid operator.

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