Why can I not feedback into grid?

Question

question

adriaan-van-fraassen asked Oct 4, '23

Why can I not feedback into grid?

Hi, I have been struggling a lot to get my multiplus II feeding back into the grid. I have a Modbus controlled multiplus 2 via a Cerbo GX with Pylontech batteries. Everything I can control perfectly fine via Modbus. Only when I change the grid setpoint to a negative value nothing happens. When I change it to a positive value the multi start charging the batteries with the selected value.

I followed all steps in the manual for the Pylontech batteries setup in VE configure 3.

Multiphase regulation is set to individual phase

There is no pv coupled just the multi with the batteries and the grid

DVCC is forced on

Does anybody an idea why I can not feedback?

Multiplus-II Modbus TCP ess discharging

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Modifications Space

Node Red Space

Answer 1 · 2023-10-04T19:23:54Z

nickdb answered · Oct 04, 2023 at 07:23 PM

Is ESS loaded? Do you have a grid code configured? All a requirement for feeding back.

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Answer 2 · 2023-10-04T19:35:10Z

adriaan-van-fraassen answered · Oct 04, 2023 at 07:35 PM

Yes ESS is loaded and the German grid is configured. Aux relay 2 feedback signal is also unchecked in VE configure grid settings.

1

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

nickdb ♦♦ commented · Oct 04, 2023 at 08:09 PM

Can you send pics of the GX ESS config, the assistant config etc?

Has the pylon config doc been followed to the letter?

https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom

Always best to start with the basics and work back from there.

0 ·

Answer 3 · 2023-10-05T19:11:04Z

adriaan-van-fraassen answered · Oct 05, 2023 at 07:11 PM

I followed the pylon config completely. Here are my settings

config-1.png (96.0 KiB)

config-2.png (88.4 KiB)

config-3.png (93.4 KiB)

config-4.png (94.1 KiB)

config-5.png (90.5 KiB)

config-6.png (90.2 KiB)

config-8.png (84.7 KiB)

config-9.png (60.9 KiB)

ess-1.png (97.5 KiB)

ess-2.png (88.2 KiB)

vrm-1.png (33.2 KiB)

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

question