question

haavardw avatar image
haavardw asked

Grid feed-in not working

Hi guys, I’m having an issue with my MultiPlus II.

This is my setup:

  • Multiplus connected to the grid via AC-in.
  • GerboGX.
  • 2x 200Ah 48v batteries with built-in BMS - connected and communicating with MultiPlus.
  • Homey connected to the system with intention to control the setup and adjust feed-in/charging based on electricity cost.

Charging works, and I’m also able to see that the Homey connection works.

ESS is configured, but I’m in no luck feeding back to the grid. :(

Any suggestions on what I have done wrong?

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Multiplus-IIESSgrid
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2 Answers
nickdb avatar image
nickdb answered ·

You need a compliant grid code set for ESS to work properly.

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haavardw avatar image haavardw commented ·
That easy? :P

Do you have any idea on which grid code to choose for Norway?

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nickdb avatar image nickdb ♦♦ haavardw commented ·
Not sure. What are your ESS settings from the GX?

You did enable DC feed in?

If you set a negative setpoint does it work?

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haavardw avatar image haavardw nickdb ♦♦ commented ·

Setpoint is -2000w. Chose Denmark for grid code. Unfortunately nothing else seems to have changed - it won't feed into grid. It keeps saying "charging". :( screenshot-2023-04-28-at-172720.pngscreenshot-2023-04-28-at-172732.pngimg-c0915502c7c5-1.jpeg

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haavardw avatar image
haavardw answered ·

Solved: For some reason, the system will not feed back to grid when the cable between the MK3 USB adapter and the inverter is connected. After pulling the cable, feed-in worked like charm. :)

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nickdb avatar image nickdb ♦♦ commented ·
Yes, you can’t have that and a gx connected simultaneously. It is documented, would have been a good point to mention as we’d have got to the bottom a lot quicker.
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