question

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mindaugas asked

Multiplus II ESS error 11 when generator is connected

Setup:

ESS Assistant (Europe)

Multiplus II 24/3000/70, Cerbo GX, MPPT 100/50, SmartShunt, LifePO4 210Ah 24V batteries

Feeding to Grid is not allowed

My idea was to install a automatic switch on the Multiplus input to switch between the grid and generator in case of grid failure.

The issue is that Multiplus gets an error

Error 11: Relay test fault on VE.Bus System when generator is connected to the input

Any Idea how to solve this issue?

Multiplus-IIGeneratorerrormultigrid
2 |3000
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2 Answers
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muammer answered ·

I think it can be solved in 2 ways. Check that the grid code you entered during setup is compatible with the main Multiplus and generator. Check your generator wiring.

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mindaugas answered ·

220V 50 Hz Generator has no dedicated neutral. Both outputs are kind of 110V towards ground. Generator is connected directly during test and there shall be no issues with wires in this test


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