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Have installed a ESS system with a fronius primo 8.2.1 on the ac-out of a victron quatro 8000 and have disabled feed in as the grid does not permit it. some sunny days when batteries are charged and not much load the house it will export to the grid although the as the photos show fronius zero feed in is active, but when i check vrm and error message shows on PV status but when i check fronius solar web no fault is active. 
On the Fronius data manager has it been set to accept throttling from the GX?
Modbus tcp enabled on the gx?
Is the Fronius using "sunspec" as communication protocoll ? If it is using "solarapi" zero feedin will not work ? -> solarapi is read only.
The appropriate settings on the fronius side has been done ?
Jens
We have the same case, even if the settings for the fronius primo has been followed correctly.
On the Fronius data manager has it been set to accept throttling from the GX? Modbus tcp enabled on the gx?
Yes, sometimes status of the Primo is "Running (throttled)", and most of the time is "Error". Once it is in "Error" state, it will export to the grid,
I have notice one scenario today, if the Fronius Primo was in error code "581" during startup, and no one attended to confirm the error code issue. The Fronius will run into 'Error" state. But once the user confirmed this issue (by pressing the enter button on Fronius). Then the state of the Fronius will be "Running (Throttled)".
Is there a way to ignore this error on the Fronius side?
Error Code - 581 - SPUI is Activated
Description - Setup " Special Purpose Utility- Interactive" (SPUI) is activated.
This is because I have configured AC Coupling between Fronius and Multiplus2.
